sqlparser

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Published: Nov 8, 2016 License: BSD-3-Clause Imports: 8 Imported by: 0

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Index

Constants

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const (
	DistinctStr      = "distinct "
	StraightJoinHint = "straight_join "
)

Select.Distinct

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const (
	ForUpdateStr = " for update"
	ShareModeStr = " lock in share mode"
)

Select.Lock

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const (
	UnionStr         = "union"
	UnionAllStr      = "union all"
	UnionDistinctStr = "union distinct"
)

Union.Type

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const (
	CreateStr = "create"
	AlterStr  = "alter"
	DropStr   = "drop"
	RenameStr = "rename"
)

DDL strings.

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const (
	JoinStr             = "join"
	StraightJoinStr     = "straight_join"
	LeftJoinStr         = "left join"
	RightJoinStr        = "right join"
	NaturalJoinStr      = "natural join"
	NaturalLeftJoinStr  = "natural left join"
	NaturalRightJoinStr = "natural right join"
)

JoinTableExpr.Join

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const (
	UseStr    = "use "
	IgnoreStr = "ignore "
	ForceStr  = "force "
)

Index hints.

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const (
	WhereStr  = "where"
	HavingStr = "having"
)

Where.Type

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const (
	EqualStr         = "="
	LessThanStr      = "<"
	GreaterThanStr   = ">"
	LessEqualStr     = "<="
	GreaterEqualStr  = ">="
	NotEqualStr      = "!="
	NullSafeEqualStr = "<=>"
	InStr            = "in"
	NotInStr         = "not in"
	LikeStr          = "like"
	NotLikeStr       = "not like"
	RegexpStr        = "regexp"
	NotRegexpStr     = "not regexp"
)

ComparisonExpr.Operator

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const (
	BetweenStr    = "between"
	NotBetweenStr = "not between"
)

RangeCond.Operator

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const (
	IsNullStr     = "is null"
	IsNotNullStr  = "is not null"
	IsTrueStr     = "is true"
	IsNotTrueStr  = "is not true"
	IsFalseStr    = "is false"
	IsNotFalseStr = "is not false"
)

IsExpr.Operator

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const (
	BitAndStr     = "&"
	BitOrStr      = "|"
	BitXorStr     = "^"
	PlusStr       = "+"
	MinusStr      = "-"
	MultStr       = "*"
	DivStr        = "/"
	ModStr        = "%"
	ShiftLeftStr  = "<<"
	ShiftRightStr = ">>"
)

BinaryExpr.Operator

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const (
	UPlusStr  = '+'
	UMinusStr = '-'
	TildaStr  = '~'
)

UnaryExpr.Operator

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const (
	AscScr  = "asc"
	DescScr = "desc"
)

Order.Direction

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const ALL = 57360
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const ALTER = 57418
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const ANALYZE = 57421
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const AND = 57397
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const AS = 57362
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const ASC = 57364
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const BETWEEN = 57399
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const BY = 57357
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const CASE = 57400
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const COMMENT = 57392
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const CREATE = 57417
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const CROSS = 57382
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const DEFAULT = 57369
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const DELETE = 57351
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const DESC = 57365
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const DESCRIBE = 57431
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const DISTINCT = 57361
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const DROP = 57419
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const DUPLICATE = 57367
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const ELSE = 57403
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const END = 57416
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const EXISTS = 57363
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const EXPLAIN = 57432
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const FALSE = 57395
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const FOR = 57359
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const FORCE = 57385
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const FROM = 57352
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const GE = 57405
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const GROUP = 57354
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const HAVING = 57355
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const ID = 57387
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const IF = 57427
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const IGNORE = 57426
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const IN = 57411
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const INDEX = 57423
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const INNER = 57380
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const INSERT = 57349
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const INTERVAL = 57415
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const INTO = 57366
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const IS = 57408
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const JOIN = 57376
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const KEY = 57368
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const LAST_INSERT_ID = 57373
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const LE = 57404
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const LEFT = 57378
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const LEX_ERROR = 57346
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const LIKE = 57409
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const LIMIT = 57358
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const LIST_ARG = 57391
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const LOCK = 57371
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const NATURAL = 57383
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const NE = 57406
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const NEXT = 57374
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const NOT = 57398
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const NULL = 57393
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const NULL_SAFE_EQUAL = 57407
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const NUMBER = 57389
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const ON = 57386
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const OR = 57396
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const ORDER = 57356
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const OUTER = 57381
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const REGEXP = 57410
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const RENAME = 57420
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const RIGHT = 57379
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const SELECT = 57348
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const SET = 57370
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const SHIFT_LEFT = 57412
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const SHIFT_RIGHT = 57413
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const SHOW = 57430
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const STRAIGHT_JOIN = 57377
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const STRING = 57388
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const TABLE = 57422
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const THEN = 57402
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const TO = 57425
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const TRUE = 57394
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const UNARY = 57414
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const UNION = 57347
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const UNIQUE = 57428
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const UNUSED = 57433
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const UPDATE = 57350
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const USE = 57384
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const USING = 57429
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const VALUE = 57375
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const VALUES = 57372
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const VALUE_ARG = 57390
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const VIEW = 57424
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const WHEN = 57401
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const WHERE = 57353

Variables

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var Aggregates = map[string]bool{
	"avg":          true,
	"bit_and":      true,
	"bit_or":       true,
	"bit_xor":      true,
	"count":        true,
	"group_concat": true,
	"max":          true,
	"min":          true,
	"std":          true,
	"stddev_pop":   true,
	"stddev_samp":  true,
	"stddev":       true,
	"sum":          true,
	"var_pop":      true,
	"var_samp":     true,
	"variance":     true,
}

Aggregates is a map of all aggregate functions.

Functions

func AsInterface

func AsInterface(node ValExpr) (interface{}, error)

AsInterface converts the ValExpr to an interface. It converts ValTuple to []interface{}, ValArg to string, StrVal to sqltypes.String, NumVal to sqltypes.Numeric, NullVal to nil. Otherwise, it returns an error.

func EncodeValue

func EncodeValue(buf *bytes.Buffer, value interface{}) error

EncodeValue encodes one bind variable value into the query.

func FetchBindVar

func FetchBindVar(name string, bindVariables map[string]interface{}) (val interface{}, isList bool, err error)

FetchBindVar resolves the bind variable by fetching it from bindVariables.

func GetTableName

func GetTableName(node SimpleTableExpr) string

GetTableName returns the table name from the SimpleTableExpr only if it's a simple expression. Otherwise, it returns "".

func IsColName

func IsColName(node ValExpr) bool

IsColName returns true if the ValExpr is a *ColName.

func IsNull

func IsNull(node ValExpr) bool

IsNull returns true if the ValExpr is SQL NULL

func IsSimpleTuple

func IsSimpleTuple(node ValExpr) bool

IsSimpleTuple returns true if the ValExpr is a ValTuple that contains simple values or if it's a list arg.

func IsValue

func IsValue(node ValExpr) bool

IsValue returns true if the ValExpr is a string, number or value arg. NULL is not considered to be a value.

func SplitTrailingComments

func SplitTrailingComments(sql string) (query, comments string)

SplitTrailingComments splits the query trailing comments from the query.

func String

func String(node SQLNode) string

String returns a string representation of an SQLNode.

func StringIn

func StringIn(str string, values ...string) bool

StringIn is a convenience function that returns true if str matches any of the values.

func Walk

func Walk(visit Visit, nodes ...SQLNode) error

Walk calls visit on every node. If visit returns true, the underlying nodes are also visited. If it returns an error, walking is interrupted, and the error is returned.

Types

type AliasedTableExpr

type AliasedTableExpr struct {
	Expr  SimpleTableExpr
	As    TableIdent
	Hints *IndexHints
}

AliasedTableExpr represents a table expression coupled with an optional alias or index hint. If As is empty, no alias was used.

func (*AliasedTableExpr) Format

func (node *AliasedTableExpr) Format(buf *TrackedBuffer)

Format formats the node.

func (*AliasedTableExpr) WalkSubtree

func (node *AliasedTableExpr) WalkSubtree(visit Visit) error

WalkSubtree walks the nodes of the subtree

type AndExpr

type AndExpr struct {
	Left, Right BoolExpr
}

AndExpr represents an AND expression.

func (*AndExpr) Format

func (node *AndExpr) Format(buf *TrackedBuffer)

Format formats the node.

func (*AndExpr) WalkSubtree

func (node *AndExpr) WalkSubtree(visit Visit) error

WalkSubtree walks the nodes of the subtree

type BinaryExpr

type BinaryExpr struct {
	Operator    string
	Left, Right Expr
}

BinaryExpr represents a binary value expression.

func (*BinaryExpr) Format

func (node *BinaryExpr) Format(buf *TrackedBuffer)

Format formats the node.

func (*BinaryExpr) WalkSubtree

func (node *BinaryExpr) WalkSubtree(visit Visit) error

WalkSubtree walks the nodes of the subtree

type BoolExpr

type BoolExpr interface {
	Expr
	// contains filtered or unexported methods
}

BoolExpr represents a boolean expression.

type BoolVal

type BoolVal bool

BoolVal is true or false.

func (BoolVal) Format

func (node BoolVal) Format(buf *TrackedBuffer)

Format formats the node.

func (BoolVal) WalkSubtree

func (node BoolVal) WalkSubtree(visit Visit) error

WalkSubtree walks the nodes of the subtree

type CaseExpr

type CaseExpr struct {
	Expr  ValExpr
	Whens []*When
	Else  ValExpr
}

CaseExpr represents a CASE expression.

func (*CaseExpr) Format

func (node *CaseExpr) Format(buf *TrackedBuffer)

Format formats the node.

func (*CaseExpr) WalkSubtree

func (node *CaseExpr) WalkSubtree(visit Visit) error

WalkSubtree walks the nodes of the subtree

type ColIdent

type ColIdent cistring.CIString

ColIdent is a case insensitive SQL identifier. It will be escaped with backquotes if it matches a keyword.

func NewColIdent

func NewColIdent(str string) ColIdent

NewColIdent makes a new ColIdent.

func (ColIdent) Equal

func (node ColIdent) Equal(in ColIdent) bool

Equal performs a case-insensitive compare.

func (ColIdent) EqualString

func (node ColIdent) EqualString(str string) bool

EqualString performs a case-insensitive compare with str.

func (ColIdent) Format

func (node ColIdent) Format(buf *TrackedBuffer)

Format formats the node.

func (ColIdent) Lowered

func (node ColIdent) Lowered() string

Lowered returns a lower-cased column name. This function should generally be used only for optimizing comparisons.

func (ColIdent) Original

func (node ColIdent) Original() string

Original returns the case-preserved column name.

func (ColIdent) String

func (node ColIdent) String() string

func (ColIdent) WalkSubtree

func (node ColIdent) WalkSubtree(visit Visit) error

WalkSubtree walks the nodes of the subtree

type ColName

type ColName struct {
	// Metadata is not populated by the parser.
	// It's a placeholder for analyzers to store
	// additional data, typically info about which
	// table or column this node references.
	Metadata  interface{}
	Name      ColIdent
	Qualifier *TableName
}

ColName represents a column name.

func (*ColName) Format

func (node *ColName) Format(buf *TrackedBuffer)

Format formats the node.

func (*ColName) WalkSubtree

func (node *ColName) WalkSubtree(visit Visit) error

WalkSubtree walks the nodes of the subtree

type ColTuple

type ColTuple interface {
	ValExpr
	// contains filtered or unexported methods
}

ColTuple represents a list of column values. It can be ValTuple, Subquery, ListArg.

type Columns

type Columns []ColIdent

Columns represents an insert column list.

func (Columns) Format

func (node Columns) Format(buf *TrackedBuffer)

Format formats the node.

func (Columns) WalkSubtree

func (node Columns) WalkSubtree(visit Visit) error

WalkSubtree walks the nodes of the subtree

type Comments

type Comments [][]byte

Comments represents a list of comments.

func (Comments) Format

func (node Comments) Format(buf *TrackedBuffer)

Format formats the node.

func (Comments) WalkSubtree

func (node Comments) WalkSubtree(visit Visit) error

WalkSubtree walks the nodes of the subtree

type ComparisonExpr

type ComparisonExpr struct {
	Operator    string
	Left, Right ValExpr
}

ComparisonExpr represents a two-value comparison expression.

func (*ComparisonExpr) Format

func (node *ComparisonExpr) Format(buf *TrackedBuffer)

Format formats the node.

func (*ComparisonExpr) WalkSubtree

func (node *ComparisonExpr) WalkSubtree(visit Visit) error

WalkSubtree walks the nodes of the subtree

type DDL

type DDL struct {
	Action   string
	Table    TableIdent
	NewName  TableIdent
	IfExists bool
}

DDL represents a CREATE, ALTER, DROP or RENAME statement. Table is set for AlterStr, DropStr, RenameStr. NewName is set for AlterStr, CreateStr, RenameStr.

func (*DDL) Format

func (node *DDL) Format(buf *TrackedBuffer)

Format formats the node.

func (*DDL) WalkSubtree

func (node *DDL) WalkSubtree(visit Visit) error

WalkSubtree walks the nodes of the subtree

type Delete

type Delete struct {
	Comments Comments
	Table    *TableName
	Where    *Where
	OrderBy  OrderBy
	Limit    *Limit
}

Delete represents a DELETE statement.

func (*Delete) Format

func (node *Delete) Format(buf *TrackedBuffer)

Format formats the node.

func (*Delete) WalkSubtree

func (node *Delete) WalkSubtree(visit Visit) error

WalkSubtree walks the nodes of the subtree

type ExistsExpr

type ExistsExpr struct {
	Subquery *Subquery
}

ExistsExpr represents an EXISTS expression.

func (*ExistsExpr) Format

func (node *ExistsExpr) Format(buf *TrackedBuffer)

Format formats the node.

func (*ExistsExpr) WalkSubtree

func (node *ExistsExpr) WalkSubtree(visit Visit) error

WalkSubtree walks the nodes of the subtree

type Expr

type Expr interface {
	SQLNode
	// contains filtered or unexported methods
}

Expr represents an expression.

type FuncExpr

type FuncExpr struct {
	Name     string
	Distinct bool
	Exprs    SelectExprs
}

FuncExpr represents a function call.

func (*FuncExpr) Format

func (node *FuncExpr) Format(buf *TrackedBuffer)

Format formats the node.

func (*FuncExpr) IsAggregate

func (node *FuncExpr) IsAggregate() bool

IsAggregate returns true if the function is an aggregate.

func (*FuncExpr) WalkSubtree

func (node *FuncExpr) WalkSubtree(visit Visit) error

WalkSubtree walks the nodes of the subtree

type GroupBy

type GroupBy []ValExpr

GroupBy represents a GROUP BY clause.

func (GroupBy) Format

func (node GroupBy) Format(buf *TrackedBuffer)

Format formats the node.

func (GroupBy) WalkSubtree

func (node GroupBy) WalkSubtree(visit Visit) error

WalkSubtree walks the nodes of the subtree

type IndexHints

type IndexHints struct {
	Type    string
	Indexes []ColIdent
}

IndexHints represents a list of index hints.

func (*IndexHints) Format

func (node *IndexHints) Format(buf *TrackedBuffer)

Format formats the node.

func (*IndexHints) WalkSubtree

func (node *IndexHints) WalkSubtree(visit Visit) error

WalkSubtree walks the nodes of the subtree

type Insert

type Insert struct {
	Comments Comments
	Ignore   string
	Table    *TableName
	Columns  Columns
	Rows     InsertRows
	OnDup    OnDup
}

Insert represents an INSERT statement.

func (*Insert) Format

func (node *Insert) Format(buf *TrackedBuffer)

Format formats the node.

func (*Insert) WalkSubtree

func (node *Insert) WalkSubtree(visit Visit) error

WalkSubtree walks the nodes of the subtree

type InsertRows

type InsertRows interface {
	SQLNode
	// contains filtered or unexported methods
}

InsertRows represents the rows for an INSERT statement.

type IntervalExpr

type IntervalExpr struct {
	Expr Expr
	Unit ColIdent
}

IntervalExpr represents a date-time INTERVAL expression.

func (*IntervalExpr) Format

func (node *IntervalExpr) Format(buf *TrackedBuffer)

Format formats the node.

func (*IntervalExpr) WalkSubtree

func (node *IntervalExpr) WalkSubtree(visit Visit) error

WalkSubtree walks the nodes of the subtree

type IsExpr

type IsExpr struct {
	Operator string
	Expr     Expr
}

IsExpr represents an IS ... or an IS NOT ... expression.

func (*IsExpr) Format

func (node *IsExpr) Format(buf *TrackedBuffer)

Format formats the node.

func (*IsExpr) WalkSubtree

func (node *IsExpr) WalkSubtree(visit Visit) error

WalkSubtree walks the nodes of the subtree

type JoinTableExpr

type JoinTableExpr struct {
	LeftExpr  TableExpr
	Join      string
	RightExpr TableExpr
	On        BoolExpr
}

JoinTableExpr represents a TableExpr that's a JOIN operation.

func (*JoinTableExpr) Format

func (node *JoinTableExpr) Format(buf *TrackedBuffer)

Format formats the node.

func (*JoinTableExpr) WalkSubtree

func (node *JoinTableExpr) WalkSubtree(visit Visit) error

WalkSubtree walks the nodes of the subtree

type Limit

type Limit struct {
	Offset, Rowcount ValExpr
}

Limit represents a LIMIT clause.

func (*Limit) Format

func (node *Limit) Format(buf *TrackedBuffer)

Format formats the node.

func (*Limit) WalkSubtree

func (node *Limit) WalkSubtree(visit Visit) error

WalkSubtree walks the nodes of the subtree

type ListArg

type ListArg []byte

ListArg represents a named list argument.

func (ListArg) Format

func (node ListArg) Format(buf *TrackedBuffer)

Format formats the node.

func (ListArg) WalkSubtree

func (node ListArg) WalkSubtree(visit Visit) error

WalkSubtree walks the nodes of the subtree

type Nextval

type Nextval struct{}

Nextval defines the NEXT VALUE expression.

func (Nextval) Format

func (node Nextval) Format(buf *TrackedBuffer)

Format formats the node.

func (Nextval) WalkSubtree

func (node Nextval) WalkSubtree(visit Visit) error

WalkSubtree walks the nodes of the subtree

type NonStarExpr

type NonStarExpr struct {
	Expr Expr
	As   ColIdent
}

NonStarExpr defines a non-'*' select expr.

func (*NonStarExpr) Format

func (node *NonStarExpr) Format(buf *TrackedBuffer)

Format formats the node.

func (*NonStarExpr) WalkSubtree

func (node *NonStarExpr) WalkSubtree(visit Visit) error

WalkSubtree walks the nodes of the subtree

type NotExpr

type NotExpr struct {
	Expr BoolExpr
}

NotExpr represents a NOT expression.

func (*NotExpr) Format

func (node *NotExpr) Format(buf *TrackedBuffer)

Format formats the node.

func (*NotExpr) WalkSubtree

func (node *NotExpr) WalkSubtree(visit Visit) error

WalkSubtree walks the nodes of the subtree

type NullVal

type NullVal struct{}

NullVal represents a NULL value.

func (*NullVal) Format

func (node *NullVal) Format(buf *TrackedBuffer)

Format formats the node.

func (*NullVal) WalkSubtree

func (node *NullVal) WalkSubtree(visit Visit) error

WalkSubtree walks the nodes of the subtree

type NumVal

type NumVal []byte

NumVal represents a number.

func (NumVal) Format

func (node NumVal) Format(buf *TrackedBuffer)

Format formats the node.

func (NumVal) WalkSubtree

func (node NumVal) WalkSubtree(visit Visit) error

WalkSubtree walks the nodes of the subtree

type OnDup

type OnDup UpdateExprs

OnDup represents an ON DUPLICATE KEY clause.

func (OnDup) Format

func (node OnDup) Format(buf *TrackedBuffer)

Format formats the node.

func (OnDup) WalkSubtree

func (node OnDup) WalkSubtree(visit Visit) error

WalkSubtree walks the nodes of the subtree

type OrExpr

type OrExpr struct {
	Left, Right BoolExpr
}

OrExpr represents an OR expression.

func (*OrExpr) Format

func (node *OrExpr) Format(buf *TrackedBuffer)

Format formats the node.

func (*OrExpr) WalkSubtree

func (node *OrExpr) WalkSubtree(visit Visit) error

WalkSubtree walks the nodes of the subtree

type Order

type Order struct {
	Expr      ValExpr
	Direction string
}

Order represents an ordering expression.

func (*Order) Format

func (node *Order) Format(buf *TrackedBuffer)

Format formats the node.

func (*Order) WalkSubtree

func (node *Order) WalkSubtree(visit Visit) error

WalkSubtree walks the nodes of the subtree

type OrderBy

type OrderBy []*Order

OrderBy represents an ORDER By clause.

func (OrderBy) Format

func (node OrderBy) Format(buf *TrackedBuffer)

Format formats the node.

func (OrderBy) WalkSubtree

func (node OrderBy) WalkSubtree(visit Visit) error

WalkSubtree walks the nodes of the subtree

type Other

type Other struct{}

Other represents a SHOW, DESCRIBE, or EXPLAIN statement. It should be used only as an indicator. It does not contain the full AST for the statement.

func (*Other) Format

func (node *Other) Format(buf *TrackedBuffer)

Format formats the node.

func (*Other) WalkSubtree

func (node *Other) WalkSubtree(visit Visit) error

WalkSubtree walks the nodes of the subtree

type ParenBoolExpr

type ParenBoolExpr struct {
	Expr BoolExpr
}

ParenBoolExpr represents a parenthesized boolean expression.

func (*ParenBoolExpr) Format

func (node *ParenBoolExpr) Format(buf *TrackedBuffer)

Format formats the node.

func (*ParenBoolExpr) WalkSubtree

func (node *ParenBoolExpr) WalkSubtree(visit Visit) error

WalkSubtree walks the nodes of the subtree

type ParenTableExpr

type ParenTableExpr struct {
	Exprs TableExprs
}

ParenTableExpr represents a parenthesized list of TableExpr.

func (*ParenTableExpr) Format

func (node *ParenTableExpr) Format(buf *TrackedBuffer)

Format formats the node.

func (*ParenTableExpr) WalkSubtree

func (node *ParenTableExpr) WalkSubtree(visit Visit) error

WalkSubtree walks the nodes of the subtree

type ParsedQuery

type ParsedQuery struct {
	Query string
	// contains filtered or unexported fields
}

ParsedQuery represents a parsed query where bind locations are precompued for fast substitutions.

func GenerateParsedQuery

func GenerateParsedQuery(node SQLNode) *ParsedQuery

GenerateParsedQuery returns a ParsedQuery of the ast.

func (*ParsedQuery) GenerateQuery

func (pq *ParsedQuery) GenerateQuery(bindVariables map[string]interface{}) ([]byte, error)

GenerateQuery generates a query by substituting the specified bindVariables.

func (*ParsedQuery) MarshalJSON

func (pq *ParsedQuery) MarshalJSON() ([]byte, error)

MarshalJSON is a custom JSON marshaler for ParsedQuery.

type RangeCond

type RangeCond struct {
	Operator string
	Left     ValExpr
	From, To ValExpr
}

RangeCond represents a BETWEEN or a NOT BETWEEN expression.

func (*RangeCond) Format

func (node *RangeCond) Format(buf *TrackedBuffer)

Format formats the node.

func (*RangeCond) WalkSubtree

func (node *RangeCond) WalkSubtree(visit Visit) error

WalkSubtree walks the nodes of the subtree

type RowTuple

type RowTuple interface {
	ValExpr
	// contains filtered or unexported methods
}

RowTuple represents a row of values. It can be ValTuple, Subquery.

type SQLNode

type SQLNode interface {
	Format(buf *TrackedBuffer)
	// WalkSubtree calls visit on all underlying nodes
	// of the subtree, but not the current one. Walking
	// must be interrupted if visit returns an error.
	WalkSubtree(visit Visit) error
}

SQLNode defines the interface for all nodes generated by the parser.

type Select

type Select struct {
	Comments    Comments
	Distinct    string
	Hints       string
	SelectExprs SelectExprs
	From        TableExprs
	Where       *Where
	GroupBy     GroupBy
	Having      *Where
	OrderBy     OrderBy
	Limit       *Limit
	Lock        string
}

Select represents a SELECT statement.

func (*Select) AddHaving

func (node *Select) AddHaving(expr BoolExpr)

AddHaving adds the boolean expression to the HAVING clause as an AND condition. If the expression is an OR clause, it parenthesizes it. Currently, the OR operator is the only one that's lower precedence than AND.

func (*Select) AddWhere

func (node *Select) AddWhere(expr BoolExpr)

AddWhere adds the boolean expression to the WHERE clause as an AND condition. If the expression is an OR clause, it parenthesizes it. Currently, the OR operator is the only one that's lower precedence than AND.

func (*Select) Format

func (node *Select) Format(buf *TrackedBuffer)

Format formats the node.

func (*Select) WalkSubtree

func (node *Select) WalkSubtree(visit Visit) error

WalkSubtree walks the nodes of the subtree

type SelectExpr

type SelectExpr interface {
	SQLNode
	// contains filtered or unexported methods
}

SelectExpr represents a SELECT expression.

type SelectExprs

type SelectExprs []SelectExpr

SelectExprs represents SELECT expressions.

func (SelectExprs) Format

func (node SelectExprs) Format(buf *TrackedBuffer)

Format formats the node.

func (SelectExprs) WalkSubtree

func (node SelectExprs) WalkSubtree(visit Visit) error

WalkSubtree walks the nodes of the subtree

type SelectStatement

type SelectStatement interface {
	SQLNode
	// contains filtered or unexported methods
}

SelectStatement any SELECT statement.

type Set

type Set struct {
	Comments Comments
	Exprs    UpdateExprs
}

Set represents a SET statement.

func (*Set) Format

func (node *Set) Format(buf *TrackedBuffer)

Format formats the node.

func (*Set) WalkSubtree

func (node *Set) WalkSubtree(visit Visit) error

WalkSubtree walks the nodes of the subtree

type SimpleTableExpr

type SimpleTableExpr interface {
	SQLNode
	// contains filtered or unexported methods
}

SimpleTableExpr represents a simple table expression.

type StarExpr

type StarExpr struct {
	TableName TableIdent
}

StarExpr defines a '*' or 'table.*' expression.

func (*StarExpr) Format

func (node *StarExpr) Format(buf *TrackedBuffer)

Format formats the node.

func (*StarExpr) WalkSubtree

func (node *StarExpr) WalkSubtree(visit Visit) error

WalkSubtree walks the nodes of the subtree

type Statement

type Statement interface {
	SQLNode
	// contains filtered or unexported methods
}

Statement represents a statement.

func Parse

func Parse(sql string) (Statement, error)

Parse parses the sql and returns a Statement, which is the AST representation of the query.

type StrVal

type StrVal []byte

StrVal represents a string value.

func (StrVal) Format

func (node StrVal) Format(buf *TrackedBuffer)

Format formats the node.

func (StrVal) WalkSubtree

func (node StrVal) WalkSubtree(visit Visit) error

WalkSubtree walks the nodes of the subtree

type Subquery

type Subquery struct {
	Select SelectStatement
}

Subquery represents a subquery.

func (*Subquery) Format

func (node *Subquery) Format(buf *TrackedBuffer)

Format formats the node.

func (*Subquery) WalkSubtree

func (node *Subquery) WalkSubtree(visit Visit) error

WalkSubtree walks the nodes of the subtree

type TableExpr

type TableExpr interface {
	SQLNode
	// contains filtered or unexported methods
}

TableExpr represents a table expression.

type TableExprs

type TableExprs []TableExpr

TableExprs represents a list of table expressions.

func (TableExprs) Format

func (node TableExprs) Format(buf *TrackedBuffer)

Format formats the node.

func (TableExprs) WalkSubtree

func (node TableExprs) WalkSubtree(visit Visit) error

WalkSubtree walks the nodes of the subtree

type TableIdent

type TableIdent string

TableIdent is a case sensitive SQL identifier. It will be escaped with backquotes if it matches a keyword.

func (TableIdent) Format

func (node TableIdent) Format(buf *TrackedBuffer)

Format formats the node.

func (TableIdent) WalkSubtree

func (node TableIdent) WalkSubtree(visit Visit) error

WalkSubtree walks the nodes of the subtree

type TableName

type TableName struct {
	Name, Qualifier TableIdent
}

TableName represents a table name. Qualifier, if specified, represents a database. It's generally not supported because vitess has its own rules about which database to send a query to.

func (*TableName) Format

func (node *TableName) Format(buf *TrackedBuffer)

Format formats the node.

func (*TableName) IsEmpty

func (node *TableName) IsEmpty() bool

IsEmpty returns true if TableName is nil or empty.

func (*TableName) WalkSubtree

func (node *TableName) WalkSubtree(visit Visit) error

WalkSubtree walks the nodes of the subtree

type Tokenizer

type Tokenizer struct {
	InStream      *strings.Reader
	AllowComments bool
	ForceEOF      bool

	Position int

	LastError string

	ParseTree Statement
	// contains filtered or unexported fields
}

Tokenizer is the struct used to generate SQL tokens for the parser.

func NewStringTokenizer

func NewStringTokenizer(sql string) *Tokenizer

NewStringTokenizer creates a new Tokenizer for the sql string.

func (*Tokenizer) Error

func (tkn *Tokenizer) Error(err string)

Error is called by go yacc if there's a parsing error.

func (*Tokenizer) Lex

func (tkn *Tokenizer) Lex(lval *yySymType) int

Lex returns the next token form the Tokenizer. This function is used by go yacc.

func (*Tokenizer) Scan

func (tkn *Tokenizer) Scan() (int, []byte)

Scan scans the tokenizer for the next token and returns the token type and an optional value.

type TrackedBuffer

type TrackedBuffer struct {
	*bytes.Buffer
	// contains filtered or unexported fields
}

TrackedBuffer is used to rebuild a query from the ast. bindLocations keeps track of locations in the buffer that use bind variables for efficient future substitutions. nodeFormatter is the formatting function the buffer will use to format a node. By default(nil), it's FormatNode. But you can supply a different formatting function if you want to generate a query that's different from the default.

func NewTrackedBuffer

func NewTrackedBuffer(nodeFormatter func(buf *TrackedBuffer, node SQLNode)) *TrackedBuffer

NewTrackedBuffer creates a new TrackedBuffer.

func (*TrackedBuffer) HasBindVars

func (buf *TrackedBuffer) HasBindVars() bool

HasBindVars returns true if the parsed query uses bind vars.

func (*TrackedBuffer) Myprintf

func (buf *TrackedBuffer) Myprintf(format string, values ...interface{})

Myprintf mimics fmt.Fprintf(buf, ...), but limited to Node(%v), Node.Value(%s) and string(%s). It also allows a %a for a value argument, in which case it adds tracking info for future substitutions.

The name must be something other than the usual Printf() to avoid "go vet" warnings due to our custom format specifiers.

func (*TrackedBuffer) ParsedQuery

func (buf *TrackedBuffer) ParsedQuery() *ParsedQuery

ParsedQuery returns a ParsedQuery that contains bind locations for easy substitution.

func (*TrackedBuffer) WriteArg

func (buf *TrackedBuffer) WriteArg(arg string)

WriteArg writes a value argument into the buffer along with tracking information for future substitutions. arg must contain the ":" or "::" prefix.

type TupleEqualityList

type TupleEqualityList struct {
	Columns []string
	Rows    [][]sqltypes.Value
}

TupleEqualityList is for generating equality constraints for tables that have composite primary keys.

func (*TupleEqualityList) Encode

func (tpl *TupleEqualityList) Encode(buf *bytes.Buffer) error

Encode generates the where clause constraints for the tuple equality.

type UnaryExpr

type UnaryExpr struct {
	Operator byte
	Expr     Expr
}

UnaryExpr represents a unary value expression.

func (*UnaryExpr) Format

func (node *UnaryExpr) Format(buf *TrackedBuffer)

Format formats the node.

func (*UnaryExpr) WalkSubtree

func (node *UnaryExpr) WalkSubtree(visit Visit) error

WalkSubtree walks the nodes of the subtree

type Union

type Union struct {
	Type        string
	Left, Right SelectStatement
}

Union represents a UNION statement.

func (*Union) Format

func (node *Union) Format(buf *TrackedBuffer)

Format formats the node.

func (*Union) WalkSubtree

func (node *Union) WalkSubtree(visit Visit) error

WalkSubtree walks the nodes of the subtree

type Update

type Update struct {
	Comments Comments
	Table    *TableName
	Exprs    UpdateExprs
	Where    *Where
	OrderBy  OrderBy
	Limit    *Limit
}

Update represents an UPDATE statement.

func (*Update) Format

func (node *Update) Format(buf *TrackedBuffer)

Format formats the node.

func (*Update) WalkSubtree

func (node *Update) WalkSubtree(visit Visit) error

WalkSubtree walks the nodes of the subtree

type UpdateExpr

type UpdateExpr struct {
	Name ColIdent
	Expr ValExpr
}

UpdateExpr represents an update expression.

func (*UpdateExpr) Format

func (node *UpdateExpr) Format(buf *TrackedBuffer)

Format formats the node.

func (*UpdateExpr) WalkSubtree

func (node *UpdateExpr) WalkSubtree(visit Visit) error

WalkSubtree walks the nodes of the subtree

type UpdateExprs

type UpdateExprs []*UpdateExpr

UpdateExprs represents a list of update expressions.

func (UpdateExprs) Format

func (node UpdateExprs) Format(buf *TrackedBuffer)

Format formats the node.

func (UpdateExprs) WalkSubtree

func (node UpdateExprs) WalkSubtree(visit Visit) error

WalkSubtree walks the nodes of the subtree

type ValArg

type ValArg []byte

ValArg represents a named bind var argument.

func (ValArg) Format

func (node ValArg) Format(buf *TrackedBuffer)

Format formats the node.

func (ValArg) WalkSubtree

func (node ValArg) WalkSubtree(visit Visit) error

WalkSubtree walks the nodes of the subtree

type ValExpr

type ValExpr interface {
	Expr
	// contains filtered or unexported methods
}

ValExpr represents a value expression.

type ValExprs

type ValExprs []ValExpr

ValExprs represents a list of value expressions. It's not a valid expression because it's not parenthesized.

func (ValExprs) Format

func (node ValExprs) Format(buf *TrackedBuffer)

Format formats the node.

func (ValExprs) WalkSubtree

func (node ValExprs) WalkSubtree(visit Visit) error

WalkSubtree walks the nodes of the subtree

type ValTuple

type ValTuple ValExprs

ValTuple represents a tuple of actual values.

func (ValTuple) Format

func (node ValTuple) Format(buf *TrackedBuffer)

Format formats the node.

func (ValTuple) WalkSubtree

func (node ValTuple) WalkSubtree(visit Visit) error

WalkSubtree walks the nodes of the subtree

type Values

type Values []RowTuple

Values represents a VALUES clause.

func (Values) Format

func (node Values) Format(buf *TrackedBuffer)

Format formats the node.

func (Values) WalkSubtree

func (node Values) WalkSubtree(visit Visit) error

WalkSubtree walks the nodes of the subtree

type Visit

type Visit func(node SQLNode) (kontinue bool, err error)

Visit defines the signature of a function that can be used to visit all nodes of a parse tree.

type When

type When struct {
	Cond BoolExpr
	Val  ValExpr
}

When represents a WHEN sub-expression.

func (*When) Format

func (node *When) Format(buf *TrackedBuffer)

Format formats the node.

func (*When) WalkSubtree

func (node *When) WalkSubtree(visit Visit) error

WalkSubtree walks the nodes of the subtree

type Where

type Where struct {
	Type string
	Expr BoolExpr
}

Where represents a WHERE or HAVING clause.

func NewWhere

func NewWhere(typ string, expr BoolExpr) *Where

NewWhere creates a WHERE or HAVING clause out of a BoolExpr. If the expression is nil, it returns nil.

func (*Where) Format

func (node *Where) Format(buf *TrackedBuffer)

Format formats the node.

func (*Where) WalkSubtree

func (node *Where) WalkSubtree(visit Visit) error

WalkSubtree walks the nodes of the subtree

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