dynamodb

package
v0.0.0-...-75216fc Latest Latest
Warning

This package is not in the latest version of its module.

 Go to latest Published: May 20, 2015 License: Apache-2.0 Imports: 4 Imported by: 0

Documentation

Overview

Package dynamodb provides a client for Amazon DynamoDB.

Index

Constants

This section is empty.

Variables

This section is empty.

Functions

This section is empty.

Types

type AttributeDefinition 

type AttributeDefinition struct {
	// A name for the attribute.
	AttributeName *string `type:"string" required:"true"`

	// The data type for the attribute.
	AttributeType *string `type:"string" required:"true"`
	// contains filtered or unexported fields
}

Represents an attribute for describing the key schema for the table and indexes.

type AttributeValue 

type AttributeValue struct {
	// A Binary data type.
	B []byte `type:"blob"`

	// A Boolean data type.
	BOOL *bool `type:"boolean"`

	// A Binary Set data type.
	BS [][]byte `type:"list"`

	// A List of attribute values.
	L []*AttributeValue `type:"list"`

	// A Map of attribute values.
	M *map[string]*AttributeValue `type:"map"`

	// A Number data type.
	N *string `type:"string"`

	// A Number Set data type.
	NS []*string `type:"list"`

	// A Null data type.
	NULL *bool `type:"boolean"`

	// A String data type.
	S *string `type:"string"`

	// A String Set data type.
	SS []*string `type:"list"`
	// contains filtered or unexported fields
}

Represents the data for an attribute. You can set one, and only one, of the elements.

Each attribute in an item is a name-value pair. An attribute can be single-valued or multi-valued set. For example, a book item can have title and authors attributes. Each book has one title but can have many authors. The multi-valued attribute is a set; duplicate values are not allowed.

type AttributeValueUpdate 

type AttributeValueUpdate struct {
	// Specifies how to perform the update. Valid values are PUT (default), DELETE,
	// and ADD. The behavior depends on whether the specified primary key already
	// exists in the table.
	//
	//  If an item with the specified Key is found in the table:
	//
	//   PUT - Adds the specified attribute to the item. If the attribute already
	// exists, it is replaced by the new value.
	//
	//   DELETE - If no value is specified, the attribute and its value are removed
	// from the item. The data type of the specified value must match the existing
	// value's data type.
	//
	// If a set of values is specified, then those values are subtracted from the
	// old set. For example, if the attribute value was the set [a,b,c] and the
	// DELETE action specified [a,c], then the final attribute value would be [b].
	// Specifying an empty set is an error.
	//
	//   ADD - If the attribute does not already exist, then the attribute and
	// its values are added to the item. If the attribute does exist, then the behavior
	// of ADD depends on the data type of the attribute:
	//
	//   If the existing attribute is a number, and if Value is also a number,
	// then the Value is mathematically added to the existing attribute. If Value
	// is a negative number, then it is subtracted from the existing attribute.
	//
	//   If you use ADD to increment or decrement a number value for an item that
	// doesn't exist before the update, DynamoDB uses 0 as the initial value.
	//
	// In addition, if you use ADD to update an existing item, and intend to increment
	// or decrement an attribute value which does not yet exist, DynamoDB uses 0
	// as the initial value. For example, suppose that the item you want to update
	// does not yet have an attribute named itemcount, but you decide to ADD the
	// number 3 to this attribute anyway, even though it currently does not exist.
	// DynamoDB will create the itemcount attribute, set its initial value to 0,
	// and finally add 3 to it. The result will be a new itemcount attribute in
	// the item, with a value of 3.
	//
	//    If the existing data type is a set, and if the Value is also a set, then
	// the Value is added to the existing set. (This is a set operation, not mathematical
	// addition.) For example, if the attribute value was the set [1,2], and the
	// ADD action specified [3], then the final attribute value would be [1,2,3].
	// An error occurs if an Add action is specified for a set attribute and the
	// attribute type specified does not match the existing set type.
	//
	// Both sets must have the same primitive data type. For example, if the existing
	// data type is a set of strings, the Value must also be a set of strings. The
	// same holds true for number sets and binary sets.
	//
	//   This action is only valid for an existing attribute whose data type is
	// number or is a set. Do not use ADD for any other data types.
	//
	//    If no item with the specified Key is found:
	//
	//   PUT - DynamoDB creates a new item with the specified primary key, and
	// then adds the attribute.
	//
	//   DELETE - Nothing happens; there is no attribute to delete.
	//
	//   ADD - DynamoDB creates an item with the supplied primary key and number
	// (or set of numbers) for the attribute value. The only data types allowed
	// are number and number set; no other data types can be specified.
	Action *string `type:"string"`

	// Represents the data for an attribute. You can set one, and only one, of the
	// elements.
	//
	// Each attribute in an item is a name-value pair. An attribute can be single-valued
	// or multi-valued set. For example, a book item can have title and authors
	// attributes. Each book has one title but can have many authors. The multi-valued
	// attribute is a set; duplicate values are not allowed.
	Value *AttributeValue `type:"structure"`
	// contains filtered or unexported fields
}

For the UpdateItem operation, represents the attributes to be modified, the action to perform on each, and the new value for each. 

You cannot use UpdateItem to update any primary key attributes. Instead,

you will need to delete the item, and then use PutItem to create a new item with new attributes. 

Attribute values cannot be null; string and binary type attributes must

have lengths greater than zero; and set type attributes must not be empty. Requests with empty values will be rejected with a ValidationException exception.

type BatchGetItemInput 

type BatchGetItemInput struct {
	// A map of one or more table names and, for each table, the corresponding primary
	// keys for the items to retrieve. Each table name can be invoked only once.
	//
	// Each element in the map consists of the following:
	//
	//   Keys - An array of primary key attribute values that define specific items
	// in the table. For each primary key, you must provide all of the key attributes.
	// For example, with a hash type primary key, you only need to provide the hash
	// attribute. For a hash-and-range type primary key, you must provide both the
	// hash attribute and the range attribute.
	//
	//   AttributesToGet - One or more attributes to be retrieved from the table.
	// By default, all attributes are returned. If a specified attribute is not
	// found, it does not appear in the result.
	//
	// Note that AttributesToGet has no effect on provisioned throughput consumption.
	// DynamoDB determines capacity units consumed based on item size, not on the
	// amount of data that is returned to an application.
	//
	//   ConsistentRead - If true, a strongly consistent read is used; if false
	// (the default), an eventually consistent read is used.
	RequestItems *map[string]*KeysAndAttributes `type:"map" required:"true"`

	// A value that if set to TOTAL, the response includes ConsumedCapacity data
	// for tables and indexes. If set to INDEXES, the response includes ConsumedCapacity
	// for indexes. If set to NONE (the default), ConsumedCapacity is not included
	// in the response.
	ReturnConsumedCapacity *string `type:"string"`
	// contains filtered or unexported fields
}

Represents the input of a BatchGetItem operation.

type BatchGetItemOutput 

type BatchGetItemOutput struct {
	// The read capacity units consumed by the operation.
	//
	// Each element consists of:
	//
	//   TableName - The table that consumed the provisioned throughput.
	//
	//   CapacityUnits - The total number of capacity units consumed.
	ConsumedCapacity []*ConsumedCapacity `type:"list"`

	// A map of table name to a list of items. Each object in Responses consists
	// of a table name, along with a map of attribute data consisting of the data
	// type and attribute value.
	Responses *map[string][]*map[string]*AttributeValue `type:"map"`

	// A map of tables and their respective keys that were not processed with the
	// current response. The UnprocessedKeys value is in the same form as RequestItems,
	// so the value can be provided directly to a subsequent BatchGetItem operation.
	// For more information, see RequestItems in the Request Parameters section.
	//
	// Each element consists of:
	//
	//   Keys - An array of primary key attribute values that define specific items
	// in the table.
	//
	//   AttributesToGet - One or more attributes to be retrieved from the table
	// or index. By default, all attributes are returned. If a requested attribute
	// is not found, it does not appear in the result.
	//
	//   ConsistentRead - The consistency of a read operation. If set to true,
	// then a strongly consistent read is used; otherwise, an eventually consistent
	// read is used.
	//
	//   If there are no unprocessed keys remaining, the response contains an empty
	// UnprocessedKeys map.
	UnprocessedKeys *map[string]*KeysAndAttributes `type:"map"`
	// contains filtered or unexported fields
}

Represents the output of a BatchGetItem operation.

type BatchWriteItemInput 

type BatchWriteItemInput struct {
	// A map of one or more table names and, for each table, a list of operations
	// to be performed (DeleteRequest or PutRequest). Each element in the map consists
	// of the following:
	//
	//   DeleteRequest - Perform a DeleteItem operation on the specified item.
	// The item to be deleted is identified by a Key subelement:
	//
	//   Key - A map of primary key attribute values that uniquely identify the
	// ! item. Each entry in this map consists of an attribute name and an attribute
	// value. For each primary key, you must provide all of the key attributes.
	// For example, with a hash type primary key, you only need to provide the hash
	// attribute. For a hash-and-range type primary key, you must provide both the
	// hash attribute and the range attribute.
	//
	//     PutRequest - Perform a PutItem operation on the specified item. The
	// item to be put is identified by an Item subelement:
	//
	//   Item - A map of attributes and their values. Each entry in this map consists
	// of an attribute name and an attribute value. Attribute values must not be
	// null; string and binary type attributes must have lengths greater than zero;
	// and set type attributes must not be empty. Requests that contain empty values
	// will be rejected with a ValidationException exception.
	//
	// If you specify any attributes that are part of an index key, then the data
	// types for those attributes must match those of the schema in the table's
	// attribute definition.
	RequestItems *map[string][]*WriteRequest `type:"map" required:"true"`

	// A value that if set to TOTAL, the response includes ConsumedCapacity data
	// for tables and indexes. If set to INDEXES, the response includes ConsumedCapacity
	// for indexes. If set to NONE (the default), ConsumedCapacity is not included
	// in the response.
	ReturnConsumedCapacity *string `type:"string"`

	// A value that if set to SIZE, the response includes statistics about item
	// collections, if any, that were modified during the operation are returned
	// in the response. If set to NONE (the default), no statistics are returned.
	ReturnItemCollectionMetrics *string `type:"string"`
	// contains filtered or unexported fields
}

Represents the input of a BatchWriteItem operation.

type BatchWriteItemOutput 

type BatchWriteItemOutput struct {
	// The capacity units consumed by the operation.
	//
	// Each element consists of:
	//
	//   TableName - The table that consumed the provisioned throughput.
	//
	//   CapacityUnits - The total number of capacity units consumed.
	ConsumedCapacity []*ConsumedCapacity `type:"list"`

	// A list of tables that were processed by BatchWriteItem and, for each table,
	// information about any item collections that were affected by individual DeleteItem
	// or PutItem operations.
	//
	// Each entry consists of the following subelements:
	//
	//   ItemCollectionKey - The hash key value of the item collection. This is
	// the same as the hash key of the item.
	//
	//   SizeEstimateRange - An estimate of item collection size, expressed in
	// GB. This is a two-element array containing a lower bound and an upper bound
	// for the estimate. The estimate includes the size of all the items in the
	// table, plus the size of all attributes projected into all of the local secondary
	// indexes on the table. Use this estimate to measure whether a local secondary
	// index is approaching its size limit.
	//
	// The estimate is subject to change over time; therefore, do not rely on the
	// precision or accuracy of the estimate.
	ItemCollectionMetrics *map[string][]*ItemCollectionMetrics `type:"map"`

	// A map of tables and requests against those tables that were not processed.
	// The UnprocessedItems value is in the same form as RequestItems, so you can
	// provide this value directly to a subsequent BatchGetItem operation. For more
	// information, see RequestItems in the Request Parameters section.
	//
	// Each UnprocessedItems entry consists of a table name and, for that table,
	// a list of operations to perform (DeleteRequest or PutRequest).
	//
	//   DeleteRequest - Perform a DeleteItem operation on the specified item.
	// The item to be deleted is identified by a Key subelement:
	//
	//   Key - A map of primary key attribute values that uniquely identify the
	// item. Each entry in this map consists of an attribute name and an attribute
	// value.
	//
	//     PutRequest - Perform a PutItem operation on the specified item. The
	// item to be put is identified by an Item subelement:
	//
	//   Item - A map of attributes and their values. Each entry in this map consists
	// of an attribute name and an attribute value. Attribute values must not be
	// null; string and binary type attributes must have lengths greater than zero;
	// and set type attributes must not be empty. Requests that contain empty values
	// will be rejected with a ValidationException exception.
	//
	// If you specify any attributes that are part of an index key, then the data
	// types for those attributes must match those of the schema in the table's
	// attribute definition.
	//
	//     If there are no unprocessed items remaining, the response contains an
	// empty UnprocessedItems map.
	UnprocessedItems *map[string][]*WriteRequest `type:"map"`
	// contains filtered or unexported fields
}

Represents the output of a BatchWriteItem operation.

type Capacity 

type Capacity struct {
	// The total number of capacity units consumed on a table or an index.
	CapacityUnits *float64 `type:"double"`
	// contains filtered or unexported fields
}

Represents the amount of provisioned throughput capacity consumed on a table or an index.

type Condition 

type Condition struct {
	// One or more values to evaluate against the supplied attribute. The number
	// of values in the list depends on the ComparisonOperator being used.
	//
	// For type Number, value comparisons are numeric.
	//
	// String value comparisons for greater than, equals, or less than are based
	// on ASCII character code values. For example, a is greater than A, and a is
	// greater than B. For a list of code values, see http://en.wikipedia.org/wiki/ASCII#ASCII_printable_characters
	// (http://en.wikipedia.org/wiki/ASCII#ASCII_printable_characters).
	//
	// For Binary, DynamoDB treats each byte of the binary data as unsigned when
	// it compares binary values.
	AttributeValueList []*AttributeValue `type:"list"`

	// A comparator for evaluating attributes. For example, equals, greater than,
	// less than, etc.
	//
	// The following comparison operators are available:
	//
	// EQ | NE | LE | LT | GE | GT | NOT_NULL | NULL | CONTAINS | NOT_CONTAINS
	// | BEGINS_WITH | IN | BETWEEN
	//
	// The following are descriptions of each comparison operator.
	//
	//   EQ : Equal. EQ is supported for all datatypes, including lists and maps.
	//
	// AttributeValueList can contain only one AttributeValue element of type String,
	// Number, Binary, String Set, Number Set, or Binary Set. If an item contains
	// an AttributeValue element of a different type than the one provided in the
	// request, the value does not match. For example, {"S":"6"} does not equal
	// {"N":"6"}. Also, {"N":"6"} does not equal {"NS":["6", "2", "1"]}.
	//
	//    NE : Not equal. NE is supported for all datatypes, including lists and
	// maps.
	//
	// AttributeValueList can contain only one AttributeValue of type String, Number,
	// Binary, String Set, Number Set, or Binary Set. If an item contains an AttributeValue
	// of a different type than the one provided in the request, the value does
	// not match. For example, {"S":"6"} does not equal {"N":"6"}. Also, {"N":"6"}
	// does not equal {"NS":["6", "2", "1"]}.
	//
	//    LE : Less than or equal.
	//
	// AttributeValueList can contain only one AttributeValue element of type String,
	// Number, or Binary (not a set type). If an item contains an AttributeValue
	// element of a different type than the one provided in the request, the value
	// does not match. For example, {"S":"6"} does not equal {"N":"6"}. Also, {"N":"6"}
	// does not compare to {"NS":["6", "2", "1"]}.
	//
	//    LT : Less than.
	//
	// AttributeValueList can contain only one AttributeValue of type String, Number,
	// or Binary (not a set type). If an item contains an AttributeValue element
	// of a different type than the one provided in the request, the value does
	// not match. For example, {"S":"6"} does not equal {"N":"6"}. Also, {"N":"6"}
	// does not compare to {"NS":["6", "2", "1"]}.
	//
	//    GE : Greater than or equal.
	//
	// AttributeValueList can contain only one AttributeValue element of type String,
	// Number, or Binary (not a set type). If an item contains an AttributeValue
	// element of a different type than the one provided in the request, the value
	// does not match. For example, {"S":"6"} does not equal {"N":"6"}. Also, {"N":"6"}
	// does not compare to {"NS":["6", "2", "1"]}.
	//
	//    GT : Greater than.
	//
	// AttributeValueList can contain only one AttributeValue element of type String,
	// Number, or Binary (not a set type). If an item contains an AttributeValue
	// element of a different type than the one provided in the request, the value
	// does not match. For example, {"S":"6"} does not equal {"N":"6"}. Also, {"N":"6"}
	// does not compare to {"NS":["6", "2", "1"]}.
	//
	//    NOT_NULL : The attribute exists. NOT_NULL is supported for all datatypes,
	// including lists and maps.
	//
	// This operator tests for the existence of an attribute, not its data type.
	// If the data type of attribute "a" is null, and you evaluate it using NOT_NULL,
	// the result is a Boolean true. This result is because the attribute "a" exists;
	// its data type is not relevant to the NOT_NULL comparison operator.
	//
	//    NULL : The attribute does not exist. NULL is supported for all datatypes,
	// including lists and maps.
	//
	// This operator tests for the nonexistence of an attribute, not its data type.
	// If the data type of attribute "a" is null, and you evaluate it using NULL,
	// the result is a Boolean false. This is because the attribute "a" exists;
	// its data type is not relevant to the NULL comparison operator.
	//
	//    CONTAINS : Checks for a subsequence, or value in a set.
	//
	// AttributeValueList can contain only one AttributeValue element of type String,
	// Number, or Binary (not a set type). If the target attribute of the comparison
	// is of type String, then the operator checks for a substring match. If the
	// target attribute of the comparison is of type Binary, then the operator looks
	// for a subsequence of the target that matches the input. If the target attribute
	// of the comparison is a set ("SS", "NS", or "BS"), then the operator evaluates
	// to true if it finds an exact match with any member of the set.
	//
	// CONTAINS is supported for lists: When evaluating "a CONTAINS b", "a" can
	// be a list; however, "b" cannot be a set, a map, or a list.
	//
	//   NOT_CONTAINS : Checks for absence of a subsequence, or absence of a value
	// in a set.
	//
	// AttributeValueList can contain only one AttributeValue element of type String,
	// Number, or Binary (not a set type). If the target attribute of the comparison
	// is a String, then the operator checks for the absence of a substring match.
	// If the target attribute of the comparison is Binary, then the operator checks
	// for the absence of a subsequence of the target that matches the input. If
	// the target attribute of the comparison is a set ("SS", "NS", or "BS"), then
	// the operator evaluates to true if it does not find an exact match with any
	// member of the set.
	//
	// NOT_CONTAINS is supported for lists: When evaluating "a NOT CONTAINS b",
	// "a" can be a list; however, "b" cannot be a set, a map, or a list.
	//
	//   BEGINS_WITH : Checks for a prefix.
	//
	// AttributeValueList can contain only one AttributeValue of type String or
	// Binary (not a Number or a set type). The target attribute of the comparison
	// must be of type String or Binary (not a Number or a set type).
	//
	//    IN : Checks for matching elements within two sets.
	//
	// AttributeValueList can contain one or more AttributeValue elements of type
	// String, Number, or Binary (not a set type). These attributes are compared
	// against an existing set type attribute of an item. If any elements of the
	// input set are present in the item attribute, the expression evaluates to
	// true.
	//
	//   BETWEEN : Greater than or equal to the first value, and less than or equal
	// to the second value.
	//
	// AttributeValueList must contain two AttributeValue elements of the same
	// type, either String, Number, or Binary (not a set type). A target attribute
	// matches if the target value is greater than, or equal to, the first element
	// and less than, or equal to, the second element. If an item contains an AttributeValue
	// element of a different type than the one provided in the request, the value
	// does not match. For example, {"S":"6"} does not compare to {"N":"6"}. Also,
	// {"N":"6"} does not compare to {"NS":["6", "2", "1"]}
	//
	//   For usage examples of AttributeValueList and ComparisonOperator, see Legacy
	// Conditional Parameters (http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/LegacyConditionalParameters.html)
	// in the Amazon DynamoDB Developer Guide.
	ComparisonOperator *string `type:"string" required:"true"`
	// contains filtered or unexported fields
}

Represents the selection criteria for a Query or Scan operation: 

For a Query operation, Condition is used for specifying the KeyConditions

to use when querying a table or an index. For KeyConditions, only the following comparison operators are supported: 

EQ | LE | LT | GE | GT | BEGINS_WITH | BETWEEN

Condition is also used in a QueryFilter, which evaluates the query results and returns only the desired values. 

For a Scan operation, Condition is used in a ScanFilter, which evaluates

the scan results and returns only the desired values.

type ConsumedCapacity 

type ConsumedCapacity struct {
	// The total number of capacity units consumed by the operation.
	CapacityUnits *float64 `type:"double"`

	// The amount of throughput consumed on each global index affected by the operation.
	GlobalSecondaryIndexes *map[string]*Capacity `type:"map"`

	// The amount of throughput consumed on each local index affected by the operation.
	LocalSecondaryIndexes *map[string]*Capacity `type:"map"`

	// The amount of throughput consumed on the table affected by the operation.
	Table *Capacity `type:"structure"`

	// The name of the table that was affected by the operation.
	TableName *string `type:"string"`
	// contains filtered or unexported fields
}

The capacity units consumed by an operation. The data returned includes the total provisioned throughput consumed, along with statistics for the table and any indexes involved in the operation. ConsumedCapacity is only returned if the request asked for it. For more information, see Provisioned Throughput (http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/ProvisionedThroughputIntro.html) in the Amazon DynamoDB Developer Guide.

type CreateGlobalSecondaryIndexAction 

type CreateGlobalSecondaryIndexAction struct {
	// The name of the global secondary index to be created.
	IndexName *string `type:"string" required:"true"`

	// The key schema for the global secondary index.
	KeySchema []*KeySchemaElement `type:"list" required:"true"`

	// Represents attributes that are copied (projected) from the table into an
	// index. These are in addition to the primary key attributes and index key
	// attributes, which are automatically projected.
	Projection *Projection `type:"structure" required:"true"`

	// Represents the provisioned throughput settings for a specified table or index.
	// The settings can be modified using the UpdateTable operation.
	//
	// For current minimum and maximum provisioned throughput values, see Limits
	// (http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Limits.html)
	// in the Amazon DynamoDB Developer Guide.
	ProvisionedThroughput *ProvisionedThroughput `type:"structure" required:"true"`
	// contains filtered or unexported fields
}

Represents a new global secondary index to be added to an existing table.

type CreateTableInput 

type CreateTableInput struct {
	// An array of attributes that describe the key schema for the table and indexes.
	AttributeDefinitions []*AttributeDefinition `type:"list" required:"true"`

	// One or more global secondary indexes (the maximum is five) to be created
	// on the table. Each global secondary index in the array includes the following:
	//
	//   IndexName - The name of the global secondary index. Must be unique only
	// for this table.
	//
	//    KeySchema - Specifies the key schema for the global secondary index.
	//
	//   Projection - Specifies attributes that are copied (projected) from the
	// table into the index. These are in addition to the primary key attributes
	// and index key attributes, which are automatically projected. Each attribute
	// specification is composed of:
	//
	//   ProjectionType - One of the following:
	//
	//   KEYS_ONLY - Only the index and primary keys are projected into the index.
	//
	//   INCLUDE - Only the specified table attributes are projected into the index.
	// The list of projected attributes are in NonKeyAttributes.
	//
	//   ALL - All of the table attributes are projected into the index.
	//
	//     NonKeyAttributes - A list of one or more non-key attribute names that
	// are projected into the secondary index. The total count of attributes provided
	// in NonKeyAttributes, summed across all of the secondary indexes, must not
	// exceed 20. If you project the same attribute into two different indexes,
	// this counts as two distinct attributes when determining the total.
	//
	//     ProvisionedThroughput - The provisioned throughput settings for the
	// global secondary index, consisting of read and write capacity units.
	GlobalSecondaryIndexes []*GlobalSecondaryIndex `type:"list"`

	// Specifies the attributes that make up the primary key for a table or an index.
	// The attributes in KeySchema must also be defined in the AttributeDefinitions
	// array. For more information, see Data Model (http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/DataModel.html)
	// in the Amazon DynamoDB Developer Guide.
	//
	// Each KeySchemaElement in the array is composed of:
	//
	//   AttributeName - The name of this key attribute.
	//
	//   KeyType - Determines whether the key attribute is HASH or RANGE.
	//
	//   For a primary key that consists of a hash attribute, you must provide
	// exactly one element with a KeyType of HASH.
	//
	// For a primary key that consists of hash and range attributes, you must provide
	// exactly two elements, in this order: The first element must have a KeyType
	// of HASH, and the second element must have a KeyType of RANGE.
	//
	// For more information, see Specifying the Primary Key (http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/WorkingWithTables.html#WorkingWithTables.primary.key)
	// in the Amazon DynamoDB Developer Guide.
	KeySchema []*KeySchemaElement `type:"list" required:"true"`

	// One or more local secondary indexes (the maximum is five) to be created on
	// the table. Each index is scoped to a given hash key value. There is a 10
	// GB size limit per hash key; otherwise, the size of a local secondary index
	// is unconstrained.
	//
	// Each local secondary index in the array includes the following:
	//
	//   IndexName - The name of the local secondary index. Must be unique only
	// for this table.
	//
	//    KeySchema - Specifies the key schema for the local secondary index. The
	// key schema must begin with the same hash key attribute as the table.
	//
	//   Projection - Specifies attributes that are copied (projected) from the
	// table into the index. These are in addition to the primary key attributes
	// and index key attributes, which are automatically projected. Each attribute
	// specification is composed of:
	//
	//   ProjectionType - One of the following:
	//
	//   KEYS_ONLY - Only the index and primary keys are projected into the index.
	//
	//   INCLUDE - Only the specified table attributes are projected into the index.
	// The list of projected attributes are in NonKeyAttributes.
	//
	//   ALL - All of the table attributes are projected into the index.
	//
	//     NonKeyAttributes - A list of one or more non-key attribute names that
	// are projected into the secondary index. The total count of attributes provided
	// in NonKeyAttributes, summed across all of the secondary indexes, must not
	// exceed 20. If you project the same attribute into two different indexes,
	// this counts as two distinct attributes when determining the total.
	LocalSecondaryIndexes []*LocalSecondaryIndex `type:"list"`

	// Represents the provisioned throughput settings for a specified table or index.
	// The settings can be modified using the UpdateTable operation.
	//
	// For current minimum and maximum provisioned throughput values, see Limits
	// (http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Limits.html)
	// in the Amazon DynamoDB Developer Guide.
	ProvisionedThroughput *ProvisionedThroughput `type:"structure" required:"true"`

	// The name of the table to create.
	TableName *string `type:"string" required:"true"`
	// contains filtered or unexported fields
}

Represents the input of a CreateTable operation.

type CreateTableOutput 

type CreateTableOutput struct {
	// Represents the properties of a table.
	TableDescription *TableDescription `type:"structure"`
	// contains filtered or unexported fields
}

Represents the output of a CreateTable operation.

type DeleteGlobalSecondaryIndexAction 

type DeleteGlobalSecondaryIndexAction struct {
	// The name of the global secondary index to be deleted.
	IndexName *string `type:"string" required:"true"`
	// contains filtered or unexported fields
}

Represents a global secondary index to be deleted from an existing table.

type DeleteItemInput 

type DeleteItemInput struct {
	// A condition that must be satisfied in order for a conditional DeleteItem
	// to succeed.
	//
	// An expression can contain any of the following:
	//
	//   Boolean functions: attribute_exists | attribute_not_exists | contains
	// | begins_with
	//
	// These function names are case-sensitive.
	//
	//   Comparison operators:  = | <> | < | > | <= | >= | BETWEEN | IN
	//
	//    Logical operators: AND | OR | NOT
	//
	//   For more information on condition expressions, go to Specifying Conditions
	// (http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Expressions.SpecifyingConditions.html)
	// in the Amazon DynamoDB Developer Guide.
	ConditionExpression *string `type:"string"`

	// There is a newer parameter available. Use ConditionExpression instead. Note
	// that if you use ConditionalOperator and  ConditionExpression  at the same
	// time, DynamoDB will return a ValidationException exception.
	//
	//  A logical operator to apply to the conditions in the Expected map:
	//
	//  AND - If all of the conditions evaluate to true, then the entire map evaluates
	// to true.
	//
	// OR - If at least one of the conditions evaluate to true, then the entire
	// map evaluates to true.
	//
	//  If you omit ConditionalOperator, then AND is the default.
	//
	// The operation will succeed only if the entire map evaluates to true.
	//
	// This parameter does not support attributes of type List or Map.
	ConditionalOperator *string `type:"string"`

	// There is a newer parameter available. Use ConditionExpression instead. Note
	// that if you use Expected and  ConditionExpression  at the same time, DynamoDB
	// will return a ValidationException exception.
	//
	//  A map of attribute/condition pairs. Expected provides a conditional block
	// for the DeleteItem operation.
	//
	// Each element of Expected consists of an attribute name, a comparison operator,
	// and one or more values. DynamoDB compares the attribute with the value(s)
	// you supplied, using the comparison operator. For each Expected element, the
	// result of the evaluation is either true or false.
	//
	// If you specify more than one element in the Expected map, then by default
	// all of the conditions must evaluate to true. In other words, the conditions
	// are ANDed together. (You can use the ConditionalOperator parameter to OR
	// the conditions instead. If you do this, then at least one of the conditions
	// must evaluate to true, rather than all of them.)
	//
	// If the Expected map evaluates to true, then the conditional operation succeeds;
	// otherwise, it fails.
	//
	// Expected contains the following:
	//
	//   AttributeValueList - One or more values to evaluate against the supplied
	// attribute. The number of values in the list depends on the ComparisonOperator
	// being used.
	//
	// For type Number, value comparisons are numeric.
	//
	// String value comparisons for greater than, equals, or less than are based
	// on ASCII character code values. For example, a is greater than A, and a is
	// greater than B. For a list of code values, see http://en.wikipedia.org/wiki/ASCII#ASCII_printable_characters.
	//
	// For type Binary, DynamoDB treats each byte of the binary data as unsigned
	// when it compares binary values.
	//
	//   ComparisonOperator - A comparator for evaluating attributes in the AttributeValueList.
	// When performing the comparison, DynamoDB uses strongly consistent reads.
	//
	// The following comparison operators are available:
	//
	// EQ | NE | LE | LT | GE | GT | NOT_NULL | NULL | CONTAINS | NOT_CONTAINS
	// | BEGINS_WITH | IN | BETWEEN
	//
	// The following are descriptions of each comparison operator.
	//
	//   EQ : Equal. EQ is supported for all datatypes, including lists and maps.
	//
	// AttributeValueList can contain only one AttributeValue element of type String,
	// Number, Binary, String Set, Number Set, or Binary Set. If an item contains
	// an AttributeValue element of a different type than the one provided in the
	// request, the value does not match. For example, {"S":"6"} does not equal
	// {"N":"6"}. Also, {"N":"6"} does not equal {"NS":["6", "2", "1"]}.
	//
	//    NE : Not equal. NE is supported for all datatypes, including lists and
	// maps.
	//
	// AttributeValueList can contain only one AttributeValue of type String, Number,
	// Binary, String Set, Number Set, or Binary Set. If an item contains an AttributeValue
	// of a different type than the one provided in the request, the value does
	// not match. For example, {"S":"6"} does not equal {"N":"6"}. Also, {"N":"6"}
	// does not equal {"NS":["6", "2", "1"]}.
	//
	//    LE : Less than or equal.
	//
	// AttributeValueList can contain only one AttributeValue element of type String,
	// Number, or Binary (not a set type). If an item contains an AttributeValue
	// element of a different type than the one provided in the request, the value
	// does not match. For example, {"S":"6"} does not equal {"N":"6"}. Also, {"N":"6"}
	// does not compare to {"NS":["6", "2", "1"]}.
	//
	//    LT : Less than.
	//
	// AttributeValueList can contain only one AttributeValue of type String, Number,
	// or Binary (not a set type). If an item contains an AttributeValue element
	// of a different type than the one provided in the request, the value does
	// not match. For example, {"S":"6"} does not equal {"N":"6"}. Also, {"N":"6"}
	// does not compare to {"NS":["6", "2", "1"]}.
	//
	//    GE : Greater than or equal.
	//
	// AttributeValueList can contain only one AttributeValue element of type String,
	// Number, or Binary (not a set type). If an item contains an AttributeValue
	// element of a different type than the one provided in the request, the value
	// does not match. For example, {"S":"6"} does not equal {"N":"6"}. Also, {"N":"6"}
	// does not compare to {"NS":["6", "2", "1"]}.
	//
	//    GT : Greater than.
	//
	// AttributeValueList can contain only one AttributeValue element of type String,
	// Number, or Binary (not a set type). If an item contains an AttributeValue
	// element of a different type than the one provided in the request, the value
	// does not match. For example, {"S":"6"} does not equal {"N":"6"}. Also, {"N":"6"}
	// does not compare to {"NS":["6", "2", "1"]}.
	//
	//    NOT_NULL : The attribute exists. NOT_NULL is supported for all datatypes,
	// including lists and maps.
	//
	// This operator tests for the existence of an attribute, not its data type.
	// If the data type of attribute "a" is null, and you evaluate it using NOT_NULL,
	// the result is a Boolean true. This result is because the attribute "a" exists;
	// its data type is not relevant to the NOT_NULL comparison operator.
	//
	//    NULL : The attribute does not exist. NULL is supported for all datatypes,
	// including lists and maps.
	//
	// This operator tests for the nonexistence of an attribute, not its data type.
	// If the data type of attribute "a" is null, and you evaluate it using NULL,
	// the result is a Boolean false. This is because the attribute "a" exists;
	// its data type is not relevant to the NULL comparison operator.
	//
	//    CONTAINS : Checks for a subsequence, or value in a set.
	//
	// AttributeValueList can contain only one AttributeValue element of type String,
	// Number, or Binary (not a set type). If the target attribute of the comparison
	// is of type String, then the operator checks for a substring match. If the
	// target attribute of the comparison is of type Binary, then the operator looks
	// for a subsequence of the target that matches the input. If the target attribute
	// of the comparison is a set ("SS", "NS", or "BS"), then the operator evaluates
	// to true if it finds an exact match with any member of the set.
	//
	// CONTAINS is supported for lists: When evaluating "a CONTAINS b", "a" can
	// be a list; however, "b" cannot be a set, a map, or a list.
	//
	//   NOT_CONTAINS : Checks for absence of a subsequence, or absence of a value
	// in a set.
	//
	// AttributeValueList can contain only one AttributeValue element of type String,
	// Number, or Binary (not a set type). If the target attribute of the comparison
	// is a String, then the operator checks for the absence of a substring match.
	// If the target attribute of the comparison is Binary, then the operator checks
	// for the absence of a subsequence of the target that matches the input. If
	// the target attribute of the comparison is a set ("SS", "NS", or "BS"), then
	// the operator evaluates to true if it does not find an exact match with any
	// member of the set.
	//
	// NOT_CONTAINS is supported for lists: When evaluating "a NOT CONTAINS b",
	// "a" can be a list; however, "b" cannot be a set, a map, or a list.
	//
	//   BEGINS_WITH : Checks for a prefix.
	//
	// AttributeValueList can contain only one AttributeValue of type String or
	// Binary (not a Number or a set type). The target attribute of the comparison
	// must be of type String or Binary (not a Number or a set type).
	//
	//    IN : Checks for matching elements within two sets.
	//
	// AttributeValueList can contain one or more AttributeValue elements of type
	// String, Number, or Binary (not a set type). These attributes are compared
	// against an existing set type attribute of an item. If any elements of the
	// input set are present in the item attribute, the expression evaluates to
	// true.
	//
	//   BETWEEN : Greater than or equal to the first value, and less than or equal
	// to the second value.
	//
	// AttributeValueList must contain two AttributeValue elements of the same
	// type, either String, Number, or Binary (not a set type). A target attribute
	// matches if the target value is greater than, or equal to, the first element
	// and less than, or equal to, the second element. If an item contains an AttributeValue
	// element of a different type than the one provided in the request, the value
	// does not match. For example, {"S":"6"} does not compare to {"N":"6"}. Also,
	// {"N":"6"} does not compare to {"NS":["6", "2", "1"]}
	//
	//     For usage examples of AttributeValueList and ComparisonOperator, see
	// Legacy Conditional Parameters (http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/LegacyConditionalParameters.html)
	// in the Amazon DynamoDB Developer Guide.
	//
	// For backward compatibility with previous DynamoDB releases, the following
	// parameters can be used instead of AttributeValueList and ComparisonOperator:
	//
	//   Value - A value for DynamoDB to compare with an attribute.
	//
	//   Exists - A Boolean value that causes DynamoDB to evaluate the value before
	// attempting the conditional operation:
	//
	//   If Exists is true, DynamoDB will check to see if that attribute value
	// already exists in the table. If it is found, then the condition evaluates
	// to true; otherwise the condition evaluate to false.
	//
	//  If Exists is false, DynamoDB assumes that the attribute value does not
	// exist in the table. If in fact the value does not exist, then the assumption
	// is valid and the condition evaluates to true. If the value is found, despite
	// the assumption that it does not exist, the condition evaluates to false.
	//
	//  Note that the default value for Exists is true.
	//
	//   The Value and Exists parameters are incompatible with AttributeValueList
	// and ComparisonOperator. Note that if you use both sets of parameters at once,
	// DynamoDB will return a ValidationException exception.
	//
	// This parameter does not support attributes of type List or Map.
	Expected *map[string]*ExpectedAttributeValue `type:"map"`

	// One or more substitution tokens for attribute names in an expression. The
	// following are some use cases for using ExpressionAttributeNames:
	//
	//   To access an attribute whose name conflicts with a DynamoDB reserved word.
	//
	//   To create a placeholder for repeating occurrences of an attribute name
	// in an expression.
	//
	//   To prevent special characters in an attribute name from being misinterpreted
	// in an expression.
	//
	//   Use the # character in an expression to dereference an attribute name.
	// For example, consider the following attribute name:
	//
	// Percentile
	//
	// The name of this attribute conflicts with a reserved word, so it cannot
	// be used directly in an expression. (For the complete list of reserved words,
	// go to Reserved Words (http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/ReservedWords.html)
	// in the Amazon DynamoDB Developer Guide). To work around this, you could specify
	// the following for ExpressionAttributeNames:
	//
	// {"#P":"Percentile"}
	//
	// You could then use this substitution in an expression, as in this example:
	//
	// #P = :val
	//
	// Tokens that begin with the : character are expression attribute values,
	// which are placeholders for the actual value at runtime.
	//
	// For more information on expression attribute names, go to Accessing Item
	// Attributes (http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Expressions.AccessingItemAttributes.html)
	// in the Amazon DynamoDB Developer Guide.
	ExpressionAttributeNames *map[string]*string `type:"map"`

	// One or more values that can be substituted in an expression.
	//
	// Use the : (colon) character in an expression to dereference an attribute
	// value. For example, suppose that you wanted to check whether the value of
	// the ProductStatus attribute was one of the following:
	//
	// Available | Backordered | Discontinued
	//
	// You would first need to specify ExpressionAttributeValues as follows:
	//
	// { ":avail":{"S":"Available"}, ":back":{"S":"Backordered"}, ":disc":{"S":"Discontinued"}
	// }
	//
	// You could then use these values in an expression, such as this:
	//
	// ProductStatus IN (:avail, :back, :disc)
	//
	// For more information on expression attribute values, go to Specifying Conditions
	// (http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Expressions.SpecifyingConditions.html)
	// in the Amazon DynamoDB Developer Guide.
	ExpressionAttributeValues *map[string]*AttributeValue `type:"map"`

	// A map of attribute names to AttributeValue objects, representing the primary
	// key of the item to delete.
	//
	// For the primary key, you must provide all of the attributes. For example,
	// with a hash type primary key, you only need to provide the hash attribute.
	// For a hash-and-range type primary key, you must provide both the hash attribute
	// and the range attribute.
	Key *map[string]*AttributeValue `type:"map" required:"true"`

	// A value that if set to TOTAL, the response includes ConsumedCapacity data
	// for tables and indexes. If set to INDEXES, the response includes ConsumedCapacity
	// for indexes. If set to NONE (the default), ConsumedCapacity is not included
	// in the response.
	ReturnConsumedCapacity *string `type:"string"`

	// A value that if set to SIZE, the response includes statistics about item
	// collections, if any, that were modified during the operation are returned
	// in the response. If set to NONE (the default), no statistics are returned.
	ReturnItemCollectionMetrics *string `type:"string"`

	// Use ReturnValues if you want to get the item attributes as they appeared
	// before they were deleted. For DeleteItem, the valid values are:
	//
	//   NONE - If ReturnValues is not specified, or if its value is NONE, then
	// nothing is returned. (This setting is the default for ReturnValues.)
	//
	//   ALL_OLD - The content of the old item is returned.
	ReturnValues *string `type:"string"`

	// The name of the table from which to delete the item.
	TableName *string `type:"string" required:"true"`
	// contains filtered or unexported fields
}

Represents the input of a DeleteItem operation.

type DeleteItemOutput 

type DeleteItemOutput struct {
	// A map of attribute names to AttributeValue objects, representing the item
	// as it appeared before the DeleteItem operation. This map appears in the response
	// only if ReturnValues was specified as ALL_OLD in the request.
	Attributes *map[string]*AttributeValue `type:"map"`

	// The capacity units consumed by an operation. The data returned includes the
	// total provisioned throughput consumed, along with statistics for the table
	// and any indexes involved in the operation. ConsumedCapacity is only returned
	// if the request asked for it. For more information, see Provisioned Throughput
	// (http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/ProvisionedThroughputIntro.html)
	// in the Amazon DynamoDB Developer Guide.
	ConsumedCapacity *ConsumedCapacity `type:"structure"`

	// Information about item collections, if any, that were affected by the operation.
	// ItemCollectionMetrics is only returned if the request asked for it. If the
	// table does not have any local secondary indexes, this information is not
	// returned in the response.
	//
	// Each ItemCollectionMetrics element consists of:
	//
	//  ItemCollectionKey - The hash key value of the item collection. This is
	// the same as the hash key of the item.
	//
	// SizeEstimateRange - An estimate of item collection size, in gigabytes. This
	// value is a two-element array containing a lower bound and an upper bound
	// for the estimate. The estimate includes the size of all the items in the
	// table, plus the size of all attributes projected into all of the local secondary
	// indexes on that table. Use this estimate to measure whether a local secondary
	// index is approaching its size limit.
	//
	// The estimate is subject to change over time; therefore, do not rely on the
	// precision or accuracy of the estimate.
	ItemCollectionMetrics *ItemCollectionMetrics `type:"structure"`
	// contains filtered or unexported fields
}

Represents the output of a DeleteItem operation.

type DeleteRequest 

type DeleteRequest struct {
	// A map of attribute name to attribute values, representing the primary key
	// of the item to delete. All of the table's primary key attributes must be
	// specified, and their data types must match those of the table's key schema.
	Key *map[string]*AttributeValue `type:"map" required:"true"`
	// contains filtered or unexported fields
}

Represents a request to perform a DeleteItem operation on an item.

type DeleteTableInput 

type DeleteTableInput struct {
	// The name of the table to delete.
	TableName *string `type:"string" required:"true"`
	// contains filtered or unexported fields
}

Represents the input of a DeleteTable operation.

type DeleteTableOutput 

type DeleteTableOutput struct {
	// Represents the properties of a table.
	TableDescription *TableDescription `type:"structure"`
	// contains filtered or unexported fields
}

Represents the output of a DeleteTable operation.

type DescribeTableInput 

type DescribeTableInput struct {
	// The name of the table to describe.
	TableName *string `type:"string" required:"true"`
	// contains filtered or unexported fields
}

Represents the input of a DescribeTable operation.

type DescribeTableOutput 

type DescribeTableOutput struct {
	// Represents the properties of a table.
	Table *TableDescription `type:"structure"`
	// contains filtered or unexported fields
}

Represents the output of a DescribeTable operation.

type DynamoDB 

type DynamoDB struct {
	*aws.Service
}

DynamoDB is a client for DynamoDB.

func New 

func New(config *aws.Config) *DynamoDB

New returns a new DynamoDB client.

func (*DynamoDB) BatchGetItem 

func (c *DynamoDB) BatchGetItem(input *BatchGetItemInput) (output *BatchGetItemOutput, err error)

The BatchGetItem operation returns the attributes of one or more items from one or more tables. You identify requested items by primary key.

A single operation can retrieve up to 16 MB of data, which can contain as many as 100 items. BatchGetItem will return a partial result if the response size limit is exceeded, the table's provisioned throughput is exceeded, or an internal processing failure occurs. If a partial result is returned, the operation returns a value for UnprocessedKeys. You can use this value to retry the operation starting with the next item to get.

For example, if you ask to retrieve 100 items, but each individual item is 300 KB in size, the system returns 52 items (so as not to exceed the 16 MB limit). It also returns an appropriate UnprocessedKeys value so you can get the next page of results. If desired, your application can include its own logic to assemble the pages of results into one data set.

If none of the items can be processed due to insufficient provisioned throughput on all of the tables in the request, then BatchGetItem will return a ProvisionedThroughputExceededException. If at least one of the items is successfully processed, then BatchGetItem completes successfully, while returning the keys of the unread items in UnprocessedKeys. 

If DynamoDB returns any unprocessed items, you should retry the batch operation

on those items. However, we strongly recommend that you use an exponential backoff algorithm. If you retry the batch operation immediately, the underlying read or write requests can still fail due to throttling on the individual tables. If you delay the batch operation using exponential backoff, the individual requests in the batch are much more likely to succeed.

For more information, go to Batch Operations and Error Handling (http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/ErrorHandling.html#BatchOperations) in the Amazon DynamoDB Developer Guide. 

By default, BatchGetItem performs eventually consistent reads on every

table in the request. If you want strongly consistent reads instead, you can set ConsistentRead to true for any or all tables.

In order to minimize response latency, BatchGetItem retrieves items in parallel.

When designing your application, keep in mind that DynamoDB does not return attributes in any particular order. To help parse the response by item, include the primary key values for the items in your request in the AttributesToGet parameter.

If a requested item does not exist, it is not returned in the result. Requests for nonexistent items consume the minimum read capacity units according to the type of read. For more information, see Capacity Units Calculations (http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/WorkingWithTables.html#CapacityUnitCalculations) in the Amazon DynamoDB Developer Guide.

func (*DynamoDB) BatchGetItemRequest 

func (c *DynamoDB) BatchGetItemRequest(input *BatchGetItemInput) (req *aws.Request, output *BatchGetItemOutput)

BatchGetItemRequest generates a request for the BatchGetItem operation.

func (*DynamoDB) BatchWriteItem 

func (c *DynamoDB) BatchWriteItem(input *BatchWriteItemInput) (output *BatchWriteItemOutput, err error)

The BatchWriteItem operation puts or deletes multiple items in one or more tables. A single call to BatchWriteItem can write up to 16 MB of data, which can comprise as many as 25 put or delete requests. Individual items to be written can be as large as 400 KB. 

BatchWriteItem cannot update items. To update items, use the UpdateItem

API. 

The individual PutItem and DeleteItem operations specified in BatchWriteItem

are atomic; however BatchWriteItem as a whole is not. If any requested operations fail because the table's provisioned throughput is exceeded or an internal processing failure occurs, the failed operations are returned in the UnprocessedItems response parameter. You can investigate and optionally resend the requests. Typically, you would call BatchWriteItem in a loop. Each iteration would check for unprocessed items and submit a new BatchWriteItem request with those unprocessed items until all items have been processed.

Note that if none of the items can be processed due to insufficient provisioned throughput on all of the tables in the request, then BatchWriteItem will return a ProvisionedThroughputExceededException. 

If DynamoDB returns any unprocessed items, you should retry the batch operation

on those items. However, we strongly recommend that you use an exponential backoff algorithm. If you retry the batch operation immediately, the underlying read or write requests can still fail due to throttling on the individual tables. If you delay the batch operation using exponential backoff, the individual requests in the batch are much more likely to succeed.

For more information, go to Batch Operations and Error Handling (http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/ErrorHandling.html#BatchOperations) in the Amazon DynamoDB Developer Guide. 

With BatchWriteItem, you can efficiently write or delete large amounts

of data, such as from Amazon Elastic MapReduce (EMR), or copy data from another database into DynamoDB. In order to improve performance with these large-scale operations, BatchWriteItem does not behave in the same way as individual PutItem and DeleteItem calls would. For example, you cannot specify conditions on individual put and delete requests, and BatchWriteItem does not return deleted items in the response.

If you use a programming language that supports concurrency, such as Java, you can use threads to write items in parallel. Your application must include the necessary logic to manage the threads. With languages that don't support threading, such as PHP, you must update provides an alternative where the API performs the specified put and delete operations in parallel, giving you the power of the thread pool approach without having to introduce complexity into your application.

Parallel processing reduces latency, but each specified put and delete request consumes the same number of write capacity units whether it is processed in parallel or not. Delete operations on nonexistent items consume one write capacity unit.

If one or more of the following is true, DynamoDB rejects the entire batch write operation: 

One or more tables specified in the BatchWriteItem request does not exist.

Primary key attributes specified on an item in the request do not match

those in the corresponding table's primary key schema. 

You try to perform multiple operations on the same item in the same BatchWriteItem

request. For example, you cannot put and delete the same item in the same BatchWriteItem request. 

There are more than 25 requests in the batch.

Any individual item in a batch exceeds 400 KB.

The total request size exceeds 16 MB.

func (*DynamoDB) BatchWriteItemRequest 

func (c *DynamoDB) BatchWriteItemRequest(input *BatchWriteItemInput) (req *aws.Request, output *BatchWriteItemOutput)

BatchWriteItemRequest generates a request for the BatchWriteItem operation.

func (*DynamoDB) CreateTable 

func (c *DynamoDB) CreateTable(input *CreateTableInput) (output *CreateTableOutput, err error)

The CreateTable operation adds a new table to your account. In an AWS account, table names must be unique within each region. That is, you can have two tables with same name if you create the tables in different regions.

CreateTable is an asynchronous operation. Upon receiving a CreateTable request, DynamoDB immediately returns a response with a TableStatus of CREATING. After the table is created, DynamoDB sets the TableStatus to ACTIVE. You can perform read and write operations only on an ACTIVE table.

You can optionally define secondary indexes on the new table, as part of the CreateTable operation. If you want to create multiple tables with secondary indexes on them, you must create the tables sequentially. Only one table with secondary indexes can be in the CREATING state at any given time.

You can use the DescribeTable API to check the table status.

func (*DynamoDB) CreateTableRequest 

func (c *DynamoDB) CreateTableRequest(input *CreateTableInput) (req *aws.Request, output *CreateTableOutput)

CreateTableRequest generates a request for the CreateTable operation.

func (*DynamoDB) DeleteItem 

func (c *DynamoDB) DeleteItem(input *DeleteItemInput) (output *DeleteItemOutput, err error)

Deletes a single item in a table by primary key. You can perform a conditional delete operation that deletes the item if it exists, or if it has an expected attribute value.

In addition to deleting an item, you can also return the item's attribute values in the same operation, using the ReturnValues parameter.

Unless you specify conditions, the DeleteItem is an idempotent operation; running it multiple times on the same item or attribute does not result in an error response.

Conditional deletes are useful for deleting items only if specific conditions are met. If those conditions are met, DynamoDB performs the delete. Otherwise, the item is not deleted.

func (*DynamoDB) DeleteItemRequest 

func (c *DynamoDB) DeleteItemRequest(input *DeleteItemInput) (req *aws.Request, output *DeleteItemOutput)

DeleteItemRequest generates a request for the DeleteItem operation.

func (*DynamoDB) DeleteTable 

func (c *DynamoDB) DeleteTable(input *DeleteTableInput) (output *DeleteTableOutput, err error)

The DeleteTable operation deletes a table and all of its items. After a DeleteTable request, the specified table is in the DELETING state until DynamoDB completes the deletion. If the table is in the ACTIVE state, you can delete it. If a table is in CREATING or UPDATING states, then DynamoDB returns a ResourceInUseException. If the specified table does not exist, DynamoDB returns a ResourceNotFoundException. If table is already in the DELETING state, no error is returned. 

DynamoDB might continue to accept data read and write operations, such

as GetItem and PutItem, on a table in the DELETING state until the table deletion is complete. 

When you delete a table, any indexes on that table are also deleted.

Use the DescribeTable API to check the status of the table.

func (*DynamoDB) DeleteTableRequest 

func (c *DynamoDB) DeleteTableRequest(input *DeleteTableInput) (req *aws.Request, output *DeleteTableOutput)

DeleteTableRequest generates a request for the DeleteTable operation.

func (*DynamoDB) DescribeTable 

func (c *DynamoDB) DescribeTable(input *DescribeTableInput) (output *DescribeTableOutput, err error)

Returns information about the table, including the current status of the table, when it was created, the primary key schema, and any indexes on the table. 

If you issue a DescribeTable request immediately after a CreateTable request,

DynamoDB might return a ResourceNotFoundException. This is because DescribeTable uses an eventually consistent query, and the metadata for your table might not be available at that moment. Wait for a few seconds, and then try the DescribeTable request again.

func (*DynamoDB) DescribeTableRequest 

func (c *DynamoDB) DescribeTableRequest(input *DescribeTableInput) (req *aws.Request, output *DescribeTableOutput)

DescribeTableRequest generates a request for the DescribeTable operation.

func (*DynamoDB) GetItem 

func (c *DynamoDB) GetItem(input *GetItemInput) (output *GetItemOutput, err error)

The GetItem operation returns a set of attributes for the item with the given primary key. If there is no matching item, GetItem does not return any data.

GetItem provides an eventually consistent read by default. If your application requires a strongly consistent read, set ConsistentRead to true. Although a strongly consistent read might take more time than an eventually consistent read, it always returns the last updated value.

func (*DynamoDB) GetItemRequest 

func (c *DynamoDB) GetItemRequest(input *GetItemInput) (req *aws.Request, output *GetItemOutput)

GetItemRequest generates a request for the GetItem operation.

func (*DynamoDB) ListTables 

func (c *DynamoDB) ListTables(input *ListTablesInput) (output *ListTablesOutput, err error)

Returns an array of table names associated with the current account and endpoint. The output from ListTables is paginated, with each page returning a maximum of 100 table names.

func (*DynamoDB) ListTablesRequest 

func (c *DynamoDB) ListTablesRequest(input *ListTablesInput) (req *aws.Request, output *ListTablesOutput)

ListTablesRequest generates a request for the ListTables operation.

func (*DynamoDB) PutItem 

func (c *DynamoDB) PutItem(input *PutItemInput) (output *PutItemOutput, err error)

Creates a new item, or replaces an old item with a new item. If an item that has the same primary key as the new item already exists in the specified table, the new item completely replaces the existing item. You can perform a conditional put operation (add a new item if one with the specified primary key doesn't exist), or replace an existing item if it has certain attribute values.

In addition to putting an item, you can also return the item's attribute values in the same operation, using the ReturnValues parameter.

When you add an item, the primary key attribute(s) are the only required attributes. Attribute values cannot be null. String and Binary type attributes must have lengths greater than zero. Set type attributes cannot be empty. Requests with empty values will be rejected with a ValidationException exception.

You can request that PutItem return either a copy of the original item (before the update) or a copy of the updated item (after the update). For more information, see the ReturnValues description below. 

To prevent a new item from replacing an existing item, use a conditional

put operation with ComparisonOperator set to NULL for the primary key attribute, or attributes. 

For more information about using this API, see Working with Items (http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/WorkingWithItems.html)

in the Amazon DynamoDB Developer Guide.

func (*DynamoDB) PutItemRequest 

func (c *DynamoDB) PutItemRequest(input *PutItemInput) (req *aws.Request, output *PutItemOutput)

PutItemRequest generates a request for the PutItem operation.

func (*DynamoDB) Query 

func (c *DynamoDB) Query(input *QueryInput) (output *QueryOutput, err error)

A Query operation directly accesses items from a table using the table primary key, or from an index using the index key. You must provide a specific hash key value. You can narrow the scope of the query by using comparison operators on the range key value, or on the index key. You can use the ScanIndexForward parameter to get results in forward or reverse order, by range key or by index key.

Queries that do not return results consume the minimum number of read capacity units for that type of read operation.

If the total number of items meeting the query criteria exceeds the result set size limit of 1 MB, the query stops and results are returned to the user with LastEvaluatedKey to continue the query in a subsequent operation. Unlike a Scan operation, a Query operation never returns both an empty result set and a LastEvaluatedKey. The LastEvaluatedKey is only provided if the results exceed 1 MB, or if you have used Limit.

You can query a table, a local secondary index, or a global secondary index. For a query on a table or on a local secondary index, you can set ConsistentRead to true and obtain a strongly consistent result. Global secondary indexes support eventually consistent reads only, so do not specify ConsistentRead when querying a global secondary index.

func (*DynamoDB) QueryRequest 

func (c *DynamoDB) QueryRequest(input *QueryInput) (req *aws.Request, output *QueryOutput)

QueryRequest generates a request for the Query operation.

func (*DynamoDB) Scan 

func (c *DynamoDB) Scan(input *ScanInput) (output *ScanOutput, err error)

The Scan operation returns one or more items and item attributes by accessing every item in a table or a secondary index. To have DynamoDB return fewer items, you can provide a ScanFilter operation.

If the total number of scanned items exceeds the maximum data set size limit of 1 MB, the scan stops and results are returned to the user as a LastEvaluatedKey value to continue the scan in a subsequent operation. The results also include the number of items exceeding the limit. A scan can result in no table data meeting the filter criteria.

The result set is eventually consistent.

By default, Scan operations proceed sequentially; however, for faster performance on a large table or secondary index, applications can request a parallel Scan operation by providing the Segment and TotalSegments parameters. For more information, see Parallel Scan (http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/QueryAndScan.html#QueryAndScanParallelScan) in the Amazon DynamoDB Developer Guide.

func (*DynamoDB) ScanRequest 

func (c *DynamoDB) ScanRequest(input *ScanInput) (req *aws.Request, output *ScanOutput)

ScanRequest generates a request for the Scan operation.

func (*DynamoDB) UpdateItem 

func (c *DynamoDB) UpdateItem(input *UpdateItemInput) (output *UpdateItemOutput, err error)

Edits an existing item's attributes, or adds a new item to the table if it does not already exist. You can put, delete, or add attribute values. You can also perform a conditional update on an existing item (insert a new attribute name-value pair if it doesn't exist, or replace an existing name-value pair if it has certain expected attribute values). If conditions are specified and the item does not exist, then the operation fails and a new item is not created.

You can also return the item's attribute values in the same UpdateItem operation using the ReturnValues parameter.

func (*DynamoDB) UpdateItemRequest 

func (c *DynamoDB) UpdateItemRequest(input *UpdateItemInput) (req *aws.Request, output *UpdateItemOutput)

UpdateItemRequest generates a request for the UpdateItem operation.

func (*DynamoDB) UpdateTable 

func (c *DynamoDB) UpdateTable(input *UpdateTableInput) (output *UpdateTableOutput, err error)

Updates the provisioned throughput for the given table, or manages the global secondary indexes on the table.

You can increase or decrease the table's provisioned throughput values within the maximums and minimums listed in the Limits (http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Limits.html) section in the Amazon DynamoDB Developer Guide.

In addition, you can use UpdateTable to add, modify or delete global secondary indexes on the table. For more information, see Managing Global Secondary Indexes (http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/GSI.OnlineOps.html) in the Amazon DynamoDB Developer Guide.

The table must be in the ACTIVE state for UpdateTable to succeed. UpdateTable is an asynchronous operation; while executing the operation, the table is in the UPDATING state. While the table is in the UPDATING state, the table still has the provisioned throughput from before the call. The table's new provisioned throughput settings go into effect when the table returns to the ACTIVE state; at that point, the UpdateTable operation is complete.

func (*DynamoDB) UpdateTableRequest 

func (c *DynamoDB) UpdateTableRequest(input *UpdateTableInput) (req *aws.Request, output *UpdateTableOutput)

UpdateTableRequest generates a request for the UpdateTable operation.

type ExpectedAttributeValue 

type ExpectedAttributeValue struct {
	// One or more values to evaluate against the supplied attribute. The number
	// of values in the list depends on the ComparisonOperator being used.
	//
	// For type Number, value comparisons are numeric.
	//
	// String value comparisons for greater than, equals, or less than are based
	// on ASCII character code values. For example, a is greater than A, and a is
	// greater than B. For a list of code values, see http://en.wikipedia.org/wiki/ASCII#ASCII_printable_characters
	// (http://en.wikipedia.org/wiki/ASCII#ASCII_printable_characters).
	//
	// For Binary, DynamoDB treats each byte of the binary data as unsigned when
	// it compares binary values.
	//
	// For information on specifying data types in JSON, see JSON Data Format (http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/DataFormat.html)
	// in the Amazon DynamoDB Developer Guide.
	AttributeValueList []*AttributeValue `type:"list"`

	// A comparator for evaluating attributes in the AttributeValueList. For example,
	// equals, greater than, less than, etc.
	//
	// The following comparison operators are available:
	//
	// EQ | NE | LE | LT | GE | GT | NOT_NULL | NULL | CONTAINS | NOT_CONTAINS
	// | BEGINS_WITH | IN | BETWEEN
	//
	// The following are descriptions of each comparison operator.
	//
	//   EQ : Equal. EQ is supported for all datatypes, including lists and maps.
	//
	// AttributeValueList can contain only one AttributeValue element of type String,
	// Number, Binary, String Set, Number Set, or Binary Set. If an item contains
	// an AttributeValue element of a different type than the one provided in the
	// request, the value does not match. For example, {"S":"6"} does not equal
	// {"N":"6"}. Also, {"N":"6"} does not equal {"NS":["6", "2", "1"]}.
	//
	//    NE : Not equal. NE is supported for all datatypes, including lists and
	// maps.
	//
	// AttributeValueList can contain only one AttributeValue of type String, Number,
	// Binary, String Set, Number Set, or Binary Set. If an item contains an AttributeValue
	// of a different type than the one provided in the request, the value does
	// not match. For example, {"S":"6"} does not equal {"N":"6"}. Also, {"N":"6"}
	// does not equal {"NS":["6", "2", "1"]}.
	//
	//    LE : Less than or equal.
	//
	// AttributeValueList can contain only one AttributeValue element of type String,
	// Number, or Binary (not a set type). If an item contains an AttributeValue
	// element of a different type than the one provided in the request, the value
	// does not match. For example, {"S":"6"} does not equal {"N":"6"}. Also, {"N":"6"}
	// does not compare to {"NS":["6", "2", "1"]}.
	//
	//    LT : Less than.
	//
	// AttributeValueList can contain only one AttributeValue of type String, Number,
	// or Binary (not a set type). If an item contains an AttributeValue element
	// of a different type than the one provided in the request, the value does
	// not match. For example, {"S":"6"} does not equal {"N":"6"}. Also, {"N":"6"}
	// does not compare to {"NS":["6", "2", "1"]}.
	//
	//    GE : Greater than or equal.
	//
	// AttributeValueList can contain only one AttributeValue element of type String,
	// Number, or Binary (not a set type). If an item contains an AttributeValue
	// element of a different type than the one provided in the request, the value
	// does not match. For example, {"S":"6"} does not equal {"N":"6"}. Also, {"N":"6"}
	// does not compare to {"NS":["6", "2", "1"]}.
	//
	//    GT : Greater than.
	//
	// AttributeValueList can contain only one AttributeValue element of type String,
	// Number, or Binary (not a set type). If an item contains an AttributeValue
	// element of a different type than the one provided in the request, the value
	// does not match. For example, {"S":"6"} does not equal {"N":"6"}. Also, {"N":"6"}
	// does not compare to {"NS":["6", "2", "1"]}.
	//
	//    NOT_NULL : The attribute exists. NOT_NULL is supported for all datatypes,
	// including lists and maps.
	//
	// This operator tests for the existence of an attribute, not its data type.
	// If the data type of attribute "a" is null, and you evaluate it using NOT_NULL,
	// the result is a Boolean true. This result is because the attribute "a" exists;
	// its data type is not relevant to the NOT_NULL comparison operator.
	//
	//    NULL : The attribute does not exist. NULL is supported for all datatypes,
	// including lists and maps.
	//
	// This operator tests for the nonexistence of an attribute, not its data type.
	// If the data type of attribute "a" is null, and you evaluate it using NULL,
	// the result is a Boolean false. This is because the attribute "a" exists;
	// its data type is not relevant to the NULL comparison operator.
	//
	//    CONTAINS : Checks for a subsequence, or value in a set.
	//
	// AttributeValueList can contain only one AttributeValue element of type String,
	// Number, or Binary (not a set type). If the target attribute of the comparison
	// is of type String, then the operator checks for a substring match. If the
	// target attribute of the comparison is of type Binary, then the operator looks
	// for a subsequence of the target that matches the input. If the target attribute
	// of the comparison is a set ("SS", "NS", or "BS"), then the operator evaluates
	// to true if it finds an exact match with any member of the set.
	//
	// CONTAINS is supported for lists: When evaluating "a CONTAINS b", "a" can
	// be a list; however, "b" cannot be a set, a map, or a list.
	//
	//   NOT_CONTAINS : Checks for absence of a subsequence, or absence of a value
	// in a set.
	//
	// AttributeValueList can contain only one AttributeValue element of type String,
	// Number, or Binary (not a set type). If the target attribute of the comparison
	// is a String, then the operator checks for the absence of a substring match.
	// If the target attribute of the comparison is Binary, then the operator checks
	// for the absence of a subsequence of the target that matches the input. If
	// the target attribute of the comparison is a set ("SS", "NS", or "BS"), then
	// the operator evaluates to true if it does not find an exact match with any
	// member of the set.
	//
	// NOT_CONTAINS is supported for lists: When evaluating "a NOT CONTAINS b",
	// "a" can be a list; however, "b" cannot be a set, a map, or a list.
	//
	//   BEGINS_WITH : Checks for a prefix.
	//
	// AttributeValueList can contain only one AttributeValue of type String or
	// Binary (not a Number or a set type). The target attribute of the comparison
	// must be of type String or Binary (not a Number or a set type).
	//
	//    IN : Checks for matching elements within two sets.
	//
	// AttributeValueList can contain one or more AttributeValue elements of type
	// String, Number, or Binary (not a set type). These attributes are compared
	// against an existing set type attribute of an item. If any elements of the
	// input set are present in the item attribute, the expression evaluates to
	// true.
	//
	//   BETWEEN : Greater than or equal to the first value, and less than or equal
	// to the second value.
	//
	// AttributeValueList must contain two AttributeValue elements of the same
	// type, either String, Number, or Binary (not a set type). A target attribute
	// matches if the target value is greater than, or equal to, the first element
	// and less than, or equal to, the second element. If an item contains an AttributeValue
	// element of a different type than the one provided in the request, the value
	// does not match. For example, {"S":"6"} does not compare to {"N":"6"}. Also,
	// {"N":"6"} does not compare to {"NS":["6", "2", "1"]}
	ComparisonOperator *string `type:"string"`

	// Causes DynamoDB to evaluate the value before attempting a conditional operation:
	//
	//   If Exists is true, DynamoDB will check to see if that attribute value
	// already exists in the table. If it is found, then the operation succeeds.
	// If it is not found, the operation fails with a ConditionalCheckFailedException.
	//
	//   If Exists is false, DynamoDB assumes that the attribute value does not
	// exist in the table. If in fact the value does not exist, then the assumption
	// is valid and the operation succeeds. If the value is found, despite the assumption
	// that it does not exist, the operation fails with a ConditionalCheckFailedException.
	//
	//   The default setting for Exists is true. If you supply a Value all by itself,
	// DynamoDB assumes the attribute exists: You don't have to set Exists to true,
	// because it is implied.
	//
	// DynamoDB returns a ValidationException if:
	//
	//   Exists is true but there is no Value to check. (You expect a value to
	// exist, but don't specify what that value is.)
	//
	//   Exists is false but you also provide a Value. (You cannot expect an attribute
	// to have a value, while also expecting it not to exist.)
	Exists *bool `type:"boolean"`

	// Represents the data for an attribute. You can set one, and only one, of the
	// elements.
	//
	// Each attribute in an item is a name-value pair. An attribute can be single-valued
	// or multi-valued set. For example, a book item can have title and authors
	// attributes. Each book has one title but can have many authors. The multi-valued
	// attribute is a set; duplicate values are not allowed.
	Value *AttributeValue `type:"structure"`
	// contains filtered or unexported fields
}

Represents a condition to be compared with an attribute value. This condition can be used with DeleteItem, PutItem or UpdateItem operations; if the comparison evaluates to true, the operation succeeds; if not, the operation fails. You can use ExpectedAttributeValue in one of two different ways: 

Use AttributeValueList to specify one or more values to compare against

an attribute. Use ComparisonOperator to specify how you want to perform the comparison. If the comparison evaluates to true, then the conditional operation succeeds. 

>Use Value to specify a value that DynamoDB will compare against an attribute.

If the values match, then ExpectedAttributeValue evaluates to true and the conditional operation succeeds. Optionally, you can also set Exists to false, indicating that you do not expect to find the attribute value in the table. In this case, the conditional operation succeeds only if the comparison evaluates to false. 

Value and Exists are incompatible with AttributeValueList and ComparisonOperator.

Note that if you use both sets of parameters at once, DynamoDB will return a ValidationException exception.

type GetItemInput 

type GetItemInput struct {
	// There is a newer parameter available. Use ProjectionExpression instead. Note
	// that if you use AttributesToGet and ProjectionExpression at the same time,
	// DynamoDB will return a ValidationException exception.
	//
	// This parameter allows you to retrieve attributes of type List or Map; however,
	// it cannot retrieve individual elements within a List or a Map.
	//
	// The names of one or more attributes to retrieve. If no attribute names are
	// provided, then all attributes will be returned. If any of the requested attributes
	// are not found, they will not appear in the result.
	//
	// Note that AttributesToGet has no effect on provisioned throughput consumption.
	// DynamoDB determines capacity units consumed based on item size, not on the
	// amount of data that is returned to an application.
	AttributesToGet []*string `type:"list"`

	// A value that if set to true, then the operation uses strongly consistent
	// reads; otherwise, eventually consistent reads are used.
	ConsistentRead *bool `type:"boolean"`

	// One or more substitution tokens for attribute names in an expression. The
	// following are some use cases for using ExpressionAttributeNames:
	//
	//   To access an attribute whose name conflicts with a DynamoDB reserved word.
	//
	//   To create a placeholder for repeating occurrences of an attribute name
	// in an expression.
	//
	//   To prevent special characters in an attribute name from being misinterpreted
	// in an expression.
	//
	//   Use the # character in an expression to dereference an attribute name.
	// For example, consider the following attribute name:
	//
	// Percentile
	//
	// The name of this attribute conflicts with a reserved word, so it cannot
	// be used directly in an expression. (For the complete list of reserved words,
	// go to Reserved Words (http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/ReservedWords.html)
	// in the Amazon DynamoDB Developer Guide). To work around this, you could specify
	// the following for ExpressionAttributeNames:
	//
	// {"#P":"Percentile"}
	//
	// You could then use this substitution in an expression, as in this example:
	//
	// #P = :val
	//
	// Tokens that begin with the : character are expression attribute values,
	// which are placeholders for the actual value at runtime.
	//
	// For more information on expression attribute names, go to Accessing Item
	// Attributes (http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Expressions.AccessingItemAttributes.html)
	// in the Amazon DynamoDB Developer Guide.
	ExpressionAttributeNames *map[string]*string `type:"map"`

	// A map of attribute names to AttributeValue objects, representing the primary
	// key of the item to retrieve.
	//
	// For the primary key, you must provide all of the attributes. For example,
	// with a hash type primary key, you only need to provide the hash attribute.
	// For a hash-and-range type primary key, you must provide both the hash attribute
	// and the range attribute.
	Key *map[string]*AttributeValue `type:"map" required:"true"`

	// A string that identifies one or more attributes to retrieve from the table.
	// These attributes can include scalars, sets, or elements of a JSON document.
	// The attributes in the expression must be separated by commas.
	//
	// If no attribute names are specified, then all attributes will be returned.
	// If any of the requested attributes are not found, they will not appear in
	// the result.
	//
	// For more information, go to Accessing Item Attributes (http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Expressions.AccessingItemAttributes.html)
	// in the Amazon DynamoDB Developer Guide.
	ProjectionExpression *string `type:"string"`

	// A value that if set to TOTAL, the response includes ConsumedCapacity data
	// for tables and indexes. If set to INDEXES, the response includes ConsumedCapacity
	// for indexes. If set to NONE (the default), ConsumedCapacity is not included
	// in the response.
	ReturnConsumedCapacity *string `type:"string"`

	// The name of the table containing the requested item.
	TableName *string `type:"string" required:"true"`
	// contains filtered or unexported fields
}

Represents the input of a GetItem operation.

type GetItemOutput 

type GetItemOutput struct {
	// The capacity units consumed by an operation. The data returned includes the
	// total provisioned throughput consumed, along with statistics for the table
	// and any indexes involved in the operation. ConsumedCapacity is only returned
	// if the request asked for it. For more information, see Provisioned Throughput
	// (http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/ProvisionedThroughputIntro.html)
	// in the Amazon DynamoDB Developer Guide.
	ConsumedCapacity *ConsumedCapacity `type:"structure"`

	// A map of attribute names to AttributeValue objects, as specified by AttributesToGet.
	Item *map[string]*AttributeValue `type:"map"`
	// contains filtered or unexported fields
}

Represents the output of a GetItem operation.

type GlobalSecondaryIndex 

type GlobalSecondaryIndex struct {
	// The name of the global secondary index. The name must be unique among all
	// other indexes on this table.
	IndexName *string `type:"string" required:"true"`

	// The complete key schema for a global secondary index, which consists of one
	// or more pairs of attribute names and key types (HASH or RANGE).
	KeySchema []*KeySchemaElement `type:"list" required:"true"`

	// Represents attributes that are copied (projected) from the table into an
	// index. These are in addition to the primary key attributes and index key
	// attributes, which are automatically projected.
	Projection *Projection `type:"structure" required:"true"`

	// Represents the provisioned throughput settings for a specified table or index.
	// The settings can be modified using the UpdateTable operation.
	//
	// For current minimum and maximum provisioned throughput values, see Limits
	// (http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Limits.html)
	// in the Amazon DynamoDB Developer Guide.
	ProvisionedThroughput *ProvisionedThroughput `type:"structure" required:"true"`
	// contains filtered or unexported fields
}

Represents the properties of a global secondary index.

type GlobalSecondaryIndexDescription 

type GlobalSecondaryIndexDescription struct {
	// Indicates whether the index is currently backfilling. Backfilling is the
	// process of reading items from the table and determining whether they can
	// be added to the index. (Not all items will qualify: For example, a hash key
	// attribute cannot have any duplicates.) If an item can be added to the index,
	// DynamoDB will do so. After all items have been processed, the backfilling
	// operation is complete and Backfilling is false.
	//
	// For indexes that were created during a CreateTable operation, the Backfilling
	// attribute does not appear in the DescribeTable output.
	Backfilling *bool `type:"boolean"`

	// The name of the global secondary index.
	IndexName *string `type:"string"`

	// The total size of the specified index, in bytes. DynamoDB updates this value
	// approximately every six hours. Recent changes might not be reflected in this
	// value.
	IndexSizeBytes *int64 `type:"long"`

	// The current state of the global secondary index:
	//
	//   CREATING - The index is being created.
	//
	//   UPDATING - The index is being updated.
	//
	//   DELETING - The index is being deleted.
	//
	//   ACTIVE - The index is ready for use.
	IndexStatus *string `type:"string"`

	// The number of items in the specified index. DynamoDB updates this value approximately
	// every six hours. Recent changes might not be reflected in this value.
	ItemCount *int64 `type:"long"`

	// The complete key schema for the global secondary index, consisting of one
	// or more pairs of attribute names and key types (HASH or RANGE).
	KeySchema []*KeySchemaElement `type:"list"`

	// Represents attributes that are copied (projected) from the table into an
	// index. These are in addition to the primary key attributes and index key
	// attributes, which are automatically projected.
	Projection *Projection `type:"structure"`

	// Represents the provisioned throughput settings for the table, consisting
	// of read and write capacity units, along with data about increases and decreases.
	ProvisionedThroughput *ProvisionedThroughputDescription `type:"structure"`
	// contains filtered or unexported fields
}

Represents the properties of a global secondary index.

type GlobalSecondaryIndexUpdate 

type GlobalSecondaryIndexUpdate struct {
	// The parameters required for creating a global secondary index on an existing
	// table:
	//
	//  IndexName
	//
	// KeySchema
	//
	// AttributeDefinitions
	//
	// Projection
	//
	// ProvisionedThroughput
	Create *CreateGlobalSecondaryIndexAction `type:"structure"`

	// The name of an existing global secondary index to be removed.
	Delete *DeleteGlobalSecondaryIndexAction `type:"structure"`

	// The name of an existing global secondary index, along with new provisioned
	// throughput settings to be applied to that index.
	Update *UpdateGlobalSecondaryIndexAction `type:"structure"`
	// contains filtered or unexported fields
}

Represents one of the following: 

A new global secondary index to be added to an existing table.

New provisioned throughput parameters for an existing global secondary index.

An existing global secondary index to be removed from an existing table.

type ItemCollectionMetrics 

type ItemCollectionMetrics struct {
	// The hash key value of the item collection. This value is the same as the
	// hash key of the item.
	ItemCollectionKey *map[string]*AttributeValue `type:"map"`

	// An estimate of item collection size, in gigabytes. This value is a two-element
	// array containing a lower bound and an upper bound for the estimate. The estimate
	// includes the size of all the items in the table, plus the size of all attributes
	// projected into all of the local secondary indexes on that table. Use this
	// estimate to measure whether a local secondary index is approaching its size
	// limit.
	//
	// The estimate is subject to change over time; therefore, do not rely on the
	// precision or accuracy of the estimate.
	SizeEstimateRangeGB []*float64 `type:"list"`
	// contains filtered or unexported fields
}

Information about item collections, if any, that were affected by the operation. ItemCollectionMetrics is only returned if the request asked for it. If the table does not have any local secondary indexes, this information is not returned in the response.

type KeySchemaElement 

type KeySchemaElement struct {
	// The name of a key attribute.
	AttributeName *string `type:"string" required:"true"`

	// The attribute data, consisting of the data type and the attribute value itself.
	KeyType *string `type:"string" required:"true"`
	// contains filtered or unexported fields
}

Represents a single element of a key schema. A key schema specifies the attributes that make up the primary key of a table, or the key attributes of an index.

A KeySchemaElement represents exactly one attribute of the primary key. For example, a hash type primary key would be represented by one KeySchemaElement. A hash-and-range type primary key would require one KeySchemaElement for the hash attribute, and another KeySchemaElement for the range attribute.

type KeysAndAttributes 

type KeysAndAttributes struct {
	// One or more attributes to retrieve from the table or index. If no attribute
	// names are specified then all attributes will be returned. If any of the specified
	// attributes are not found, they will not appear in the result.
	AttributesToGet []*string `type:"list"`

	// The consistency of a read operation. If set to true, then a strongly consistent
	// read is used; otherwise, an eventually consistent read is used.
	ConsistentRead *bool `type:"boolean"`

	// One or more substitution tokens for attribute names in an expression. The
	// following are some use cases for using ExpressionAttributeNames:
	//
	//   To access an attribute whose name conflicts with a DynamoDB reserved word.
	//
	//   To create a placeholder for repeating occurrences of an attribute name
	// in an expression.
	//
	//   To prevent special characters in an attribute name from being misinterpreted
	// in an expression.
	//
	//   Use the # character in an expression to dereference an attribute name.
	// For example, consider the following attribute name:
	//
	// Percentile
	//
	// The name of this attribute conflicts with a reserved word, so it cannot
	// be used directly in an expression. (For the complete list of reserved words,
	// go to Reserved Words (http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/ReservedWords.html)
	// in the Amazon DynamoDB Developer Guide). To work around this, you could specify
	// the following for ExpressionAttributeNames:
	//
	// {"#P":"Percentile"}
	//
	// You could then use this substitution in an expression, as in this example:
	//
	// #P = :val
	//
	// Tokens that begin with the : character are expression attribute values,
	// which are placeholders for the actual value at runtime.
	//
	// For more information on expression attribute names, go to Accessing Item
	// Attributes (http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Expressions.AccessingItemAttributes.html)
	// in the Amazon DynamoDB Developer Guide.
	ExpressionAttributeNames *map[string]*string `type:"map"`

	// The primary key attribute values that define the items and the attributes
	// associated with the items.
	Keys []*map[string]*AttributeValue `type:"list" required:"true"`

	// A string that identifies one or more attributes to retrieve from the table.
	// These attributes can include scalars, sets, or elements of a JSON document.
	// The attributes in the ProjectionExpression must be separated by commas.
	//
	// If no attribute names are specified, then all attributes will be returned.
	// If any of the requested attributes are not found, they will not appear in
	// the result.
	//
	// For more information, go to Accessing Item Attributes (http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Expressions.AccessingItemAttributes.html)
	// in the Amazon DynamoDB Developer Guide.
	ProjectionExpression *string `type:"string"`
	// contains filtered or unexported fields
}

Represents a set of primary keys and, for each key, the attributes to retrieve from the table.

For each primary key, you must provide all of the key attributes. For example, with a hash type primary key, you only need to provide the hash attribute. For a hash-and-range type primary key, you must provide both the hash attribute and the range attribute.

type ListTablesInput 

type ListTablesInput struct {
	// The first table name that this operation will evaluate. Use the value that
	// was returned for LastEvaluatedTableName in a previous operation, so that
	// you can obtain the next page of results.
	ExclusiveStartTableName *string `type:"string"`

	// A maximum number of table names to return. If this parameter is not specified,
	// the limit is 100.
	Limit *int64 `type:"integer"`
	// contains filtered or unexported fields
}

Represents the input of a ListTables operation.

type ListTablesOutput 

type ListTablesOutput struct {
	// The name of the last table in the current page of results. Use this value
	// as the ExclusiveStartTableName in a new request to obtain the next page of
	// results, until all the table names are returned.
	//
	// If you do not receive a LastEvaluatedTableName value in the response, this
	// means that there are no more table names to be retrieved.
	LastEvaluatedTableName *string `type:"string"`

	// The names of the tables associated with the current account at the current
	// endpoint. The maximum size of this array is 100.
	//
	// If LastEvaluatedTableName also appears in the output, you can use this value
	// as the ExclusiveStartTableName parameter in a subsequent ListTables request
	// and obtain the next page of results.
	TableNames []*string `type:"list"`
	// contains filtered or unexported fields
}

Represents the output of a ListTables operation.

type LocalSecondaryIndex 

type LocalSecondaryIndex struct {
	// The name of the local secondary index. The name must be unique among all
	// other indexes on this table.
	IndexName *string `type:"string" required:"true"`

	// The complete key schema for the local secondary index, consisting of one
	// or more pairs of attribute names and key types (HASH or RANGE).
	KeySchema []*KeySchemaElement `type:"list" required:"true"`

	// Represents attributes that are copied (projected) from the table into an
	// index. These are in addition to the primary key attributes and index key
	// attributes, which are automatically projected.
	Projection *Projection `type:"structure" required:"true"`
	// contains filtered or unexported fields
}

Represents the properties of a local secondary index.

type LocalSecondaryIndexDescription 

type LocalSecondaryIndexDescription struct {
	// Represents the name of the local secondary index.
	IndexName *string `type:"string"`

	// The total size of the specified index, in bytes. DynamoDB updates this value
	// approximately every six hours. Recent changes might not be reflected in this
	// value.
	IndexSizeBytes *int64 `type:"long"`

	// The number of items in the specified index. DynamoDB updates this value approximately
	// every six hours. Recent changes might not be reflected in this value.
	ItemCount *int64 `type:"long"`

	// The complete index key schema, which consists of one or more pairs of attribute
	// names and key types (HASH or RANGE).
	KeySchema []*KeySchemaElement `type:"list"`

	// Represents attributes that are copied (projected) from the table into an
	// index. These are in addition to the primary key attributes and index key
	// attributes, which are automatically projected.
	Projection *Projection `type:"structure"`
	// contains filtered or unexported fields
}

Represents the properties of a local secondary index.

type Projection 

type Projection struct {
	// Represents the non-key attribute names which will be projected into the index.
	//
	// For local secondary indexes, the total count of NonKeyAttributes summed
	// across all of the local secondary indexes, must not exceed 20. If you project
	// the same attribute into two different indexes, this counts as two distinct
	// attributes when determining the total.
	NonKeyAttributes []*string `type:"list"`

	// The set of attributes that are projected into the index:
	//
	//   KEYS_ONLY - Only the index and primary keys are projected into the index.
	//
	//   INCLUDE - Only the specified table attributes are projected into the index.
	// The list of projected attributes are in NonKeyAttributes.
	//
	//   ALL - All of the table attributes are projected into the index.
	ProjectionType *string `type:"string"`
	// contains filtered or unexported fields
}

Represents attributes that are copied (projected) from the table into an index. These are in addition to the primary key attributes and index key attributes, which are automatically projected.

type ProvisionedThroughput 

type ProvisionedThroughput struct {
	// The maximum number of strongly consistent reads consumed per second before
	// DynamoDB returns a ThrottlingException. For more information, see Specifying
	// Read and Write Requirements (http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/WorkingWithTables.html#ProvisionedThroughput)
	// in the Amazon DynamoDB Developer Guide.
	ReadCapacityUnits *int64 `type:"long" required:"true"`

	// The maximum number of writes consumed per second before DynamoDB returns
	// a ThrottlingException. For more information, see Specifying Read and Write
	// Requirements (http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/WorkingWithTables.html#ProvisionedThroughput)
	// in the Amazon DynamoDB Developer Guide.
	WriteCapacityUnits *int64 `type:"long" required:"true"`
	// contains filtered or unexported fields
}

Represents the provisioned throughput settings for a specified table or index. The settings can be modified using the UpdateTable operation.

For current minimum and maximum provisioned throughput values, see Limits (http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Limits.html) in the Amazon DynamoDB Developer Guide.

type ProvisionedThroughputDescription 

type ProvisionedThroughputDescription struct {
	// The date and time of the last provisioned throughput decrease for this table.
	LastDecreaseDateTime *time.Time `type:"timestamp" timestampFormat:"unix"`

	// The date and time of the last provisioned throughput increase for this table.
	LastIncreaseDateTime *time.Time `type:"timestamp" timestampFormat:"unix"`

	// The number of provisioned throughput decreases for this table during this
	// UTC calendar day. For current maximums on provisioned throughput decreases,
	// see Limits (http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Limits.html)
	// in the Amazon DynamoDB Developer Guide.
	NumberOfDecreasesToday *int64 `type:"long"`

	// The maximum number of strongly consistent reads consumed per second before
	// DynamoDB returns a ThrottlingException. Eventually consistent reads require
	// less effort than strongly consistent reads, so a setting of 50 ReadCapacityUnits
	// per second provides 100 eventually consistent ReadCapacityUnits per second.
	ReadCapacityUnits *int64 `type:"long"`

	// The maximum number of writes consumed per second before DynamoDB returns
	// a ThrottlingException.
	WriteCapacityUnits *int64 `type:"long"`
	// contains filtered or unexported fields
}

Represents the provisioned throughput settings for the table, consisting of read and write capacity units, along with data about increases and decreases.

type PutItemInput 

type PutItemInput struct {
	// A condition that must be satisfied in order for a conditional PutItem operation
	// to succeed.
	//
	// An expression can contain any of the following:
	//
	//   Boolean functions: attribute_exists | attribute_not_exists | contains
	// | begins_with
	//
	// These function names are case-sensitive.
	//
	//   Comparison operators:  = | <> | < | > | <= | >= | BETWEEN | IN
	//
	//    Logical operators: AND | OR | NOT
	//
	//   For more information on condition expressions, go to Specifying Conditions
	// (http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Expressions.SpecifyingConditions.html)
	// in the Amazon DynamoDB Developer Guide.
	ConditionExpression *string `type:"string"`

	// There is a newer parameter available. Use ConditionExpression instead. Note
	// that if you use ConditionalOperator and  ConditionExpression  at the same
	// time, DynamoDB will return a ValidationException exception.
	//
	//  A logical operator to apply to the conditions in the Expected map:
	//
	//  AND - If all of the conditions evaluate to true, then the entire map evaluates
	// to true.
	//
	// OR - If at least one of the conditions evaluate to true, then the entire
	// map evaluates to true.
	//
	//  If you omit ConditionalOperator, then AND is the default.
	//
	// The operation will succeed only if the entire map evaluates to true.
	//
	// This parameter does not support attributes of type List or Map.
	ConditionalOperator *string `type:"string"`

	// There is a newer parameter available. Use ConditionExpression instead. Note
	// that if you use Expected and  ConditionExpression  at the same time, DynamoDB
	// will return a ValidationException exception.
	//
	//  A map of attribute/condition pairs. Expected provides a conditional block
	// for the PutItem operation.
	//
	// This parameter does not support attributes of type List or Map.
	//
	// Each element of Expected consists of an attribute name, a comparison operator,
	// and one or more values. DynamoDB compares the attribute with the value(s)
	// you supplied, using the comparison operator. For each Expected element, the
	// result of the evaluation is either true or false.
	//
	// If you specify more than one element in the Expected map, then by default
	// all of the conditions must evaluate to true. In other words, the conditions
	// are ANDed together. (You can use the ConditionalOperator parameter to OR
	// the conditions instead. If you do this, then at least one of the conditions
	// must evaluate to true, rather than all of them.)
	//
	// If the Expected map evaluates to true, then the conditional operation succeeds;
	// otherwise, it fails.
	//
	// Expected contains the following:
	//
	//   AttributeValueList - One or more values to evaluate against the supplied
	// attribute. The number of values in the list depends on the ComparisonOperator
	// being used.
	//
	// For type Number, value comparisons are numeric.
	//
	// String value comparisons for greater than, equals, or less than are based
	// on ASCII character code values. For example, a is greater than A, and a is
	// greater than B. For a list of code values, see http://en.wikipedia.org/wiki/ASCII#ASCII_printable_characters.
	//
	// For type Binary, DynamoDB treats each byte of the binary data as unsigned
	// when it compares binary values.
	//
	//   ComparisonOperator - A comparator for evaluating attributes in the AttributeValueList.
	// When performing the comparison, DynamoDB uses strongly consistent reads.
	//
	// The following comparison operators are available:
	//
	// EQ | NE | LE | LT | GE | GT | NOT_NULL | NULL | CONTAINS | NOT_CONTAINS
	// | BEGINS_WITH | IN | BETWEEN
	//
	// The following are descriptions of each comparison operator.
	//
	//   EQ : Equal. EQ is supported for all datatypes, including lists and maps.
	//
	// AttributeValueList can contain only one AttributeValue element of type String,
	// Number, Binary, String Set, Number Set, or Binary Set. If an item contains
	// an AttributeValue element of a different type than the one provided in the
	// request, the value does not match. For example, {"S":"6"} does not equal
	// {"N":"6"}. Also, {"N":"6"} does not equal {"NS":["6", "2", "1"]}.
	//
	//    NE : Not equal. NE is supported for all datatypes, including lists and
	// maps.
	//
	// AttributeValueList can contain only one AttributeValue of type String, Number,
	// Binary, String Set, Number Set, or Binary Set. If an item contains an AttributeValue
	// of a different type than the one provided in the request, the value does
	// not match. For example, {"S":"6"} does not equal {"N":"6"}. Also, {"N":"6"}
	// does not equal {"NS":["6", "2", "1"]}.
	//
	//    LE : Less than or equal.
	//
	// AttributeValueList can contain only one AttributeValue element of type String,
	// Number, or Binary (not a set type). If an item contains an AttributeValue
	// element of a different type than the one provided in the request, the value
	// does not match. For example, {"S":"6"} does not equal {"N":"6"}. Also, {"N":"6"}
	// does not compare to {"NS":["6", "2", "1"]}.
	//
	//    LT : Less than.
	//
	// AttributeValueList can contain only one AttributeValue of type String, Number,
	// or Binary (not a set type). If an item contains an AttributeValue element
	// of a different type than the one provided in the request, the value does
	// not match. For example, {"S":"6"} does not equal {"N":"6"}. Also, {"N":"6"}
	// does not compare to {"NS":["6", "2", "1"]}.
	//
	//    GE : Greater than or equal.
	//
	// AttributeValueList can contain only one AttributeValue element of type String,
	// Number, or Binary (not a set type). If an item contains an AttributeValue
	// element of a different type than the one provided in the request, the value
	// does not match. For example, {"S":"6"} does not equal {"N":"6"}. Also, {"N":"6"}
	// does not compare to {"NS":["6", "2", "1"]}.
	//
	//    GT : Greater than.
	//
	// AttributeValueList can contain only one AttributeValue element of type String,
	// Number, or Binary (not a set type). If an item contains an AttributeValue
	// element of a different type than the one provided in the request, the value
	// does not match. For example, {"S":"6"} does not equal {"N":"6"}. Also, {"N":"6"}
	// does not compare to {"NS":["6", "2", "1"]}.
	//
	//    NOT_NULL : The attribute exists. NOT_NULL is supported for all datatypes,
	// including lists and maps.
	//
	// This operator tests for the existence of an attribute, not its data type.
	// If the data type of attribute "a" is null, and you evaluate it using NOT_NULL,
	// the result is a Boolean true. This result is because the attribute "a" exists;
	// its data type is not relevant to the NOT_NULL comparison operator.
	//
	//    NULL : The attribute does not exist. NULL is supported for all datatypes,
	// including lists and maps.
	//
	// This operator tests for the nonexistence of an attribute, not its data type.
	// If the data type of attribute "a" is null, and you evaluate it using NULL,
	// the result is a Boolean false. This is because the attribute "a" exists;
	// its data type is not relevant to the NULL comparison operator.
	//
	//    CONTAINS : Checks for a subsequence, or value in a set.
	//
	// AttributeValueList can contain only one AttributeValue element of type String,
	// Number, or Binary (not a set type). If the target attribute of the comparison
	// is of type String, then the operator checks for a substring match. If the
	// target attribute of the comparison is of type Binary, then the operator looks
	// for a subsequence of the target that matches the input. If the target attribute
	// of the comparison is a set ("SS", "NS", or "BS"), then the operator evaluates
	// to true if it finds an exact match with any member of the set.
	//
	// CONTAINS is supported for lists: When evaluating "a CONTAINS b", "a" can
	// be a list; however, "b" cannot be a set, a map, or a list.
	//
	//   NOT_CONTAINS : Checks for absence of a subsequence, or absence of a value
	// in a set.
	//
	// AttributeValueList can contain only one AttributeValue element of type String,
	// Number, or Binary (not a set type). If the target attribute of the comparison
	// is a String, then the operator checks for the absence of a substring match.
	// If the target attribute of the comparison is Binary, then the operator checks
	// for the absence of a subsequence of the target that matches the input. If
	// the target attribute of the comparison is a set ("SS", "NS", or "BS"), then
	// the operator evaluates to true if it does not find an exact match with any
	// member of the set.
	//
	// NOT_CONTAINS is supported for lists: When evaluating "a NOT CONTAINS b",
	// "a" can be a list; however, "b" cannot be a set, a map, or a list.
	//
	//   BEGINS_WITH : Checks for a prefix.
	//
	// AttributeValueList can contain only one AttributeValue of type String or
	// Binary (not a Number or a set type). The target attribute of the comparison
	// must be of type String or Binary (not a Number or a set type).
	//
	//    IN : Checks for matching elements within two sets.
	//
	// AttributeValueList can contain one or more AttributeValue elements of type
	// String, Number, or Binary (not a set type). These attributes are compared
	// against an existing set type attribute of an item. If any elements of the
	// input set are present in the item attribute, the expression evaluates to
	// true.
	//
	//   BETWEEN : Greater than or equal to the first value, and less than or equal
	// to the second value.
	//
	// AttributeValueList must contain two AttributeValue elements of the same
	// type, either String, Number, or Binary (not a set type). A target attribute
	// matches if the target value is greater than, or equal to, the first element
	// and less than, or equal to, the second element. If an item contains an AttributeValue
	// element of a different type than the one provided in the request, the value
	// does not match. For example, {"S":"6"} does not compare to {"N":"6"}. Also,
	// {"N":"6"} does not compare to {"NS":["6", "2", "1"]}
	//
	//     For usage examples of AttributeValueList and ComparisonOperator, see
	// Legacy Conditional Parameters (http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/LegacyConditionalParameters.html)
	// in the Amazon DynamoDB Developer Guide.
	//
	// For backward compatibility with previous DynamoDB releases, the following
	// parameters can be used instead of AttributeValueList and ComparisonOperator:
	//
	//   Value - A value for DynamoDB to compare with an attribute.
	//
	//   Exists - A Boolean value that causes DynamoDB to evaluate the value before
	// attempting the conditional operation:
	//
	//   If Exists is true, DynamoDB will check to see if that attribute value
	// already exists in the table. If it is found, then the condition evaluates
	// to true; otherwise the condition evaluate to false.
	//
	//  If Exists is false, DynamoDB assumes that the attribute value does not
	// exist in the table. If in fact the value does not exist, then the assumption
	// is valid and the condition evaluates to true. If the value is found, despite
	// the assumption that it does not exist, the condition evaluates to false.
	//
	//  Note that the default value for Exists is true.
	//
	//   The Value and Exists parameters are incompatible with AttributeValueList
	// and ComparisonOperator. Note that if you use both sets of parameters at once,
	// DynamoDB will return a ValidationException exception.
	Expected *map[string]*ExpectedAttributeValue `type:"map"`

	// One or more substitution tokens for attribute names in an expression. The
	// following are some use cases for using ExpressionAttributeNames:
	//
	//   To access an attribute whose name conflicts with a DynamoDB reserved word.
	//
	//   To create a placeholder for repeating occurrences of an attribute name
	// in an expression.
	//
	//   To prevent special characters in an attribute name from being misinterpreted
	// in an expression.
	//
	//   Use the # character in an expression to dereference an attribute name.
	// For example, consider the following attribute name:
	//
	// Percentile
	//
	// The name of this attribute conflicts with a reserved word, so it cannot
	// be used directly in an expression. (For the complete list of reserved words,
	// go to Reserved Words (http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/ReservedWords.html)
	// in the Amazon DynamoDB Developer Guide). To work around this, you could specify
	// the following for ExpressionAttributeNames:
	//
	// {"#P":"Percentile"}
	//
	// You could then use this substitution in an expression, as in this example:
	//
	// #P = :val
	//
	// Tokens that begin with the : character are expression attribute values,
	// which are placeholders for the actual value at runtime.
	//
	// For more information on expression attribute names, go to Accessing Item
	// Attributes (http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Expressions.AccessingItemAttributes.html)
	// in the Amazon DynamoDB Developer Guide.
	ExpressionAttributeNames *map[string]*string `type:"map"`

	// One or more values that can be substituted in an expression.
	//
	// Use the : (colon) character in an expression to dereference an attribute
	// value. For example, suppose that you wanted to check whether the value of
	// the ProductStatus attribute was one of the following:
	//
	// Available | Backordered | Discontinued
	//
	// You would first need to specify ExpressionAttributeValues as follows:
	//
	// { ":avail":{"S":"Available"}, ":back":{"S":"Backordered"}, ":disc":{"S":"Discontinued"}
	// }
	//
	// You could then use these values in an expression, such as this:
	//
	// ProductStatus IN (:avail, :back, :disc)
	//
	// For more information on expression attribute values, go to Specifying Conditions
	// (http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Expressions.SpecifyingConditions.html)
	// in the Amazon DynamoDB Developer Guide.
	ExpressionAttributeValues *map[string]*AttributeValue `type:"map"`

	// A map of attribute name/value pairs, one for each attribute. Only the primary
	// key attributes are required; you can optionally provide other attribute name-value
	// pairs for the item.
	//
	// You must provide all of the attributes for the primary key. For example,
	// with a hash type primary key, you only need to provide the hash attribute.
	// For a hash-and-range type primary key, you must provide both the hash attribute
	// and the range attribute.
	//
	// If you specify any attributes that are part of an index key, then the data
	// types for those attributes must match those of the schema in the table's
	// attribute definition.
	//
	// For more information about primary keys, see Primary Key (http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/DataModel.html#DataModelPrimaryKey)
	// in the Amazon DynamoDB Developer Guide.
	//
	// Each element in the Item map is an AttributeValue object.
	Item *map[string]*AttributeValue `type:"map" required:"true"`

	// A value that if set to TOTAL, the response includes ConsumedCapacity data
	// for tables and indexes. If set to INDEXES, the response includes ConsumedCapacity
	// for indexes. If set to NONE (the default), ConsumedCapacity is not included
	// in the response.
	ReturnConsumedCapacity *string `type:"string"`

	// A value that if set to SIZE, the response includes statistics about item
	// collections, if any, that were modified during the operation are returned
	// in the response. If set to NONE (the default), no statistics are returned.
	ReturnItemCollectionMetrics *string `type:"string"`

	// Use ReturnValues if you want to get the item attributes as they appeared
	// before they were updated with the PutItem request. For PutItem, the valid
	// values are:
	//
	//   NONE - If ReturnValues is not specified, or if its value is NONE, then
	// nothing is returned. (This setting is the default for ReturnValues.)
	//
	//   ALL_OLD - If PutItem overwrote an attribute name-value pair, then the
	// content of the old item is returned.
	ReturnValues *string `type:"string"`

	// The name of the table to contain the item.
	TableName *string `type:"string" required:"true"`
	// contains filtered or unexported fields
}

Represents the input of a PutItem operation.

type PutItemOutput 

type PutItemOutput struct {
	// The attribute values as they appeared before the PutItem operation, but only
	// if ReturnValues is specified as ALL_OLD in the request. Each element consists
	// of an attribute name and an attribute value.
	Attributes *map[string]*AttributeValue `type:"map"`

	// The capacity units consumed by an operation. The data returned includes the
	// total provisioned throughput consumed, along with statistics for the table
	// and any indexes involved in the operation. ConsumedCapacity is only returned
	// if the request asked for it. For more information, see Provisioned Throughput
	// (http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/ProvisionedThroughputIntro.html)
	// in the Amazon DynamoDB Developer Guide.
	ConsumedCapacity *ConsumedCapacity `type:"structure"`

	// Information about item collections, if any, that were affected by the operation.
	// ItemCollectionMetrics is only returned if the request asked for it. If the
	// table does not have any local secondary indexes, this information is not
	// returned in the response.
	//
	// Each ItemCollectionMetrics element consists of:
	//
	//  ItemCollectionKey - The hash key value of the item collection. This is
	// the same as the hash key of the item.
	//
	// SizeEstimateRange - An estimate of item collection size, in gigabytes. This
	// value is a two-element array containing a lower bound and an upper bound
	// for the estimate. The estimate includes the size of all the items in the
	// table, plus the size of all attributes projected into all of the local secondary
	// indexes on that table. Use this estimate to measure whether a local secondary
	// index is approaching its size limit.
	//
	// The estimate is subject to change over time; therefore, do not rely on the
	// precision or accuracy of the estimate.
	ItemCollectionMetrics *ItemCollectionMetrics `type:"structure"`
	// contains filtered or unexported fields
}

Represents the output of a PutItem operation.

type PutRequest 

type PutRequest struct {
	// A map of attribute name to attribute values, representing the primary key
	// of an item to be processed by PutItem. All of the table's primary key attributes
	// must be specified, and their data types must match those of the table's key
	// schema. If any attributes are present in the item which are part of an index
	// key schema for the table, their types must match the index key schema.
	Item *map[string]*AttributeValue `type:"map" required:"true"`
	// contains filtered or unexported fields
}

Represents a request to perform a PutItem operation on an item.

type QueryInput 

type QueryInput struct {
	// There is a newer parameter available. Use ProjectionExpression instead. Note
	// that if you use AttributesToGet and ProjectionExpression at the same time,
	// DynamoDB will return a ValidationException exception.
	//
	// This parameter allows you to retrieve attributes of type List or Map; however,
	// it cannot retrieve individual elements within a List or a Map.
	//
	// The names of one or more attributes to retrieve. If no attribute names are
	// provided, then all attributes will be returned. If any of the requested attributes
	// are not found, they will not appear in the result.
	//
	// Note that AttributesToGet has no effect on provisioned throughput consumption.
	// DynamoDB determines capacity units consumed based on item size, not on the
	// amount of data that is returned to an application.
	//
	// You cannot use both AttributesToGet and Select together in a Query request,
	// unless the value for Select is SPECIFIC_ATTRIBUTES. (This usage is equivalent
	// to specifying AttributesToGet without any value for Select.)
	//
	// If you query a local secondary index and request only attributes that are
	// projected into that index, the operation will read only the index and not
	// the table. If any of the requested attributes are not projected into the
	// local secondary index, DynamoDB will fetch each of these attributes from
	// the parent table. This extra fetching incurs additional throughput cost and
	// latency.
	//
	// If you query a global secondary index, you can only request attributes that
	// are projected into the index. Global secondary index queries cannot fetch
	// attributes from the parent table.
	AttributesToGet []*string `type:"list"`

	// A logical operator to apply to the conditions in a QueryFilter map:
	//
	//  AND - If all of the conditions evaluate to true, then the entire map evaluates
	// to true.
	//
	// OR - If at least one of the conditions evaluate to true, then the entire
	// map evaluates to true.
	//
	//  If you omit ConditionalOperator, then AND is the default.
	//
	// The operation will succeed only if the entire map evaluates to true.
	//
	// This parameter does not support attributes of type List or Map.
	ConditionalOperator *string `type:"string"`

	// A value that if set to true, then the operation uses strongly consistent
	// reads; otherwise, eventually consistent reads are used.
	//
	// Strongly consistent reads are not supported on global secondary indexes.
	// If you query a global secondary index with ConsistentRead set to true, you
	// will receive an error message.
	ConsistentRead *bool `type:"boolean"`

	// The primary key of the first item that this operation will evaluate. Use
	// the value that was returned for LastEvaluatedKey in the previous operation.
	//
	// The data type for ExclusiveStartKey must be String, Number or Binary. No
	// set data types are allowed.
	ExclusiveStartKey *map[string]*AttributeValue `type:"map"`

	// One or more substitution tokens for attribute names in an expression. The
	// following are some use cases for using ExpressionAttributeNames:
	//
	//   To access an attribute whose name conflicts with a DynamoDB reserved word.
	//
	//   To create a placeholder for repeating occurrences of an attribute name
	// in an expression.
	//
	//   To prevent special characters in an attribute name from being misinterpreted
	// in an expression.
	//
	//   Use the # character in an expression to dereference an attribute name.
	// For example, consider the following attribute name:
	//
	// Percentile
	//
	// The name of this attribute conflicts with a reserved word, so it cannot
	// be used directly in an expression. (For the complete list of reserved words,
	// go to Reserved Words (http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/ReservedWords.html)
	// in the Amazon DynamoDB Developer Guide). To work around this, you could specify
	// the following for ExpressionAttributeNames:
	//
	// {"#P":"Percentile"}
	//
	// You could then use this substitution in an expression, as in this example:
	//
	// #P = :val
	//
	// Tokens that begin with the : character are expression attribute values,
	// which are placeholders for the actual value at runtime.
	//
	// For more information on expression attribute names, go to Accessing Item
	// Attributes (http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Expressions.AccessingItemAttributes.html)
	// in the Amazon DynamoDB Developer Guide.
	ExpressionAttributeNames *map[string]*string `type:"map"`

	// One or more values that can be substituted in an expression.
	//
	// Use the : (colon) character in an expression to dereference an attribute
	// value. For example, suppose that you wanted to check whether the value of
	// the ProductStatus attribute was one of the following:
	//
	// Available | Backordered | Discontinued
	//
	// You would first need to specify ExpressionAttributeValues as follows:
	//
	// { ":avail":{"S":"Available"}, ":back":{"S":"Backordered"}, ":disc":{"S":"Discontinued"}
	// }
	//
	// You could then use these values in an expression, such as this:
	//
	// ProductStatus IN (:avail, :back, :disc)
	//
	// For more information on expression attribute values, go to Specifying Conditions
	// (http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Expressions.SpecifyingConditions.html)
	// in the Amazon DynamoDB Developer Guide.
	ExpressionAttributeValues *map[string]*AttributeValue `type:"map"`

	// A string that contains conditions that DynamoDB applies after the Query operation,
	// but before the data is returned to you. Items that do not satisfy the FilterExpression
	// criteria are not returned.
	//
	// A FilterExpression is applied after the items have already been read; the
	// process of filtering does not consume any additional read capacity units.
	//
	// For more information, go to Filter Expressions (http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/QueryAndScan.html#FilteringResults)
	// in the Amazon DynamoDB Developer Guide.
	FilterExpression *string `type:"string"`

	// The name of an index to query. This index can be any local secondary index
	// or global secondary index on the table.
	IndexName *string `type:"string"`

	// The selection criteria for the query. For a query on a table, you can have
	// conditions only on the table primary key attributes. You must provide the
	// hash key attribute name and value as an EQ condition. You can optionally
	// provide a second condition, referring to the range key attribute.
	//
	// If you do not provide a range key condition, all of the items that match
	// the hash key will be retrieved. If a FilterExpression or QueryFilter is present,
	// it will be applied after the items are retrieved.
	//
	// For a query on an index, you can have conditions only on the index key attributes.
	// You must provide the index hash attribute name and value as an EQ condition.
	// You can optionally provide a second condition, referring to the index key
	// range attribute.
	//
	// Each KeyConditions element consists of an attribute name to compare, along
	// with the following:
	//
	//   AttributeValueList - One or more values to evaluate against the supplied
	// attribute. The number of values in the list depends on the ComparisonOperator
	// being used.
	//
	// For type Number, value comparisons are numeric.
	//
	// String value comparisons for greater than, equals, or less than are based
	// on ASCII character code values. For example, a is greater than A, and a is
	// greater than B. For a list of code values, see http://en.wikipedia.org/wiki/ASCII#ASCII_printable_characters
	// (http://en.wikipedia.org/wiki/ASCII#ASCII_printable_characters).
	//
	// For Binary, DynamoDB treats each byte of the binary data as unsigned when
	// it compares binary values.
	//
	//   ComparisonOperator - A comparator for evaluating attributes, for example,
	// equals, greater than, less than, and so on.
	//
	// For KeyConditions, only the following comparison operators are supported:
	//
	//  EQ | LE | LT | GE | GT | BEGINS_WITH | BETWEEN
	//
	// The following are descriptions of these comparison operators.
	//
	//   EQ : Equal.
	//
	// AttributeValueList can contain only one AttributeValue of type String, Number,
	// or Binary (not a set type). If an item contains an AttributeValue element
	// of a different type than the one specified in the request, the value does
	// not match. For example, {"S":"6"} does not equal {"N":"6"}. Also, {"N":"6"}
	// does not equal {"NS":["6", "2", "1"]}.
	//
	//    LE : Less than or equal.
	//
	// AttributeValueList can contain only one AttributeValue element of type String,
	// Number, or Binary (not a set type). If an item contains an AttributeValue
	// element of a different type than the one provided in the request, the value
	// does not match. For example, {"S":"6"} does not equal {"N":"6"}. Also, {"N":"6"}
	// does not compare to {"NS":["6", "2", "1"]}.
	//
	//    LT : Less than.
	//
	// AttributeValueList can contain only one AttributeValue of type String, Number,
	// or Binary (not a set type). If an item contains an AttributeValue element
	// of a different type than the one provided in the request, the value does
	// not match. For example, {"S":"6"} does not equal {"N":"6"}. Also, {"N":"6"}
	// does not compare to {"NS":["6", "2", "1"]}.
	//
	//    GE : Greater than or equal.
	//
	// AttributeValueList can contain only one AttributeValue element of type String,
	// Number, or Binary (not a set type). If an item contains an AttributeValue
	// element of a different type than the one provided in the request, the value
	// does not match. For example, {"S":"6"} does not equal {"N":"6"}. Also, {"N":"6"}
	// does not compare to {"NS":["6", "2", "1"]}.
	//
	//    GT : Greater than.
	//
	// AttributeValueList can contain only one AttributeValue element of type String,
	// Number, or Binary (not a set type). If an item contains an AttributeValue
	// element of a different type than the one provided in the request, the value
	// does not match. For example, {"S":"6"} does not equal {"N":"6"}. Also, {"N":"6"}
	// does not compare to {"NS":["6", "2", "1"]}.
	//
	//    BEGINS_WITH : Checks for a prefix.
	//
	// AttributeValueList can contain only one AttributeValue of type String or
	// Binary (not a Number or a set type). The target attribute of the comparison
	// must be of type String or Binary (not a Number or a set type).
	//
	//    BETWEEN : Greater than or equal to the first value, and less than or
	// equal to the second value.
	//
	// AttributeValueList must contain two AttributeValue elements of the same
	// type, either String, Number, or Binary (not a set type). A target attribute
	// matches if the target value is greater than, or equal to, the first element
	// and less than, or equal to, the second element. If an item contains an AttributeValue
	// element of a different type than the one provided in the request, the value
	// does not match. For example, {"S":"6"} does not compare to {"N":"6"}. Also,
	// {"N":"6"} does not compare to {"NS":["6", "2", "1"]}
	//
	//     For usage examples of AttributeValueList and ComparisonOperator, see
	// Legacy Conditional Parameters (http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/LegacyConditionalParameters.html)
	// in the Amazon DynamoDB Developer Guide.
	KeyConditions *map[string]*Condition `type:"map" required:"true"`

	// The maximum number of items to evaluate (not necessarily the number of matching
	// items). If DynamoDB processes the number of items up to the limit while processing
	// the results, it stops the operation and returns the matching values up to
	// that point, and a key in LastEvaluatedKey to apply in a subsequent operation,
	// so that you can pick up where you left off. Also, if the processed data set
	// size exceeds 1 MB before DynamoDB reaches this limit, it stops the operation
	// and returns the matching values up to the limit, and a key in LastEvaluatedKey
	// to apply in a subsequent operation to continue the operation. For more information,
	// see Query and Scan in the Amazon DynamoDB Developer Guide.
	Limit *int64 `type:"integer"`

	// A string that identifies one or more attributes to retrieve from the table.
	// These attributes can include scalars, sets, or elements of a JSON document.
	// The attributes in the expression must be separated by commas.
	//
	// If no attribute names are specified, then all attributes will be returned.
	// If any of the requested attributes are not found, they will not appear in
	// the result.
	//
	// For more information, go to Accessing Item Attributes (http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Expressions.AccessingItemAttributes.html)
	// in the Amazon DynamoDB Developer Guide.
	ProjectionExpression *string `type:"string"`

	// There is a newer parameter available. Use FilterExpression instead. Note
	// that if you use QueryFilter and FilterExpression at the same time, DynamoDB
	// will return a ValidationException exception.
	//
	//  A condition that evaluates the query results after the items are read and
	// returns only the desired values.
	//
	// This parameter does not support attributes of type List or Map.
	//
	// A QueryFilter is applied after the items have already been read; the process
	// of filtering does not consume any additional read capacity units.
	//
	// If you provide more than one condition in the QueryFilter map, then by default
	// all of the conditions must evaluate to true. In other words, the conditions
	// are ANDed together. (You can use the ConditionalOperator parameter to OR
	// the conditions instead. If you do this, then at least one of the conditions
	// must evaluate to true, rather than all of them.)
	//
	// Note that QueryFilter does not allow key attributes. You cannot define a
	// filter condition on a hash key or range key.
	//
	// Each QueryFilter element consists of an attribute name to compare, along
	// with the following:
	//
	//   AttributeValueList - One or more values to evaluate against the supplied
	// attribute. The number of values in the list depends on the operator specified
	// in ComparisonOperator.
	//
	// For type Number, value comparisons are numeric.
	//
	// String value comparisons for greater than, equals, or less than are based
	// on ASCII character code values. For example, a is greater than A, and a is
	// greater than B. For a list of code values, see http://en.wikipedia.org/wiki/ASCII#ASCII_printable_characters
	// (http://en.wikipedia.org/wiki/ASCII#ASCII_printable_characters).
	//
	// For type Binary, DynamoDB treats each byte of the binary data as unsigned
	// when it compares binary values.
	//
	// For information on specifying data types in JSON, see JSON Data Format (http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/DataFormat.html)
	// in the Amazon DynamoDB Developer Guide.
	//
	//   ComparisonOperator - A comparator for evaluating attributes. For example,
	// equals, greater than, less than, etc.
	//
	// The following comparison operators are available:
	//
	// EQ | NE | LE | LT | GE | GT | NOT_NULL | NULL | CONTAINS | NOT_CONTAINS
	// | BEGINS_WITH | IN | BETWEEN
	//
	// For complete descriptions of all comparison operators, see the Condition
	// (http://docs.aws.amazon.com/amazondynamodb/latest/APIReference/API_Condition.html)
	// data type.
	QueryFilter *map[string]*Condition `type:"map"`

	// A value that if set to TOTAL, the response includes ConsumedCapacity data
	// for tables and indexes. If set to INDEXES, the response includes ConsumedCapacity
	// for indexes. If set to NONE (the default), ConsumedCapacity is not included
	// in the response.
	ReturnConsumedCapacity *string `type:"string"`

	// A value that specifies ascending (true) or descending (false) traversal of
	// the index. DynamoDB returns results reflecting the requested order determined
	// by the range key. If the data type is Number, the results are returned in
	// numeric order. For type String, the results are returned in order of ASCII
	// character code values. For type Binary, DynamoDB treats each byte of the
	// binary data as unsigned when it compares binary values.
	//
	// If ScanIndexForward is not specified, the results are returned in ascending
	// order.
	ScanIndexForward *bool `type:"boolean"`

	// The attributes to be returned in the result. You can retrieve all item attributes,
	// specific item attributes, the count of matching items, or in the case of
	// an index, some or all of the attributes projected into the index.
	//
	//   ALL_ATTRIBUTES - Returns all of the item attributes from the specified
	// table or index. If you query a local secondary index, then for each matching
	// item in the index DynamoDB will fetch the entire item from the parent table.
	// If the index is configured to project all item attributes, then all of the
	// data can be obtained from the local secondary index, and no fetching is required.
	//
	//   ALL_PROJECTED_ATTRIBUTES - Allowed only when querying an index. Retrieves
	// all attributes that have been projected into the index. If the index is configured
	// to project all attributes, this return value is equivalent to specifying
	// ALL_ATTRIBUTES.
	//
	//   COUNT - Returns the number of matching items, rather than the matching
	// items themselves.
	//
	//    SPECIFIC_ATTRIBUTES - Returns only the attributes listed in AttributesToGet.
	// This return value is equivalent to specifying AttributesToGet without specifying
	// any value for Select.
	//
	// If you query a local secondary index and request only attributes that are
	// projected into that index, the operation will read only the index and not
	// the table. If any of the requested attributes are not projected into the
	// local secondary index, DynamoDB will fetch each of these attributes from
	// the parent table. This extra fetching incurs additional throughput cost and
	// latency.
	//
	// If you query a global secondary index, you can only request attributes that
	// are projected into the index. Global secondary index queries cannot fetch
	// attributes from the parent table.
	//
	//   If neither Select nor AttributesToGet are specified, DynamoDB defaults
	// to ALL_ATTRIBUTES when accessing a table, and ALL_PROJECTED_ATTRIBUTES when
	// accessing an index. You cannot use both Select and AttributesToGet together
	// in a single request, unless the value for Select is SPECIFIC_ATTRIBUTES.
	// (This usage is equivalent to specifying AttributesToGet without any value
	// for Select.)
	Select *string `type:"string"`

	// The name of the table containing the requested items.
	TableName *string `type:"string" required:"true"`
	// contains filtered or unexported fields
}

Represents the input of a Query operation.

type QueryOutput 

type QueryOutput struct {
	// The capacity units consumed by an operation. The data returned includes the
	// total provisioned throughput consumed, along with statistics for the table
	// and any indexes involved in the operation. ConsumedCapacity is only returned
	// if the request asked for it. For more information, see Provisioned Throughput
	// (http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/ProvisionedThroughputIntro.html)
	// in the Amazon DynamoDB Developer Guide.
	ConsumedCapacity *ConsumedCapacity `type:"structure"`

	// The number of items in the response.
	//
	// If you used a QueryFilter in the request, then Count is the number of items
	// returned after the filter was applied, and ScannedCount is the number of
	// matching items before> the filter was applied.
	//
	// If you did not use a filter in the request, then Count and ScannedCount
	// are the same.
	Count *int64 `type:"integer"`

	// An array of item attributes that match the query criteria. Each element in
	// this array consists of an attribute name and the value for that attribute.
	Items []*map[string]*AttributeValue `type:"list"`

	// The primary key of the item where the operation stopped, inclusive of the
	// previous result set. Use this value to start a new operation, excluding this
	// value in the new request.
	//
	// If LastEvaluatedKey is empty, then the "last page" of results has been processed
	// and there is no more data to be retrieved.
	//
	// If LastEvaluatedKey is not empty, it does not necessarily mean that there
	// is more data in the result set. The only way to know when you have reached
	// the end of the result set is when LastEvaluatedKey is empty.
	LastEvaluatedKey *map[string]*AttributeValue `type:"map"`

	// The number of items evaluated, before any QueryFilter is applied. A high
	// ScannedCount value with few, or no, Count results indicates an inefficient
	// Query operation. For more information, see Count and ScannedCount (http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/QueryAndScan.html#Count)
	// in the Amazon DynamoDB Developer Guide.
	//
	// If you did not use a filter in the request, then ScannedCount is the same
	// as Count.
	ScannedCount *int64 `type:"integer"`
	// contains filtered or unexported fields
}

Represents the output of a Query operation.

type ScanInput 

type ScanInput struct {
	// There is a newer parameter available. Use ProjectionExpression instead. Note
	// that if you use AttributesToGet and ProjectionExpression at the same time,
	// DynamoDB will return a ValidationException exception.
	//
	// This parameter allows you to retrieve attributes of type List or Map; however,
	// it cannot retrieve individual elements within a List or a Map.
	//
	// The names of one or more attributes to retrieve. If no attribute names are
	// provided, then all attributes will be returned. If any of the requested attributes
	// are not found, they will not appear in the result.
	//
	// Note that AttributesToGet has no effect on provisioned throughput consumption.
	// DynamoDB determines capacity units consumed based on item size, not on the
	// amount of data that is returned to an application.
	AttributesToGet []*string `type:"list"`

	// There is a newer parameter available. Use ConditionExpression instead. Note
	// that if you use ConditionalOperator and  ConditionExpression  at the same
	// time, DynamoDB will return a ValidationException exception.
	//
	//  A logical operator to apply to the conditions in a ScanFilter map:
	//
	//  AND - If all of the conditions evaluate to true, then the entire map evaluates
	// to true.
	//
	// OR - If at least one of the conditions evaluate to true, then the entire
	// map evaluates to true.
	//
	//  If you omit ConditionalOperator, then AND is the default.
	//
	// The operation will succeed only if the entire map evaluates to true.
	//
	// This parameter does not support attributes of type List or Map.
	ConditionalOperator *string `type:"string"`

	// The primary key of the first item that this operation will evaluate. Use
	// the value that was returned for LastEvaluatedKey in the previous operation.
	//
	// The data type for ExclusiveStartKey must be String, Number or Binary. No
	// set data types are allowed.
	//
	// In a parallel scan, a Scan request that includes ExclusiveStartKey must
	// specify the same segment whose previous Scan returned the corresponding value
	// of LastEvaluatedKey.
	ExclusiveStartKey *map[string]*AttributeValue `type:"map"`

	// One or more substitution tokens for attribute names in an expression. The
	// following are some use cases for using ExpressionAttributeNames:
	//
	//   To access an attribute whose name conflicts with a DynamoDB reserved word.
	//
	//   To create a placeholder for repeating occurrences of an attribute name
	// in an expression.
	//
	//   To prevent special characters in an attribute name from being misinterpreted
	// in an expression.
	//
	//   Use the # character in an expression to dereference an attribute name.
	// For example, consider the following attribute name:
	//
	// Percentile
	//
	// The name of this attribute conflicts with a reserved word, so it cannot
	// be used directly in an expression. (For the complete list of reserved words,
	// go to Reserved Words (http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/ReservedWords.html)
	// in the Amazon DynamoDB Developer Guide). To work around this, you could specify
	// the following for ExpressionAttributeNames:
	//
	// {"#P":"Percentile"}
	//
	// You could then use this substitution in an expression, as in this example:
	//
	// #P = :val
	//
	// Tokens that begin with the : character are expression attribute values,
	// which are placeholders for the actual value at runtime.
	//
	// For more information on expression attribute names, go to Accessing Item
	// Attributes (http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Expressions.AccessingItemAttributes.html)
	// in the Amazon DynamoDB Developer Guide.
	ExpressionAttributeNames *map[string]*string `type:"map"`

	// One or more values that can be substituted in an expression.
	//
	// Use the : (colon) character in an expression to dereference an attribute
	// value. For example, suppose that you wanted to check whether the value of
	// the ProductStatus attribute was one of the following:
	//
	// Available | Backordered | Discontinued
	//
	// You would first need to specify ExpressionAttributeValues as follows:
	//
	// { ":avail":{"S":"Available"}, ":back":{"S":"Backordered"}, ":disc":{"S":"Discontinued"}
	// }
	//
	// You could then use these values in an expression, such as this:
	//
	// ProductStatus IN (:avail, :back, :disc)
	//
	// For more information on expression attribute values, go to Specifying Conditions
	// (http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Expressions.SpecifyingConditions.html)
	// in the Amazon DynamoDB Developer Guide.
	ExpressionAttributeValues *map[string]*AttributeValue `type:"map"`

	// A string that contains conditions that DynamoDB applies after the Scan operation,
	// but before the data is returned to you. Items that do not satisfy the FilterExpression
	// criteria are not returned.
	//
	// A FilterExpression is applied after the items have already been read; the
	// process of filtering does not consume any additional read capacity units.
	//
	// For more information, go to Filter Expressions (http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/QueryAndScan.html#FilteringResults)
	// in the Amazon DynamoDB Developer Guide.
	FilterExpression *string `type:"string"`

	// The name of a secondary index to scan. This index can be any local secondary
	// index or global secondary index. Note that if you use the IndexName parameter,
	// you must also provide TableName.
	IndexName *string `type:"string"`

	// The maximum number of items to evaluate (not necessarily the number of matching
	// items). If DynamoDB processes the number of items up to the limit while processing
	// the results, it stops the operation and returns the matching values up to
	// that point, and a key in LastEvaluatedKey to apply in a subsequent operation,
	// so that you can pick up where you left off. Also, if the processed data set
	// size exceeds 1 MB before DynamoDB reaches this limit, it stops the operation
	// and returns the matching values up to the limit, and a key in LastEvaluatedKey
	// to apply in a subsequent operation to continue the operation. For more information,
	// see Query and Scan in the Amazon DynamoDB Developer Guide.
	Limit *int64 `type:"integer"`

	// A string that identifies one or more attributes to retrieve from the specified
	// table or index. These attributes can include scalars, sets, or elements of
	// a JSON document. The attributes in the expression must be separated by commas.
	//
	// If no attribute names are specified, then all attributes will be returned.
	// If any of the requested attributes are not found, they will not appear in
	// the result.
	//
	// For more information, go to Accessing Item Attributes (http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Expressions.AccessingItemAttributes.html)
	// in the Amazon DynamoDB Developer Guide.
	ProjectionExpression *string `type:"string"`

	// A value that if set to TOTAL, the response includes ConsumedCapacity data
	// for tables and indexes. If set to INDEXES, the response includes ConsumedCapacity
	// for indexes. If set to NONE (the default), ConsumedCapacity is not included
	// in the response.
	ReturnConsumedCapacity *string `type:"string"`

	// There is a newer parameter available. Use FilterExpression instead. Note
	// that if you use ScanFilter and FilterExpression at the same time, DynamoDB
	// will return a ValidationException exception.
	//
	//  A condition that evaluates the scan results and returns only the desired
	// values.
	//
	// This parameter does not support attributes of type List or Map.
	//
	// If you specify more than one condition in the ScanFilter map, then by default
	// all of the conditions must evaluate to true. In other words, the conditions
	// are ANDed together. (You can use the ConditionalOperator parameter to OR
	// the conditions instead. If you do this, then at least one of the conditions
	// must evaluate to true, rather than all of them.)
	//
	// Each ScanFilter element consists of an attribute name to compare, along
	// with the following:
	//
	//   AttributeValueList - One or more values to evaluate against the supplied
	// attribute. The number of values in the list depends on the operator specified
	// in ComparisonOperator .
	//
	// For type Number, value comparisons are numeric.
	//
	// String value comparisons for greater than, equals, or less than are based
	// on ASCII character code values. For example, a is greater than A, and a is
	// greater than B. For a list of code values, see http://en.wikipedia.org/wiki/ASCII#ASCII_printable_characters
	// (http://en.wikipedia.org/wiki/ASCII#ASCII_printable_characters).
	//
	// For Binary, DynamoDB treats each byte of the binary data as unsigned when
	// it compares binary values.
	//
	// For information on specifying data types in JSON, see JSON Data Format (http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/DataFormat.html)
	// in the Amazon DynamoDB Developer Guide.
	//
	//   ComparisonOperator - A comparator for evaluating attributes. For example,
	// equals, greater than, less than, etc.
	//
	// The following comparison operators are available:
	//
	// EQ | NE | LE | LT | GE | GT | NOT_NULL | NULL | CONTAINS | NOT_CONTAINS
	// | BEGINS_WITH | IN | BETWEEN
	//
	// For complete descriptions of all comparison operators, see Condition (http://docs.aws.amazon.com/amazondynamodb/latest/APIReference/API_Condition.html).
	ScanFilter *map[string]*Condition `type:"map"`

	// For a parallel Scan request, Segment identifies an individual segment to
	// be scanned by an application worker.
	//
	// Segment IDs are zero-based, so the first segment is always 0. For example,
	// if you want to use four application threads to scan a table or an index,
	// then the first thread specifies a Segment value of 0, the second thread specifies
	// 1, and so on.
	//
	// The value of LastEvaluatedKey returned from a parallel Scan request must
	// be used as ExclusiveStartKey with the same segment ID in a subsequent Scan
	// operation.
	//
	// The value for Segment must be greater than or equal to 0, and less than
	// the value provided for TotalSegments.
	//
	// If you provide Segment, you must also provide TotalSegments.
	Segment *int64 `type:"integer"`

	// The attributes to be returned in the result. You can retrieve all item attributes,
	// specific item attributes, or the count of matching items.
	//
	//   ALL_ATTRIBUTES - Returns all of the item attributes.
	//
	//   COUNT - Returns the number of matching items, rather than the matching
	// items themselves.
	//
	//    SPECIFIC_ATTRIBUTES - Returns only the attributes listed in AttributesToGet.
	// This return value is equivalent to specifying AttributesToGet without specifying
	// any value for Select.
	//
	//   If neither Select nor AttributesToGet are specified, DynamoDB defaults
	// to ALL_ATTRIBUTES. You cannot use both AttributesToGet and Select together
	// in a single request, unless the value for Select is SPECIFIC_ATTRIBUTES.
	// (This usage is equivalent to specifying AttributesToGet without any value
	// for Select.)
	Select *string `type:"string"`

	// The name of the table containing the requested items; or, if you provide
	// IndexName, the name of the table to which that index belongs.
	TableName *string `type:"string" required:"true"`

	// For a parallel Scan request, TotalSegments represents the total number of
	// segments into which the Scan operation will be divided. The value of TotalSegments
	// corresponds to the number of application workers that will perform the parallel
	// scan. For example, if you want to use four application threads to scan a
	// table or an index, specify a TotalSegments value of 4.
	//
	// The value for TotalSegments must be greater than or equal to 1, and less
	// than or equal to 1000000. If you specify a TotalSegments value of 1, the
	// Scan operation will be sequential rather than parallel.
	//
	// If you specify TotalSegments, you must also specify Segment.
	TotalSegments *int64 `type:"integer"`
	// contains filtered or unexported fields
}

Represents the input of a Scan operation.

type ScanOutput 

type ScanOutput struct {
	// The capacity units consumed by an operation. The data returned includes the
	// total provisioned throughput consumed, along with statistics for the table
	// and any indexes involved in the operation. ConsumedCapacity is only returned
	// if the request asked for it. For more information, see Provisioned Throughput
	// (http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/ProvisionedThroughputIntro.html)
	// in the Amazon DynamoDB Developer Guide.
	ConsumedCapacity *ConsumedCapacity `type:"structure"`

	// The number of items in the response.
	//
	// If you set ScanFilter in the request, then Count is the number of items
	// returned after the filter was applied, and ScannedCount is the number of
	// matching items before the filter was applied.
	//
	// If you did not use a filter in the request, then Count is the same as ScannedCount.
	Count *int64 `type:"integer"`

	// An array of item attributes that match the scan criteria. Each element in
	// this array consists of an attribute name and the value for that attribute.
	Items []*map[string]*AttributeValue `type:"list"`

	// The primary key of the item where the operation stopped, inclusive of the
	// previous result set. Use this value to start a new operation, excluding this
	// value in the new request.
	//
	// If LastEvaluatedKey is empty, then the "last page" of results has been processed
	// and there is no more data to be retrieved.
	//
	// If LastEvaluatedKey is not empty, it does not necessarily mean that there
	// is more data in the result set. The only way to know when you have reached
	// the end of the result set is when LastEvaluatedKey is empty.
	LastEvaluatedKey *map[string]*AttributeValue `type:"map"`

	// The number of items evaluated, before any ScanFilter is applied. A high ScannedCount
	// value with few, or no, Count results indicates an inefficient Scan operation.
	// For more information, see Count and ScannedCount (http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/QueryAndScan.html#Count)
	// in the Amazon DynamoDB Developer Guide.
	//
	// If you did not use a filter in the request, then ScannedCount is the same
	// as Count.
	ScannedCount *int64 `type:"integer"`
	// contains filtered or unexported fields
}

Represents the output of a Scan operation.

type TableDescription 

type TableDescription struct {
	// An array of AttributeDefinition objects. Each of these objects describes
	// one attribute in the table and index key schema.
	//
	// Each AttributeDefinition object in this array is composed of:
	//
	//   AttributeName - The name of the attribute.
	//
	//   AttributeType - The data type for the attribute.
	AttributeDefinitions []*AttributeDefinition `type:"list"`

	// The date and time when the table was created, in UNIX epoch time (http://www.epochconverter.com/)
	// format.
	CreationDateTime *time.Time `type:"timestamp" timestampFormat:"unix"`

	// The global secondary indexes, if any, on the table. Each index is scoped
	// to a given hash key value. Each element is composed of:
	//
	//   Backfilling - If true, then the index is currently in the backfilling
	// phase. Backfilling occurs only when a new global secondary index is added
	// to the table; it is the process by which DynamoDB populates the new index
	// with data from the table. (This attribute does not appear for indexes that
	// were created during a CreateTable operation.)
	//
	//   IndexName - The name of the global secondary index.
	//
	//   IndexSizeBytes - The total size of the global secondary index, in bytes.
	// DynamoDB updates this value approximately every six hours. Recent changes
	// might not be reflected in this value.
	//
	//   IndexStatus - The current status of the global secondary index:
	//
	//   CREATING - The index is being created.
	//
	//   UPDATING - The index is being updated.
	//
	//   DELETING - The index is being deleted.
	//
	//   ACTIVE - The index is ready for use.
	//
	//     ItemCount - The number of items in the global secondary index. DynamoDB
	// updates this value approximately every six hours. Recent changes might not
	// be reflected in this value.
	//
	//   KeySchema - Specifies the complete index key schema. The attribute names
	// in the key schema must be between 1 and 255 characters (inclusive). The key
	// schema must begin with the same hash key attribute as the table.
	//
	//   Projection - Specifies attributes that are copied (projected) from the
	// table into the index. These are in addition to the primary key attributes
	// and index key attributes, which are automatically projected. Each attribute
	// specification is composed of:
	//
	//   ProjectionType - One of the following:
	//
	//   KEYS_ONLY - Only the index and primary keys are projected into the index.
	//
	//   INCLUDE - Only the specified table attributes are projected into the index.
	// The list of projected attributes are in NonKeyAttributes.
	//
	//   ALL - All of the table attributes are projected into the index.
	//
	//     NonKeyAttributes - A list of one or more non-key attribute names that
	// are projected into the secondary index. The total count of attributes provided
	// in NonKeyAttributes, summed across all of the secondary indexes, must not
	// exceed 20. If you project the same attribute into two different indexes,
	// this counts as two distinct attributes when determining the total.
	//
	//     ProvisionedThroughput - The provisioned throughput settings for the
	// global secondary index, consisting of read and write capacity units, along
	// with data about increases and decreases.
	//
	//   If the table is in the DELETING state, no information about indexes will
	// be returned.
	GlobalSecondaryIndexes []*GlobalSecondaryIndexDescription `type:"list"`

	// The number of items in the specified table. DynamoDB updates this value approximately
	// every six hours. Recent changes might not be reflected in this value.
	ItemCount *int64 `type:"long"`

	// The primary key structure for the table. Each KeySchemaElement consists of:
	//
	//   AttributeName - The name of the attribute.
	//
	//   KeyType - The key type for the attribute. Can be either HASH or RANGE.
	//
	//   For more information about primary keys, see Primary Key (http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/DataModel.html#DataModelPrimaryKey)
	// in the Amazon DynamoDB Developer Guide.
	KeySchema []*KeySchemaElement `type:"list"`

	// Represents one or more local secondary indexes on the table. Each index is
	// scoped to a given hash key value. Tables with one or more local secondary
	// indexes are subject to an item collection size limit, where the amount of
	// data within a given item collection cannot exceed 10 GB. Each element is
	// composed of:
	//
	//   IndexName - The name of the local secondary index.
	//
	//   KeySchema - Specifies the complete index key schema. The attribute names
	// in the key schema must be between 1 and 255 characters (inclusive). The key
	// schema must begin with the same hash key attribute as the table.
	//
	//   Projection - Specifies attributes that are copied (projected) from the
	// table into the index. These are in addition to the primary key attributes
	// and index key attributes, which are automatically projected. Each attribute
	// specification is composed of:
	//
	//   ProjectionType - One of the following:
	//
	//   KEYS_ONLY - Only the index and primary keys are projected into the index.
	//
	//   INCLUDE - Only the specified table attributes are projected into the index.
	// The list of projected attributes are in NonKeyAttributes.
	//
	//   ALL - All of the table attributes are projected into the index.
	//
	//     NonKeyAttributes - A list of one or more non-key attribute names that
	// are projected into the secondary index. The total count of attributes provided
	// in NonKeyAttributes, summed across all of the secondary indexes, must not
	// exceed 20. If you project the same attribute into two different indexes,
	// this counts as two distinct attributes when determining the total.
	//
	//     IndexSizeBytes - Represents the total size of the index, in bytes. DynamoDB
	// updates this value approximately every six hours. Recent changes might not
	// be reflected in this value.
	//
	//   ItemCount - Represents the number of items in the index. DynamoDB updates
	// this value approximately every six hours. Recent changes might not be reflected
	// in this value.
	//
	//   If the table is in the DELETING state, no information about indexes will
	// be returned.
	LocalSecondaryIndexes []*LocalSecondaryIndexDescription `type:"list"`

	// The provisioned throughput settings for the table, consisting of read and
	// write capacity units, along with data about increases and decreases.
	ProvisionedThroughput *ProvisionedThroughputDescription `type:"structure"`

	// The name of the table.
	TableName *string `type:"string"`

	// The total size of the specified table, in bytes. DynamoDB updates this value
	// approximately every six hours. Recent changes might not be reflected in this
	// value.
	TableSizeBytes *int64 `type:"long"`

	// The current state of the table:
	//
	//   CREATING - The table is being created.
	//
	//   UPDATING - The table is being updated.
	//
	//   DELETING - The table is being deleted.
	//
	//   ACTIVE - The table is ready for use.
	TableStatus *string `type:"string"`
	// contains filtered or unexported fields
}

Represents the properties of a table.

type UpdateGlobalSecondaryIndexAction 

type UpdateGlobalSecondaryIndexAction struct {
	// The name of the global secondary index to be updated.
	IndexName *string `type:"string" required:"true"`

	// Represents the provisioned throughput settings for a specified table or index.
	// The settings can be modified using the UpdateTable operation.
	//
	// For current minimum and maximum provisioned throughput values, see Limits
	// (http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Limits.html)
	// in the Amazon DynamoDB Developer Guide.
	ProvisionedThroughput *ProvisionedThroughput `type:"structure" required:"true"`
	// contains filtered or unexported fields
}

Represents the new provisioned throughput settings to be applied to a global secondary index.

type UpdateItemInput 

type UpdateItemInput struct {
	// There is a newer parameter available. Use UpdateExpression instead. Note
	// that if you use AttributeUpdates and UpdateExpression at the same time, DynamoDB
	// will return a ValidationException exception.
	//
	// This parameter can be used for modifying top-level attributes; however,
	// it does not support individual list or map elements.
	//
	//  The names of attributes to be modified, the action to perform on each,
	// and the new value for each. If you are updating an attribute that is an index
	// key attribute for any indexes on that table, the attribute type must match
	// the index key type defined in the AttributesDefinition of the table description.
	// You can use UpdateItem to update any nonkey attributes.
	//
	// Attribute values cannot be null. String and Binary type attributes must
	// have lengths greater than zero. Set type attributes must not be empty. Requests
	// with empty values will be rejected with a ValidationException exception.
	//
	// Each AttributeUpdates element consists of an attribute name to modify, along
	// with the following:
	//
	//   Value - The new value, if applicable, for this attribute.
	//
	//   Action - A value that specifies how to perform the update. This action
	// is only valid for an existing attribute whose data type is Number or is a
	// set; do not use ADD for other data types.
	//
	// If an item with the specified primary key is found in the table, the following
	// values perform the following actions:
	//
	//   PUT - Adds the specified attribute to the item. If the attribute already
	// exists, it is replaced by the new value.
	//
	//   DELETE - Removes the attribute and its value, if no value is specified
	// for DELETE. The data type of the specified value must match the existing
	// value's data type.
	//
	// If a set of values is specified, then those values are subtracted from the
	// old set. For example, if the attribute value was the set [a,b,c] and the
	// DELETE action specifies [a,c], then the final attribute value is [b]. Specifying
	// an empty set is an error.
	//
	//   ADD - Adds the specified value to the item, if the attribute does not
	// already exist. If the attribute does exist, then the behavior of ADD depends
	// on the data type of the attribute:
	//
	//   If the existing attribute is a number, and if Value is also a number,
	// then Value is mathematically added to the existing attribute. If Value is
	// a negative number, then it is subtracted from the existing attribute.
	//
	//  If you use ADD to increment or decrement a number value for an item that
	// doesn't exist before the update, DynamoDB uses 0 as the initial value.
	//
	// Similarly, if you use ADD for an existing item to increment or decrement
	// an attribute value that doesn't exist before the update, DynamoDB uses 0
	// as the initial value. For example, suppose that the item you want to update
	// doesn't have an attribute named itemcount, but you decide to ADD the number
	// 3 to this attribute anyway. DynamoDB will create the itemcount attribute,
	// set its initial value to 0, and finally add 3 to it. The result will be a
	// new itemcount attribute, with a value of 3.
	//
	//    If the existing data type is a set, and if Value is also a set, then
	// Value is appended to the existing set. For example, if the attribute value
	// is the set [1,2], and the ADD action specified [3], then the final attribute
	// value is [1,2,3]. An error occurs if an ADD action is specified for a set
	// attribute and the attribute type specified does not match the existing set
	// type.
	//
	// Both sets must have the same primitive data type. For example, if the existing
	// data type is a set of strings, Value must also be a set of strings.
	//
	//     If no item with the specified key is found in the table, the following
	// values perform the following actions:
	//
	//   PUT - Causes DynamoDB to create a new item with the specified primary
	// key, and then adds the attribute.
	//
	//   DELETE - Nothing happens, because attributes cannot be deleted from a
	// nonexistent item. The operation succeeds, but DynamoDB does not create a
	// new item.
	//
	//   ADD - Causes DynamoDB to create an item with the supplied primary key
	// and number (or set of numbers) for the attribute value. The only data types
	// allowed are Number and Number Set.
	//
	//     If you provide any attributes that are part of an index key, then the
	// data types for those attributes must match those of the schema in the table's
	// attribute definition.
	AttributeUpdates *map[string]*AttributeValueUpdate `type:"map"`

	// A condition that must be satisfied in order for a conditional update to succeed.
	//
	// An expression can contain any of the following:
	//
	//   Boolean functions: attribute_exists | attribute_not_exists | contains
	// | begins_with
	//
	// These function names are case-sensitive.
	//
	//   Comparison operators:  = | <> | < | > | <= | >= | BETWEEN | IN
	//
	//    Logical operators: AND | OR | NOT
	//
	//   For more information on condition expressions, go to Specifying Conditions
	// (http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Expressions.SpecifyingConditions.html)
	// in the Amazon DynamoDB Developer Guide.
	ConditionExpression *string `type:"string"`

	// There is a newer parameter available. Use ConditionExpression instead. Note
	// that if you use ConditionalOperator and  ConditionExpression  at the same
	// time, DynamoDB will return a ValidationException exception.
	//
	//  A logical operator to apply to the conditions in the Expected map:
	//
	//  AND - If all of the conditions evaluate to true, then the entire map evaluates
	// to true.
	//
	// OR - If at least one of the conditions evaluate to true, then the entire
	// map evaluates to true.
	//
	//  If you omit ConditionalOperator, then AND is the default.
	//
	// The operation will succeed only if the entire map evaluates to true.
	//
	// This parameter does not support attributes of type List or Map.
	ConditionalOperator *string `type:"string"`

	// There is a newer parameter available. Use  ConditionExpression  instead.
	// Note that if you use Expected and  ConditionExpression  at the same time,
	// DynamoDB will return a ValidationException exception.
	//
	//  A map of attribute/condition pairs. Expected provides a conditional block
	// for the UpdateItem operation.
	//
	// Each element of Expected consists of an attribute name, a comparison operator,
	// and one or more values. DynamoDB compares the attribute with the value(s)
	// you supplied, using the comparison operator. For each Expected element, the
	// result of the evaluation is either true or false.
	//
	// If you specify more than one element in the Expected map, then by default
	// all of the conditions must evaluate to true. In other words, the conditions
	// are ANDed together. (You can use the ConditionalOperator parameter to OR
	// the conditions instead. If you do this, then at least one of the conditions
	// must evaluate to true, rather than all of them.)
	//
	// If the Expected map evaluates to true, then the conditional operation succeeds;
	// otherwise, it fails.
	//
	// Expected contains the following:
	//
	//   AttributeValueList - One or more values to evaluate against the supplied
	// attribute. The number of values in the list depends on the ComparisonOperator
	// being used.
	//
	// For type Number, value comparisons are numeric.
	//
	// String value comparisons for greater than, equals, or less than are based
	// on ASCII character code values. For example, a is greater than A, and a is
	// greater than B. For a list of code values, see http://en.wikipedia.org/wiki/ASCII#ASCII_printable_characters.
	//
	// For type Binary, DynamoDB treats each byte of the binary data as unsigned
	// when it compares binary values.
	//
	//   ComparisonOperator - A comparator for evaluating attributes in the AttributeValueList.
	// When performing the comparison, DynamoDB uses strongly consistent reads.
	//
	// The following comparison operators are available:
	//
	// EQ | NE | LE | LT | GE | GT | NOT_NULL | NULL | CONTAINS | NOT_CONTAINS
	// | BEGINS_WITH | IN | BETWEEN
	//
	// The following are descriptions of each comparison operator.
	//
	//   EQ : Equal. EQ is supported for all datatypes, including lists and maps.
	//
	// AttributeValueList can contain only one AttributeValue element of type String,
	// Number, Binary, String Set, Number Set, or Binary Set. If an item contains
	// an AttributeValue element of a different type than the one provided in the
	// request, the value does not match. For example, {"S":"6"} does not equal
	// {"N":"6"}. Also, {"N":"6"} does not equal {"NS":["6", "2", "1"]}.
	//
	//    NE : Not equal. NE is supported for all datatypes, including lists and
	// maps.
	//
	// AttributeValueList can contain only one AttributeValue of type String, Number,
	// Binary, String Set, Number Set, or Binary Set. If an item contains an AttributeValue
	// of a different type than the one provided in the request, the value does
	// not match. For example, {"S":"6"} does not equal {"N":"6"}. Also, {"N":"6"}
	// does not equal {"NS":["6", "2", "1"]}.
	//
	//    LE : Less than or equal.
	//
	// AttributeValueList can contain only one AttributeValue element of type String,
	// Number, or Binary (not a set type). If an item contains an AttributeValue
	// element of a different type than the one provided in the request, the value
	// does not match. For example, {"S":"6"} does not equal {"N":"6"}. Also, {"N":"6"}
	// does not compare to {"NS":["6", "2", "1"]}.
	//
	//    LT : Less than.
	//
	// AttributeValueList can contain only one AttributeValue of type String, Number,
	// or Binary (not a set type). If an item contains an AttributeValue element
	// of a different type than the one provided in the request, the value does
	// not match. For example, {"S":"6"} does not equal {"N":"6"}. Also, {"N":"6"}
	// does not compare to {"NS":["6", "2", "1"]}.
	//
	//    GE : Greater than or equal.
	//
	// AttributeValueList can contain only one AttributeValue element of type String,
	// Number, or Binary (not a set type). If an item contains an AttributeValue
	// element of a different type than the one provided in the request, the value
	// does not match. For example, {"S":"6"} does not equal {"N":"6"}. Also, {"N":"6"}
	// does not compare to {"NS":["6", "2", "1"]}.
	//
	//    GT : Greater than.
	//
	// AttributeValueList can contain only one AttributeValue element of type String,
	// Number, or Binary (not a set type). If an item contains an AttributeValue
	// element of a different type than the one provided in the request, the value
	// does not match. For example, {"S":"6"} does not equal {"N":"6"}. Also, {"N":"6"}
	// does not compare to {"NS":["6", "2", "1"]}.
	//
	//    NOT_NULL : The attribute exists. NOT_NULL is supported for all datatypes,
	// including lists and maps.
	//
	// This operator tests for the existence of an attribute, not its data type.
	// If the data type of attribute "a" is null, and you evaluate it using NOT_NULL,
	// the result is a Boolean true. This result is because the attribute "a" exists;
	// its data type is not relevant to the NOT_NULL comparison operator.
	//
	//    NULL : The attribute does not exist. NULL is supported for all datatypes,
	// including lists and maps.
	//
	// This operator tests for the nonexistence of an attribute, not its data type.
	// If the data type of attribute "a" is null, and you evaluate it using NULL,
	// the result is a Boolean false. This is because the attribute "a" exists;
	// its data type is not relevant to the NULL comparison operator.
	//
	//    CONTAINS : Checks for a subsequence, or value in a set.
	//
	// AttributeValueList can contain only one AttributeValue element of type String,
	// Number, or Binary (not a set type). If the target attribute of the comparison
	// is of type String, then the operator checks for a substring match. If the
	// target attribute of the comparison is of type Binary, then the operator looks
	// for a subsequence of the target that matches the input. If the target attribute
	// of the comparison is a set ("SS", "NS", or "BS"), then the operator evaluates
	// to true if it finds an exact match with any member of the set.
	//
	// CONTAINS is supported for lists: When evaluating "a CONTAINS b", "a" can
	// be a list; however, "b" cannot be a set, a map, or a list.
	//
	//   NOT_CONTAINS : Checks for absence of a subsequence, or absence of a value
	// in a set.
	//
	// AttributeValueList can contain only one AttributeValue element of type String,
	// Number, or Binary (not a set type). If the target attribute of the comparison
	// is a String, then the operator checks for the absence of a substring match.
	// If the target attribute of the comparison is Binary, then the operator checks
	// for the absence of a subsequence of the target that matches the input. If
	// the target attribute of the comparison is a set ("SS", "NS", or "BS"), then
	// the operator evaluates to true if it does not find an exact match with any
	// member of the set.
	//
	// NOT_CONTAINS is supported for lists: When evaluating "a NOT CONTAINS b",
	// "a" can be a list; however, "b" cannot be a set, a map, or a list.
	//
	//   BEGINS_WITH : Checks for a prefix.
	//
	// AttributeValueList can contain only one AttributeValue of type String or
	// Binary (not a Number or a set type). The target attribute of the comparison
	// must be of type String or Binary (not a Number or a set type).
	//
	//    IN : Checks for matching elements within two sets.
	//
	// AttributeValueList can contain one or more AttributeValue elements of type
	// String, Number, or Binary (not a set type). These attributes are compared
	// against an existing set type attribute of an item. If any elements of the
	// input set are present in the item attribute, the expression evaluates to
	// true.
	//
	//   BETWEEN : Greater than or equal to the first value, and less than or equal
	// to the second value.
	//
	// AttributeValueList must contain two AttributeValue elements of the same
	// type, either String, Number, or Binary (not a set type). A target attribute
	// matches if the target value is greater than, or equal to, the first element
	// and less than, or equal to, the second element. If an item contains an AttributeValue
	// element of a different type than the one provided in the request, the value
	// does not match. For example, {"S":"6"} does not compare to {"N":"6"}. Also,
	// {"N":"6"} does not compare to {"NS":["6", "2", "1"]}
	//
	//     For usage examples of AttributeValueList and ComparisonOperator, see
	// Legacy Conditional Parameters (http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/LegacyConditionalParameters.html)
	// in the Amazon DynamoDB Developer Guide.
	//
	// For backward compatibility with previous DynamoDB releases, the following
	// parameters can be used instead of AttributeValueList and ComparisonOperator:
	//
	//   Value - A value for DynamoDB to compare with an attribute.
	//
	//   Exists - A Boolean value that causes DynamoDB to evaluate the value before
	// attempting the conditional operation:
	//
	//   If Exists is true, DynamoDB will check to see if that attribute value
	// already exists in the table. If it is found, then the condition evaluates
	// to true; otherwise the condition evaluate to false.
	//
	//  If Exists is false, DynamoDB assumes that the attribute value does not
	// exist in the table. If in fact the value does not exist, then the assumption
	// is valid and the condition evaluates to true. If the value is found, despite
	// the assumption that it does not exist, the condition evaluates to false.
	//
	//  Note that the default value for Exists is true.
	//
	//   The Value and Exists parameters are incompatible with AttributeValueList
	// and ComparisonOperator. Note that if you use both sets of parameters at once,
	// DynamoDB will return a ValidationException exception.
	//
	// This parameter does not support attributes of type List or Map.
	Expected *map[string]*ExpectedAttributeValue `type:"map"`

	// One or more substitution tokens for attribute names in an expression. The
	// following are some use cases for using ExpressionAttributeNames:
	//
	//   To access an attribute whose name conflicts with a DynamoDB reserved word.
	//
	//   To create a placeholder for repeating occurrences of an attribute name
	// in an expression.
	//
	//   To prevent special characters in an attribute name from being misinterpreted
	// in an expression.
	//
	//   Use the # character in an expression to dereference an attribute name.
	// For example, consider the following attribute name:
	//
	// Percentile
	//
	// The name of this attribute conflicts with a reserved word, so it cannot
	// be used directly in an expression. (For the complete list of reserved words,
	// go to Reserved Words (http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/ReservedWords.html)
	// in the Amazon DynamoDB Developer Guide). To work around this, you could specify
	// the following for ExpressionAttributeNames:
	//
	// {"#P":"Percentile"}
	//
	// You could then use this substitution in an expression, as in this example:
	//
	// #P = :val
	//
	// Tokens that begin with the : character are expression attribute values,
	// which are placeholders for the actual value at runtime.
	//
	// For more information on expression attribute names, go to Accessing Item
	// Attributes (http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Expressions.AccessingItemAttributes.html)
	// in the Amazon DynamoDB Developer Guide.
	ExpressionAttributeNames *map[string]*string `type:"map"`

	// One or more values that can be substituted in an expression.
	//
	// Use the : (colon) character in an expression to dereference an attribute
	// value. For example, suppose that you wanted to check whether the value of
	// the ProductStatus attribute was one of the following:
	//
	// Available | Backordered | Discontinued
	//
	// You would first need to specify ExpressionAttributeValues as follows:
	//
	// { ":avail":{"S":"Available"}, ":back":{"S":"Backordered"}, ":disc":{"S":"Discontinued"}
	// }
	//
	// You could then use these values in an expression, such as this:
	//
	// ProductStatus IN (:avail, :back, :disc)
	//
	// For more information on expression attribute values, go to Specifying Conditions
	// (http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Expressions.SpecifyingConditions.html)
	// in the Amazon DynamoDB Developer Guide.
	ExpressionAttributeValues *map[string]*AttributeValue `type:"map"`

	// The primary key of the item to be updated. Each element consists of an attribute
	// name and a value for that attribute.
	//
	// For the primary key, you must provide all of the attributes. For example,
	// with a hash type primary key, you only need to provide the hash attribute.
	// For a hash-and-range type primary key, you must provide both the hash attribute
	// and the range attribute.
	Key *map[string]*AttributeValue `type:"map" required:"true"`

	// A value that if set to TOTAL, the response includes ConsumedCapacity data
	// for tables and indexes. If set to INDEXES, the response includes ConsumedCapacity
	// for indexes. If set to NONE (the default), ConsumedCapacity is not included
	// in the response.
	ReturnConsumedCapacity *string `type:"string"`

	// A value that if set to SIZE, the response includes statistics about item
	// collections, if any, that were modified during the operation are returned
	// in the response. If set to NONE (the default), no statistics are returned.
	ReturnItemCollectionMetrics *string `type:"string"`

	// Use ReturnValues if you want to get the item attributes as they appeared
	// either before or after they were updated. For UpdateItem, the valid values
	// are:
	//
	//   NONE - If ReturnValues is not specified, or if its value is NONE, then
	// nothing is returned. (This setting is the default for ReturnValues.)
	//
	//   ALL_OLD - If UpdateItem overwrote an attribute name-value pair, then the
	// content of the old item is returned.
	//
	//   UPDATED_OLD - The old versions of only the updated attributes are returned.
	//
	//   ALL_NEW - All of the attributes of the new version of the item are returned.
	//
	//   UPDATED_NEW - The new versions of only the updated attributes are returned.
	ReturnValues *string `type:"string"`

	// The name of the table containing the item to update.
	TableName *string `type:"string" required:"true"`

	// An expression that defines one or more attributes to be updated, the action
	// to be performed on them, and new value(s) for them.
	//
	// The following action values are available for UpdateExpression.
	//
	//   SET - Adds one or more attributes and values to an item. If any of these
	// attribute already exist, they are replaced by the new values. You can also
	// use SET to add or subtract from an attribute that is of type Number.
	//
	// SET supports the following functions:
	//
	//  if_not_exists (path, operand) - if the item does not contain an attribute
	// at the specified path, then if_not_exists evaluates to operand; otherwise,
	// it evaluates to path. You can use this function to avoid overwriting an attribute
	// that may already be present in the item.
	//
	// list_append (operand, operand) - evaluates to a list with a new element
	// added to it. You can append the new element to the start or the end of the
	// list by reversing the order of the operands.
	//
	//  These function names are case-sensitive.
	//
	//   REMOVE - Removes one or more attributes from an item.
	//
	//   ADD - Adds the specified value to the item, if the attribute does not
	// already exist. If the attribute does exist, then the behavior of ADD depends
	// on the data type of the attribute:
	//
	//   If the existing attribute is a number, and if Value is also a number,
	// then Value is mathematically added to the existing attribute. If Value is
	// a negative number, then it is subtracted from the existing attribute.
	//
	//  If you use ADD to increment or decrement a number value for an item that
	// doesn't exist before the update, DynamoDB uses 0 as the initial value.
	//
	// Similarly, if you use ADD for an existing item to increment or decrement
	// an attribute value that doesn't exist before the update, DynamoDB uses 0
	// as the initial value. For example, suppose that the item you want to update
	// doesn't have an attribute named itemcount, but you decide to ADD the number
	// 3 to this attribute anyway. DynamoDB will create the itemcount attribute,
	// set its initial value to 0, and finally add 3 to it. The result will be a
	// new itemcount attribute in the item, with a value of 3.
	//
	//    If the existing data type is a set and if Value is also a set, then Value
	// is added to the existing set. For example, if the attribute value is the
	// set [1,2], and the ADD action specified [3], then the final attribute value
	// is [1,2,3]. An error occurs if an ADD action is specified for a set attribute
	// and the attribute type specified does not match the existing set type.
	//
	// Both sets must have the same primitive data type. For example, if the existing
	// data type is a set of strings, the Value must also be a set of strings.
	//
	//   The ADD action only supports Number and set data types. In addition, ADD
	// can only be used on top-level attributes, not nested attributes.
	//
	//    DELETE - Deletes an element from a set.
	//
	// If a set of values is specified, then those values are subtracted from the
	// old set. For example, if the attribute value was the set [a,b,c] and the
	// DELETE action specifies [a,c], then the final attribute value is [b]. Specifying
	// an empty set is an error.
	//
	// The DELETE action only supports Number and set data types. In addition,
	// DELETE can only be used on top-level attributes, not nested attributes.
	//
	//    You can have many actions in a single expression, such as the following:
	// SET a=:value1, b=:value2 DELETE :value3, :value4, :value5
	//
	// For more information on update expressions, go to Modifying Items and Attributes
	// (http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Expressions.Modifying.html)
	// in the Amazon DynamoDB Developer Guide.
	UpdateExpression *string `type:"string"`
	// contains filtered or unexported fields
}

Represents the input of an UpdateItem operation.

type UpdateItemOutput 

type UpdateItemOutput struct {
	// A map of attribute values as they appeared before the UpdateItem operation.
	// This map only appears if ReturnValues was specified as something other than
	// NONE in the request. Each element represents one attribute.
	Attributes *map[string]*AttributeValue `type:"map"`

	// The capacity units consumed by an operation. The data returned includes the
	// total provisioned throughput consumed, along with statistics for the table
	// and any indexes involved in the operation. ConsumedCapacity is only returned
	// if the request asked for it. For more information, see Provisioned Throughput
	// (http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/ProvisionedThroughputIntro.html)
	// in the Amazon DynamoDB Developer Guide.
	ConsumedCapacity *ConsumedCapacity `type:"structure"`

	// Information about item collections, if any, that were affected by the operation.
	// ItemCollectionMetrics is only returned if the request asked for it. If the
	// table does not have any local secondary indexes, this information is not
	// returned in the response.
	ItemCollectionMetrics *ItemCollectionMetrics `type:"structure"`
	// contains filtered or unexported fields
}

Represents the output of an UpdateItem operation.

type UpdateTableInput 

type UpdateTableInput struct {
	// An array of attributes that describe the key schema for the table and indexes.
	// If you are adding a new global secondary index to the table, AttributeDefinitions
	// must include the key element(s) of the new index.
	AttributeDefinitions []*AttributeDefinition `type:"list"`

	// An array of one or more global secondary indexes for the table. For each
	// index in the array, you can request one action:
	//
	//  Create - add a new global secondary index to the table.
	//
	// Update - modify the provisioned throughput settings of an existing global
	// secondary index.
	//
	// Delete - remove a global secondary index from the table.
	GlobalSecondaryIndexUpdates []*GlobalSecondaryIndexUpdate `type:"list"`

	// Represents the provisioned throughput settings for a specified table or index.
	// The settings can be modified using the UpdateTable operation.
	//
	// For current minimum and maximum provisioned throughput values, see Limits
	// (http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Limits.html)
	// in the Amazon DynamoDB Developer Guide.
	ProvisionedThroughput *ProvisionedThroughput `type:"structure"`

	// The name of the table to be updated.
	TableName *string `type:"string" required:"true"`
	// contains filtered or unexported fields
}

Represents the input of an UpdateTable operation.

type UpdateTableOutput 

type UpdateTableOutput struct {
	// Represents the properties of a table.
	TableDescription *TableDescription `type:"structure"`
	// contains filtered or unexported fields
}

Represents the output of an UpdateTable operation.

type WriteRequest 

type WriteRequest struct {
	// A request to perform a DeleteItem operation.
	DeleteRequest *DeleteRequest `type:"structure"`

	// A request to perform a PutItem operation.
	PutRequest *PutRequest `type:"structure"`
	// contains filtered or unexported fields
}

Represents an operation to perform - either DeleteItem or PutItem. You can only request one of these operations, not both, in a single WriteRequest. If you do need to perform both of these operations, you will need to provide two separate WriteRequest objects.

Source Files

View all Source files

Jump to

Keyboard shortcuts

? : This menu
/ : Search site
f or F : Jump to
y or Y : Canonical URL
go.dev uses cookies from Google to deliver and enhance the quality of its services and to analyze traffic. Learn more.