model

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Published: Nov 2, 2020 License: Apache-2.0 Imports: 12 Imported by: 25

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Index

Constants

View Source
const (
	// AddIndexStr is a string related to the operation of "add index".
	AddIndexStr      = "add index"
	AddPrimaryKeyStr = "add primary key"
)
View Source
const (
	// FlagIgnoreTruncate indicates if truncate error should be ignored.
	// Read-only statements should ignore truncate error, write statements should not ignore truncate error.
	FlagIgnoreTruncate uint64 = 1
	// FlagTruncateAsWarning indicates if truncate error should be returned as warning.
	// This flag only matters if FlagIgnoreTruncate is not set, in strict sql mode, truncate error should
	// be returned as error, in non-strict sql mode, truncate error should be saved as warning.
	FlagTruncateAsWarning = 1 << 1
	// FlagPadCharToFullLength indicates if sql_mode 'PAD_CHAR_TO_FULL_LENGTH' is set.
	FlagPadCharToFullLength = 1 << 2
	// FlagInInsertStmt indicates if this is a INSERT statement.
	FlagInInsertStmt = 1 << 3
	// FlagInUpdateOrDeleteStmt indicates if this is a UPDATE statement or a DELETE statement.
	FlagInUpdateOrDeleteStmt = 1 << 4
	// FlagInSelectStmt indicates if this is a SELECT statement.
	FlagInSelectStmt = 1 << 5
	// FlagOverflowAsWarning indicates if overflow error should be returned as warning.
	// In strict sql mode, overflow error should be returned as error,
	// in non-strict sql mode, overflow error should be saved as warning.
	FlagOverflowAsWarning = 1 << 6
	// FlagIgnoreZeroInDate indicates if ZeroInDate error should be ignored.
	// Read-only statements should ignore ZeroInDate error.
	// Write statements should not ignore ZeroInDate error in strict sql mode.
	FlagIgnoreZeroInDate = 1 << 7
	// FlagDividedByZeroAsWarning indicates if DividedByZero should be returned as warning.
	FlagDividedByZeroAsWarning = 1 << 8
	// FlagInSetOprStmt indicates if this is a UNION/EXCEPT/INTERSECT statement.
	FlagInSetOprStmt = 1 << 9
	// FlagInLoadDataStmt indicates if this is a LOAD DATA statement.
	FlagInLoadDataStmt = 1 << 10
)

Flags are used by tipb.SelectRequest.Flags to handle execution mode, like how to handle truncate error.

View Source
const (
	// ColumnInfoVersion0 means the column info version is 0.
	ColumnInfoVersion0 = uint64(0)
	// ColumnInfoVersion1 means the column info version is 1.
	ColumnInfoVersion1 = uint64(1)
	// ColumnInfoVersion2 means the column info version is 2.
	// This is for v2.1.7 to Compatible with older versions charset problem.
	// Old version such as v2.0.8 treat utf8 as utf8mb4, because there is no UTF8 check in v2.0.8.
	// After version V2.1.2 (PR#8738) , TiDB add UTF8 check, then the user upgrade from v2.0.8 insert some UTF8MB4 characters will got error.
	// This is not compatibility for user. Then we try to fix this in PR #9820, and increase the version number.
	ColumnInfoVersion2 = uint64(2)

	// CurrLatestColumnInfoVersion means the latest column info in the current TiDB.
	CurrLatestColumnInfoVersion = ColumnInfoVersion2
)
View Source
const (
	// TableInfoVersion0 means the table info version is 0.
	// Upgrade from v2.1.1 or v2.1.2 to v2.1.3 and later, and then execute a "change/modify column" statement
	// that does not specify a charset value for column. Then the following error may be reported:
	// ERROR 1105 (HY000): unsupported modify charset from utf8mb4 to utf8.
	// To eliminate this error, we will not modify the charset of this column
	// when executing a change/modify column statement that does not specify a charset value for column.
	// This behavior is not compatible with MySQL.
	TableInfoVersion0 = uint16(0)
	// TableInfoVersion1 means the table info version is 1.
	// When we execute a change/modify column statement that does not specify a charset value for column,
	// we set the charset of this column to the charset of table. This behavior is compatible with MySQL.
	TableInfoVersion1 = uint16(1)
	// TableInfoVersion2 means the table info version is 2.
	// This is for v2.1.7 to Compatible with older versions charset problem.
	// Old version such as v2.0.8 treat utf8 as utf8mb4, because there is no UTF8 check in v2.0.8.
	// After version V2.1.2 (PR#8738) , TiDB add UTF8 check, then the user upgrade from v2.0.8 insert some UTF8MB4 characters will got error.
	// This is not compatibility for user. Then we try to fix this in PR #9820, and increase the version number.
	TableInfoVersion2 = uint16(2)
	// TableInfoVersion3 means the table info version is 3.
	// This version aims to deal with upper-cased charset name in TableInfo stored by versions prior to TiDB v2.1.9:
	// TiDB always suppose all charsets / collations as lower-cased and try to convert them if they're not.
	// However, the convert is missed in some scenarios before v2.1.9, so for all those tables prior to TableInfoVersion3, their
	// charsets / collations will be converted to lower-case while loading from the storage.
	TableInfoVersion3 = uint16(3)

	// CurrLatestTableInfoVersion means the latest table info in the current TiDB.
	CurrLatestTableInfoVersion = TableInfoVersion3
)
View Source
const (
	DefaultSequenceCacheBool          = true
	DefaultSequenceCycleBool          = false
	DefaultSequenceOrderBool          = false
	DefaultSequenceCacheValue         = int64(1000)
	DefaultSequenceIncrementValue     = int64(1)
	DefaultPositiveSequenceStartValue = int64(1)
	DefaultNegativeSequenceStartValue = int64(-1)
	DefaultPositiveSequenceMinValue   = int64(1)
	DefaultPositiveSequenceMaxValue   = int64(9223372036854775806)
	DefaultNegativeSequenceMaxValue   = int64(-1)
	DefaultNegativeSequenceMinValue   = int64(-9223372036854775807)
)
View Source
const (
	PartitionTypeRange      PartitionType = 1
	PartitionTypeHash                     = 2
	PartitionTypeList                     = 3
	PartitionTypeKey                      = 4
	PartitionTypeSystemTime               = 5
)

Partition types.

View Source
const ExtraHandleID = -1

ExtraHandleID is the column ID of column which we need to append to schema to occupy the handle's position for use of execution phase.

View Source
const ExtraPidColID = -2

ExtraPartitionID is the column ID of column which store the partitionID decoded in global index values.

Variables

View Source
var ExtraHandleName = NewCIStr("_tidb_rowid")

ExtraHandleName is the name of ExtraHandle Column.

View Source
var ExtraPartitionIdName = NewCIStr("_tidb_pid")

ExtraPartitionIdName is the name of ExtraPartitionId Column.

Functions

func TSConvert2Time

func TSConvert2Time(ts uint64) time.Time

TSConvert2Time converts timestamp to time.

Types

type ActionType

type ActionType byte

ActionType is the type for DDL action.

const (
	ActionNone                          ActionType = 0
	ActionCreateSchema                  ActionType = 1
	ActionDropSchema                    ActionType = 2
	ActionCreateTable                   ActionType = 3
	ActionDropTable                     ActionType = 4
	ActionAddColumn                     ActionType = 5
	ActionDropColumn                    ActionType = 6
	ActionAddIndex                      ActionType = 7
	ActionDropIndex                     ActionType = 8
	ActionAddForeignKey                 ActionType = 9
	ActionDropForeignKey                ActionType = 10
	ActionTruncateTable                 ActionType = 11
	ActionModifyColumn                  ActionType = 12
	ActionRebaseAutoID                  ActionType = 13
	ActionRenameTable                   ActionType = 14
	ActionSetDefaultValue               ActionType = 15
	ActionShardRowID                    ActionType = 16
	ActionModifyTableComment            ActionType = 17
	ActionRenameIndex                   ActionType = 18
	ActionAddTablePartition             ActionType = 19
	ActionDropTablePartition            ActionType = 20
	ActionCreateView                    ActionType = 21
	ActionModifyTableCharsetAndCollate  ActionType = 22
	ActionTruncateTablePartition        ActionType = 23
	ActionDropView                      ActionType = 24
	ActionRecoverTable                  ActionType = 25
	ActionModifySchemaCharsetAndCollate ActionType = 26
	ActionLockTable                     ActionType = 27
	ActionUnlockTable                   ActionType = 28
	ActionRepairTable                   ActionType = 29
	ActionSetTiFlashReplica             ActionType = 30
	ActionUpdateTiFlashReplicaStatus    ActionType = 31
	ActionAddPrimaryKey                 ActionType = 32
	ActionDropPrimaryKey                ActionType = 33
	ActionCreateSequence                ActionType = 34
	ActionAlterSequence                 ActionType = 35
	ActionDropSequence                  ActionType = 36
	ActionAddColumns                    ActionType = 37
	ActionDropColumns                   ActionType = 38
	ActionModifyTableAutoIdCache        ActionType = 39
	ActionRebaseAutoRandomBase          ActionType = 40
	ActionAlterIndexVisibility          ActionType = 41
	ActionExchangeTablePartition        ActionType = 42
	ActionAddCheckConstraint            ActionType = 43
	ActionDropCheckConstraint           ActionType = 44
	ActionAlterCheckConstraint          ActionType = 45
	ActionAlterTableAlterPartition      ActionType = 46
	ActionRenameTables                  ActionType = 47
)

List DDL actions.

func (ActionType) String

func (action ActionType) String() string

String return current ddl action in string

type AffectedOption

type AffectedOption struct {
	SchemaID    int64 `json:"schema_id"`
	TableID     int64 `json:"table_id"`
	OldTableID  int64 `json:"old_table_id"`
	OldSchemaID int64 `json:"old_schema_id"`
}

AffectedOption is used when a ddl affects multi tables.

type CIStr

type CIStr struct {
	O string `json:"O"` // Original string.
	L string `json:"L"` // Lower case string.
}

CIStr is case insensitive string.

func NewCIStr

func NewCIStr(s string) (cs CIStr)

NewCIStr creates a new CIStr.

func (CIStr) String

func (cis CIStr) String() string

String implements fmt.Stringer interface.

func (*CIStr) UnmarshalJSON

func (cis *CIStr) UnmarshalJSON(b []byte) error

UnmarshalJSON implements the user defined unmarshal method. CIStr can be unmarshaled from a single string, so PartitionDefinition.Name in this change https://github.com/pingcap/tidb/pull/6460/files would be compatible during TiDB upgrading.

type ChangeStateInfo

type ChangeStateInfo struct {
	// DependencyColumnOffset is the changing column offset that the current column depends on when executing modify/change column.
	DependencyColumnOffset int `json:"relative_col_offset"`
}

ChangeStateInfo is used for recording the information of schema changing.

type ColumnInfo

type ColumnInfo struct {
	ID                    int64       `json:"id"`
	Name                  CIStr       `json:"name"`
	Offset                int         `json:"offset"`
	OriginDefaultValue    interface{} `json:"origin_default"`
	OriginDefaultValueBit []byte      `json:"origin_default_bit"`
	DefaultValue          interface{} `json:"default"`
	DefaultValueBit       []byte      `json:"default_bit"`
	// DefaultIsExpr is indicates the default value string is expr.
	DefaultIsExpr       bool                `json:"default_is_expr"`
	GeneratedExprString string              `json:"generated_expr_string"`
	GeneratedStored     bool                `json:"generated_stored"`
	Dependences         map[string]struct{} `json:"dependences"`
	types.FieldType     `json:"type"`
	State               SchemaState `json:"state"`
	Comment             string      `json:"comment"`
	// A hidden column is used internally(expression index) and are not accessible by users.
	Hidden           bool `json:"hidden"`
	*ChangeStateInfo `json:"change_state_info"`
	// Version means the version of the column info.
	// Version = 0: For OriginDefaultValue and DefaultValue of timestamp column will stores the default time in system time zone.
	//              That is a bug if multiple TiDB servers in different system time zone.
	// Version = 1: For OriginDefaultValue and DefaultValue of timestamp column will stores the default time in UTC time zone.
	//              This will fix bug in version 0. For compatibility with version 0, we add version field in column info struct.
	Version uint64 `json:"version"`
}

ColumnInfo provides meta data describing of a table column.

func FindColumnInfo

func FindColumnInfo(cols []*ColumnInfo, name string) *ColumnInfo

FindColumnInfo finds ColumnInfo in cols by name.

func NewExtraHandleColInfo

func NewExtraHandleColInfo() *ColumnInfo

NewExtraHandleColInfo mocks a column info for extra handle column.

func NewExtraPartitionIDColInfo

func NewExtraPartitionIDColInfo() *ColumnInfo

NewExtraPartitionIDColInfo mocks a column info for extra partition id column.

func (*ColumnInfo) Clone

func (c *ColumnInfo) Clone() *ColumnInfo

Clone clones ColumnInfo.

func (*ColumnInfo) GetDefaultValue

func (c *ColumnInfo) GetDefaultValue() interface{}

GetDefaultValue gets the default value of the column. Default value use to stored in DefaultValue field, but now, bit type default value will store in DefaultValueBit for fix bit default value decode/encode bug.

func (*ColumnInfo) GetOriginDefaultValue

func (c *ColumnInfo) GetOriginDefaultValue() interface{}

GetOriginalDefaultValue gets the origin default value.

func (*ColumnInfo) GetTypeDesc

func (c *ColumnInfo) GetTypeDesc() string

GetTypeDesc gets the description for column type.

func (*ColumnInfo) IsGenerated

func (c *ColumnInfo) IsGenerated() bool

IsGenerated returns true if the column is generated column.

func (*ColumnInfo) SetDefaultValue

func (c *ColumnInfo) SetDefaultValue(value interface{}) error

SetDefaultValue sets the default value.

func (*ColumnInfo) SetOriginDefaultValue

func (c *ColumnInfo) SetOriginDefaultValue(value interface{}) error

SetOriginalDefaultValue sets the origin default value. For mysql.TypeBit type, the default value storage format must be a string. Other value such as int must convert to string format first. The mysql.TypeBit type supports the null default value.

type ConstraintInfo

type ConstraintInfo struct {
	ID             int64       `json:"id"`
	Name           CIStr       `json:"constraint_name"`
	Table          CIStr       `json:"tbl_name"`        // Table name.
	ConstraintCols []CIStr     `json:"constraint_cols"` // Depended column names.
	Enforced       bool        `json:"enforced"`
	InColumn       bool        `json:"in_column"` // Indicate whether the constraint is column type check.
	ExprString     string      `json:"expr_string"`
	State          SchemaState `json:"state"`
}

ConstraintInfo provides meta data describing check-expression constraint.

func (*ConstraintInfo) Clone

func (ci *ConstraintInfo) Clone() *ConstraintInfo

Clone clones ConstraintInfo.

type DBInfo

type DBInfo struct {
	ID      int64        `json:"id"`      // Database ID
	Name    CIStr        `json:"db_name"` // DB name.
	Charset string       `json:"charset"`
	Collate string       `json:"collate"`
	Tables  []*TableInfo `json:"-"` // Tables in the DB.
	State   SchemaState  `json:"state"`
}

DBInfo provides meta data describing a DB.

func (*DBInfo) Clone

func (db *DBInfo) Clone() *DBInfo

Clone clones DBInfo.

func (*DBInfo) Copy

func (db *DBInfo) Copy() *DBInfo

Copy shallow copies DBInfo.

type DDLReorgMeta

type DDLReorgMeta struct {
	// EndHandle is the last handle of the adding indices table.
	// We should only backfill indices in the range [startHandle, EndHandle].
	EndHandle int64 `json:"end_handle"`

	SQLMode       mysql.SQLMode                    `json:"sql_mode"`
	Warnings      map[errors.ErrorID]*terror.Error `json:"warnings"`
	WarningsCount map[errors.ErrorID]int64         `json:"warnings_count"`
}

DDLReorgMeta is meta info of DDL reorganization.

func NewDDLReorgMeta

func NewDDLReorgMeta() *DDLReorgMeta

NewDDLReorgMeta new a DDLReorgMeta.

type FKInfo

type FKInfo struct {
	ID       int64       `json:"id"`
	Name     CIStr       `json:"fk_name"`
	RefTable CIStr       `json:"ref_table"`
	RefCols  []CIStr     `json:"ref_cols"`
	Cols     []CIStr     `json:"cols"`
	OnDelete int         `json:"on_delete"`
	OnUpdate int         `json:"on_update"`
	State    SchemaState `json:"state"`
}

FKInfo provides meta data describing a foreign key constraint.

func (*FKInfo) Clone

func (fk *FKInfo) Clone() *FKInfo

Clone clones FKInfo.

type HistoryInfo

type HistoryInfo struct {
	SchemaVersion int64
	DBInfo        *DBInfo
	TableInfo     *TableInfo
	FinishedTS    uint64
}

HistoryInfo is used for binlog.

func (*HistoryInfo) AddDBInfo

func (h *HistoryInfo) AddDBInfo(schemaVer int64, dbInfo *DBInfo)

AddDBInfo adds schema version and schema information that are used for binlog. dbInfo is added in the following operations: create database, drop database.

func (*HistoryInfo) AddTableInfo

func (h *HistoryInfo) AddTableInfo(schemaVer int64, tblInfo *TableInfo)

AddTableInfo adds schema version and table information that are used for binlog. tblInfo is added except for the following operations: create database, drop database.

func (*HistoryInfo) Clean

func (h *HistoryInfo) Clean()

Clean cleans history information.

type IndexColumn

type IndexColumn struct {
	Name   CIStr `json:"name"`   // Index name
	Offset int   `json:"offset"` // Index offset
	// Length of prefix when using column prefix
	// for indexing;
	// UnspecifedLength if not using prefix indexing
	Length int `json:"length"`
}

IndexColumn provides index column info.

func (*IndexColumn) Clone

func (i *IndexColumn) Clone() *IndexColumn

Clone clones IndexColumn.

type IndexInfo

type IndexInfo struct {
	ID        int64          `json:"id"`
	Name      CIStr          `json:"idx_name"` // Index name.
	Table     CIStr          `json:"tbl_name"` // Table name.
	Columns   []*IndexColumn `json:"idx_cols"` // Index columns.
	State     SchemaState    `json:"state"`
	Comment   string         `json:"comment"`      // Comment
	Tp        IndexType      `json:"index_type"`   // Index type: Btree, Hash or Rtree
	Unique    bool           `json:"is_unique"`    // Whether the index is unique.
	Primary   bool           `json:"is_primary"`   // Whether the index is primary key.
	Invisible bool           `json:"is_invisible"` // Whether the index is invisible.
	Global    bool           `json:"is_global"`    // Whether the index is global.
}

IndexInfo provides meta data describing a DB index. It corresponds to the statement `CREATE INDEX Name ON Table (Column);` See https://dev.mysql.com/doc/refman/5.7/en/create-index.html

func (*IndexInfo) Clone

func (index *IndexInfo) Clone() *IndexInfo

Clone clones IndexInfo.

func (*IndexInfo) HasPrefixIndex

func (index *IndexInfo) HasPrefixIndex() bool

HasPrefixIndex returns whether any columns of this index uses prefix length.

type IndexType

type IndexType int

IndexType is the type of index

const (
	IndexTypeInvalid IndexType = iota
	IndexTypeBtree
	IndexTypeHash
	IndexTypeRtree
)

IndexTypes

func (IndexType) String

func (t IndexType) String() string

String implements Stringer interface.

type Job

type Job struct {
	ID         int64         `json:"id"`
	Type       ActionType    `json:"type"`
	SchemaID   int64         `json:"schema_id"`
	TableID    int64         `json:"table_id"`
	SchemaName string        `json:"schema_name"`
	State      JobState      `json:"state"`
	Error      *terror.Error `json:"err"`
	// ErrorCount will be increased, every time we meet an error when running job.
	ErrorCount int64 `json:"err_count"`
	// RowCount means the number of rows that are processed.
	RowCount int64         `json:"row_count"`
	Mu       sync.Mutex    `json:"-"`
	Args     []interface{} `json:"-"`
	// RawArgs : We must use json raw message to delay parsing special args.
	CtxVars     []interface{}   `json:"-"`
	RawArgs     json.RawMessage `json:"raw_args"`
	SchemaState SchemaState     `json:"schema_state"`
	// SnapshotVer means snapshot version for this job.
	SnapshotVer uint64 `json:"snapshot_ver"`
	// StartTS uses timestamp allocated by TSO.
	// Now it's the TS when we put the job to TiKV queue.
	StartTS uint64 `json:"start_ts"`
	// DependencyID is the job's ID that the current job depends on.
	DependencyID int64 `json:"dependency_id"`
	// Query string of the ddl job.
	Query      string       `json:"query"`
	BinlogInfo *HistoryInfo `json:"binlog"`

	// Version indicates the DDL job version. For old jobs, it will be 0.
	Version int64 `json:"version"`

	// ReorgMeta is meta info of ddl reorganization.
	// This field is depreciated.
	ReorgMeta *DDLReorgMeta `json:"reorg_meta"`

	// Priority is only used to set the operation priority of adding indices.
	Priority int `json:"priority"`
}

Job is for a DDL operation.

func (*Job) Decode

func (job *Job) Decode(b []byte) error

Decode decodes job from the json buffer, we must use DecodeArgs later to decode special args for this job.

func (*Job) DecodeArgs

func (job *Job) DecodeArgs(args ...interface{}) error

DecodeArgs decodes job args.

func (*Job) Encode

func (job *Job) Encode(updateRawArgs bool) ([]byte, error)

Encode encodes job with json format. updateRawArgs is used to determine whether to update the raw args.

func (*Job) FinishDBJob

func (job *Job) FinishDBJob(jobState JobState, schemaState SchemaState, ver int64, dbInfo *DBInfo)

FinishDBJob is called when a job is finished. It updates the job's state information and adds dbInfo the binlog.

func (*Job) FinishTableJob

func (job *Job) FinishTableJob(jobState JobState, schemaState SchemaState, ver int64, tblInfo *TableInfo)

FinishTableJob is called when a job is finished. It updates the job's state information and adds tblInfo to the binlog.

func (*Job) GetRowCount

func (job *Job) GetRowCount() int64

GetRowCount gets the number of rows. Make sure it can pass `make race`.

func (*Job) GetWarnings

func (job *Job) GetWarnings() (map[errors.ErrorID]*terror.Error, map[errors.ErrorID]int64)

GetWarnings gets the warnings of the rows handled.

func (*Job) IsCancelled

func (job *Job) IsCancelled() bool

IsCancelled returns whether the job is cancelled or not.

func (*Job) IsCancelling

func (job *Job) IsCancelling() bool

IsCancelling returns whether the job is cancelling or not.

func (*Job) IsDependentOn

func (job *Job) IsDependentOn(other *Job) (bool, error)

IsDependentOn returns whether the job depends on "other". How to check the job depends on "other"? 1. The two jobs handle the same database when one of the two jobs is an ActionDropSchema or ActionCreateSchema type. 2. Or the two jobs handle the same table.

func (*Job) IsDone

func (job *Job) IsDone() bool

IsDone returns whether job is done.

func (*Job) IsFinished

func (job *Job) IsFinished() bool

IsFinished returns whether job is finished or not. If the job state is Done or Cancelled, it is finished.

func (*Job) IsRollbackDone

func (job *Job) IsRollbackDone() bool

IsRollbackDone returns whether the job is rolled back or not.

func (*Job) IsRollingback

func (job *Job) IsRollingback() bool

IsRollingback returns whether the job is rolling back or not.

func (*Job) IsRunning

func (job *Job) IsRunning() bool

IsRunning returns whether job is still running or not.

func (*Job) IsSynced

func (job *Job) IsSynced() bool

IsSynced returns whether the DDL modification is synced among all TiDB servers.

func (*Job) SetRowCount

func (job *Job) SetRowCount(count int64)

SetRowCount sets the number of rows. Make sure it can pass `make race`.

func (*Job) SetWarnings

func (job *Job) SetWarnings(warnings map[errors.ErrorID]*terror.Error, warningsCount map[errors.ErrorID]int64)

SetWarnings sets the warnings of rows handled.

func (*Job) String

func (job *Job) String() string

String implements fmt.Stringer interface.

type JobState

type JobState byte

JobState is for job state.

const (
	JobStateNone    JobState = 0
	JobStateRunning JobState = 1
	// When DDL encountered an unrecoverable error at reorganization state,
	// some keys has been added already, we need to remove them.
	// JobStateRollingback is the state to do the rolling back job.
	JobStateRollingback  JobState = 2
	JobStateRollbackDone JobState = 3
	JobStateDone         JobState = 4
	JobStateCancelled    JobState = 5
	// JobStateSynced is used to mark the information about the completion of this job
	// has been synchronized to all servers.
	JobStateSynced JobState = 6
	// JobStateCancelling is used to mark the DDL job is cancelled by the client, but the DDL work hasn't handle it.
	JobStateCancelling JobState = 7
)

List job states.

func (JobState) String

func (s JobState) String() string

String implements fmt.Stringer interface.

type PartitionDefinition

type PartitionDefinition struct {
	ID       int64      `json:"id"`
	Name     CIStr      `json:"name"`
	LessThan []string   `json:"less_than"`
	InValues [][]string `json:"in_values"`
	Comment  string     `json:"comment,omitempty"`
}

PartitionDefinition defines a single partition.

func (*PartitionDefinition) Clone

Clone clones ConstraintInfo.

type PartitionInfo

type PartitionInfo struct {
	Type    PartitionType `json:"type"`
	Expr    string        `json:"expr"`
	Columns []CIStr       `json:"columns"`

	// User may already creates table with partition but table partition is not
	// yet supported back then. When Enable is true, write/read need use tid
	// rather than pid.
	Enable bool `json:"enable"`

	Definitions []PartitionDefinition `json:"definitions"`
	// AddingDefinitions is filled when adding a partition that is in the mid state.
	AddingDefinitions []PartitionDefinition `json:"adding_definitions"`
	// DroppingDefinitions is filled when dropping a partition that is in the mid state.
	DroppingDefinitions []PartitionDefinition `json:"dropping_definitions"`
	Num                 uint64                `json:"num"`
}

PartitionInfo provides table partition info.

func (*PartitionInfo) GetNameByID

func (pi *PartitionInfo) GetNameByID(id int64) string

GetNameByID gets the partition name by ID.

type PartitionType

type PartitionType int

PartitionType is the type for PartitionInfo

func (PartitionType) String

func (p PartitionType) String() string

type SchemaDiff

type SchemaDiff struct {
	Version  int64      `json:"version"`
	Type     ActionType `json:"type"`
	SchemaID int64      `json:"schema_id"`
	TableID  int64      `json:"table_id"`

	// OldTableID is the table ID before truncate, only used by truncate table DDL.
	OldTableID int64 `json:"old_table_id"`
	// OldSchemaID is the schema ID before rename table, only used by rename table DDL.
	OldSchemaID int64 `json:"old_schema_id"`

	AffectedOpts []*AffectedOption `json:"affected_options"`
}

SchemaDiff contains the schema modification at a particular schema version. It is used to reduce schema reload cost.

type SchemaState

type SchemaState byte

SchemaState is the state for schema elements.

const (
	// StateNone means this schema element is absent and can't be used.
	StateNone SchemaState = iota
	// StateDeleteOnly means we can only delete items for this schema element.
	StateDeleteOnly
	// StateWriteOnly means we can use any write operation on this schema element,
	// but outer can't read the changed data.
	StateWriteOnly
	// StateReplica means we're waiting tiflash replica to be finished.
	StateWriteReorganization
	// StateDeleteReorganization means we are re-organizing whole data after delete only state.
	StateDeleteReorganization
	// StatePublic means this schema element is ok for all write and read operations.
	StatePublic
	// StateReplica means we're waiting tiflash replica to be finished.
	StateReplicaOnly
)

func (SchemaState) String

func (s SchemaState) String() string

String implements fmt.Stringer interface.

type SequenceInfo

type SequenceInfo struct {
	Start      int64  `json:"sequence_start"`
	Cache      bool   `json:"sequence_cache"`
	Cycle      bool   `json:"sequence_cycle"`
	MinValue   int64  `json:"sequence_min_value"`
	MaxValue   int64  `json:"sequence_max_value"`
	Increment  int64  `json:"sequence_increment"`
	CacheValue int64  `json:"sequence_cache_value"`
	Comment    string `json:"sequence_comment"`
}

SequenceInfo provide meta data describing a DB sequence.

type SessionInfo

type SessionInfo struct {
	ServerID  string
	SessionID uint64
}

SessionInfo contain the session ID and the server ID.

func (SessionInfo) String

func (s SessionInfo) String() string

type TableColumnID

type TableColumnID struct {
	TableID  int64
	ColumnID int64
}

TableColumnID is composed by table ID and column ID.

type TableInfo

type TableInfo struct {
	ID      int64  `json:"id"`
	Name    CIStr  `json:"name"`
	Charset string `json:"charset"`
	Collate string `json:"collate"`
	// Columns are listed in the order in which they appear in the schema.
	Columns     []*ColumnInfo     `json:"cols"`
	Indices     []*IndexInfo      `json:"index_info"`
	Constraints []*ConstraintInfo `json:"constraint_info"`
	ForeignKeys []*FKInfo         `json:"fk_info"`
	State       SchemaState       `json:"state"`
	// PKIsHandle is true when primary key is a single integer column.
	PKIsHandle bool `json:"pk_is_handle"`
	// IsCommonHandle is true when clustered index feature is
	// enabled and the primary key is not a single integer column.
	IsCommonHandle bool `json:"is_common_handle"`

	Comment         string `json:"comment"`
	AutoIncID       int64  `json:"auto_inc_id"`
	AutoIdCache     int64  `json:"auto_id_cache"`
	AutoRandID      int64  `json:"auto_rand_id"`
	MaxColumnID     int64  `json:"max_col_id"`
	MaxIndexID      int64  `json:"max_idx_id"`
	MaxConstraintID int64  `json:"max_cst_id"`
	// UpdateTS is used to record the timestamp of updating the table's schema information.
	// These changing schema operations don't include 'truncate table' and 'rename table'.
	UpdateTS uint64 `json:"update_timestamp"`
	// OldSchemaID :
	// Because auto increment ID has schemaID as prefix,
	// We need to save original schemaID to keep autoID unchanged
	// while renaming a table from one database to another.
	// TODO: Remove it.
	// Now it only uses for compatibility with the old version that already uses this field.
	OldSchemaID int64 `json:"old_schema_id,omitempty"`

	// ShardRowIDBits specify if the implicit row ID is sharded.
	ShardRowIDBits uint64
	// MaxShardRowIDBits uses to record the max ShardRowIDBits be used so far.
	MaxShardRowIDBits uint64 `json:"max_shard_row_id_bits"`
	// AutoRandomBits is used to set the bit number to shard automatically when PKIsHandle.
	AutoRandomBits uint64 `json:"auto_random_bits"`
	// PreSplitRegions specify the pre-split region when create table.
	// The pre-split region num is 2^(PreSplitRegions-1).
	// And the PreSplitRegions should less than or equal to ShardRowIDBits.
	PreSplitRegions uint64 `json:"pre_split_regions"`

	Partition *PartitionInfo `json:"partition"`

	Compression string `json:"compression"`

	View *ViewInfo `json:"view"`

	Sequence *SequenceInfo `json:"sequence"`

	// Lock represent the table lock info.
	Lock *TableLockInfo `json:"Lock"`

	// Version means the version of the table info.
	Version uint16 `json:"version"`

	// TiFlashReplica means the TiFlash replica info.
	TiFlashReplica *TiFlashReplicaInfo `json:"tiflash_replica"`

	// IsColumnar means the table is column-oriented.
	// It's true when the engine of the table is TiFlash only.
	IsColumnar bool `json:"is_columnar"`
}

TableInfo provides meta data describing a DB table.

func (*TableInfo) Clone

func (t *TableInfo) Clone() *TableInfo

Clone clones TableInfo.

func (*TableInfo) Cols

func (t *TableInfo) Cols() []*ColumnInfo

Cols returns the columns of the table in public state.

func (*TableInfo) ColumnIsInIndex

func (t *TableInfo) ColumnIsInIndex(c *ColumnInfo) bool

ColumnIsInIndex checks whether c is included in any indices of t.

func (*TableInfo) ContainsAutoRandomBits

func (t *TableInfo) ContainsAutoRandomBits() bool

ContainsAutoRandomBits indicates whether a table contains auto_random column.

func (*TableInfo) FindConstraintInfoByName

func (t *TableInfo) FindConstraintInfoByName(constrName string) *ConstraintInfo

FindConstraintInfoByName finds constraintInfo by name.

func (*TableInfo) FindIndexByName

func (t *TableInfo) FindIndexByName(idxName string) *IndexInfo

FindIndexByName finds index by name.

func (*TableInfo) FindPartitionDefinitionByName

func (t *TableInfo) FindPartitionDefinitionByName(partitionDefinitionName string) *PartitionDefinition

FindPartitionDefinitionByName finds PartitionDefinition by name.

func (*TableInfo) GetAutoIncrementColInfo

func (t *TableInfo) GetAutoIncrementColInfo() *ColumnInfo

func (*TableInfo) GetDBID

func (t *TableInfo) GetDBID(dbID int64) int64

GetDBID returns the schema ID that is used to create an allocator. TODO: Remove it after removing OldSchemaID.

func (*TableInfo) GetPartitionInfo

func (t *TableInfo) GetPartitionInfo() *PartitionInfo

GetPartitionInfo returns the partition information.

func (*TableInfo) GetPkColInfo

func (t *TableInfo) GetPkColInfo() *ColumnInfo

GetPkColInfo gets the ColumnInfo of pk if exists. Make sure PkIsHandle checked before call this method.

func (*TableInfo) GetPkName

func (t *TableInfo) GetPkName() CIStr

GetPkName will return the pk name if pk exists.

func (*TableInfo) GetUpdateTime

func (t *TableInfo) GetUpdateTime() time.Time

GetUpdateTime gets the table's updating time.

func (*TableInfo) IsAutoIncColUnsigned

func (t *TableInfo) IsAutoIncColUnsigned() bool

func (*TableInfo) IsAutoRandomBitColUnsigned

func (t *TableInfo) IsAutoRandomBitColUnsigned() bool

IsAutoRandomBitColUnsigned indicates whether the auto_random column is unsigned. Make sure the table contains auto_random before calling this method.

func (*TableInfo) IsLocked

func (t *TableInfo) IsLocked() bool

IsLocked checks whether the table was locked.

func (*TableInfo) IsSequence

func (t *TableInfo) IsSequence() bool

IsSequence checks if TableInfo is a sequence.

func (*TableInfo) IsView

func (t *TableInfo) IsView() bool

IsView checks if TableInfo is a view.

type TableLockInfo

type TableLockInfo struct {
	Tp TableLockType
	// Use array because there may be multiple sessions holding the same read lock.
	Sessions []SessionInfo
	State    TableLockState
	// TS is used to record the timestamp this table lock been locked.
	TS uint64
}

TableLockInfo provides meta data describing a table lock.

type TableLockState

type TableLockState byte

TableLockState is the state for table lock.

const (
	// TableLockStateNone means this table lock is absent.
	TableLockStateNone TableLockState = iota
	// TableLockStatePreLock means this table lock is pre-lock state. Other session doesn't hold this lock should't do corresponding operation according to the lock type.
	TableLockStatePreLock
	// TableLockStatePublic means this table lock is public state.
	TableLockStatePublic
)

func (TableLockState) String

func (t TableLockState) String() string

String implements fmt.Stringer interface.

type TableLockTpInfo

type TableLockTpInfo struct {
	SchemaID int64
	TableID  int64
	Tp       TableLockType
}

TableLockTpInfo is composed by schema ID, table ID and table lock type.

type TableLockType

type TableLockType byte

TableLockType is the type of the table lock.

const (
	TableLockNone TableLockType = iota
	// TableLockRead means the session with this lock can read the table (but not write it).
	// Multiple sessions can acquire a READ lock for the table at the same time.
	// Other sessions can read the table without explicitly acquiring a READ lock.
	TableLockRead
	// TableLockReadLocal is not supported.
	TableLockReadLocal
	// TableLockWrite means only the session with this lock has write/read permission.
	// Only the session that holds the lock can access the table. No other session can access it until the lock is released.
	TableLockWrite
	// TableLockWriteLocal means the session with this lock has write/read permission, and the other session still has read permission.
	TableLockWriteLocal
)

func (TableLockType) String

func (t TableLockType) String() string

type TiFlashReplicaInfo

type TiFlashReplicaInfo struct {
	Count                 uint64
	LocationLabels        []string
	Available             bool
	AvailablePartitionIDs []int64
}

TiFlashReplicaInfo means the flash replica info.

func (*TiFlashReplicaInfo) IsPartitionAvailable

func (tr *TiFlashReplicaInfo) IsPartitionAvailable(pid int64) bool

IsPartitionAvailable checks whether the partition table replica was available.

type ViewAlgorithm

type ViewAlgorithm int

ViewAlgorithm is VIEW's SQL AlGORITHM characteristic. See https://dev.mysql.com/doc/refman/5.7/en/view-algorithms.html

const (
	AlgorithmUndefined ViewAlgorithm = iota
	AlgorithmMerge
	AlgorithmTemptable
)

func (*ViewAlgorithm) String

func (v *ViewAlgorithm) String() string

type ViewCheckOption

type ViewCheckOption int

ViewCheckOption is VIEW's WITH CHECK OPTION clause part. See https://dev.mysql.com/doc/refman/5.7/en/view-check-option.html

const (
	CheckOptionLocal ViewCheckOption = iota
	CheckOptionCascaded
)

func (*ViewCheckOption) String

func (v *ViewCheckOption) String() string

type ViewInfo

type ViewInfo struct {
	Algorithm   ViewAlgorithm      `json:"view_algorithm"`
	Definer     *auth.UserIdentity `json:"view_definer"`
	Security    ViewSecurity       `json:"view_security"`
	SelectStmt  string             `json:"view_select"`
	CheckOption ViewCheckOption    `json:"view_checkoption"`
	Cols        []CIStr            `json:"view_cols"`
}

ViewInfo provides meta data describing a DB view.

type ViewSecurity

type ViewSecurity int

ViewSecurity is VIEW's SQL SECURITY characteristic. See https://dev.mysql.com/doc/refman/5.7/en/create-view.html

const (
	SecurityDefiner ViewSecurity = iota
	SecurityInvoker
)

func (*ViewSecurity) String

func (v *ViewSecurity) String() string

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