sqlparser

package
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 Go to latest Published: Jul 24, 2014 License: BSD-3-Clause Imports: 10 Imported by: 0

Documentation

Index

Constants

View Source 
const (
	AST_FOR_UPDATE = " for update"
	AST_SHARE_MODE = " lock in share mode"
)

Select.Lock

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const (
	AST_UNION     = "union"
	AST_UNION_ALL = "union all"
	AST_SET_MINUS = "minus"
	AST_EXCEPT    = "except"
	AST_INTERSECT = "intersect"
)

Union.Type

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const (
	AST_CREATE = "create"
	AST_ALTER  = "alter"
	AST_DROP   = "drop"
	AST_RENAME = "rename"
)
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const (
	AST_JOIN          = "join"
	AST_STRAIGHT_JOIN = "straight_join"
	AST_LEFT_JOIN     = "left join"
	AST_RIGHT_JOIN    = "right join"
	AST_CROSS_JOIN    = "cross join"
	AST_NATURAL_JOIN  = "natural join"
)

JoinTableExpr.Join

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const (
	AST_USE    = "use"
	AST_IGNORE = "ignore"
	AST_FORCE  = "force"
)
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const (
	AST_WHERE  = "where"
	AST_HAVING = "having"
)

Where.Type

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const (
	AST_EQ       = "="
	AST_LT       = "<"
	AST_GT       = ">"
	AST_LE       = "<="
	AST_GE       = ">="
	AST_NE       = "!="
	AST_NSE      = "<=>"
	AST_IN       = "in"
	AST_NOT_IN   = "not in"
	AST_LIKE     = "like"
	AST_NOT_LIKE = "not like"
)

ComparisonExpr.Operator

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const (
	AST_BETWEEN     = "between"
	AST_NOT_BETWEEN = "not between"
)

RangeCond.Operator

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const (
	AST_IS_NULL     = "is null"
	AST_IS_NOT_NULL = "is not null"
)

NullCheck.Operator

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const (
	AST_BITAND = '&'
	AST_BITOR  = '|'
	AST_BITXOR = '^'
	AST_PLUS   = '+'
	AST_MINUS  = '-'
	AST_MULT   = '*'
	AST_DIV    = '/'
	AST_MOD    = '%'
)

BinaryExpr.Operator

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const (
	AST_UPLUS  = '+'
	AST_UMINUS = '-'
	AST_TILDA  = '~'
)

UnaryExpr.Operator

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const (
	AST_ASC  = "asc"
	AST_DESC = "desc"
)

Order.Direction

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const (
	NO_MATCH      = scoreValue(-1)
	PERFECT_SCORE = scoreValue(0)
)
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const (
	EID_NODE = iota
	VALUE_NODE
	LIST_NODE
	OTHER_NODE
)
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const ALL = 57359
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const ALTER = 57411
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const AND = 57401
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const AS = 57361
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const ASC = 57368
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const (
	AST_DISTINCT = "distinct "
)

Select.Distinct

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const BETWEEN = 57366
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const BY = 57356
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const CASE = 57405
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const COMMENT = 57381
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const CREATE = 57410
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const CROSS = 57396
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const DEFAULT = 57374
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const DELETE = 57350
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const DESC = 57369
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const DISTINCT = 57360
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const DROP = 57412
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const DUPLICATE = 57372
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const ELSE = 57408
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const END = 57409
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const EOFCHAR = 0x100
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const EXCEPT = 57388
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const EXISTS = 57362
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const FOR = 57358
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const FORCE = 57399
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const FROM = 57351
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const GE = 57383
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const GROUP = 57353
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const HAVING = 57354
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const ID = 57377
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const IF = 57419
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const IGNORE = 57418
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const IN = 57363
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const INDEX = 57415
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const INNER = 57394
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const INSERT = 57348
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const INTERSECT = 57389
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const INTO = 57371
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const IS = 57364
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const JOIN = 57390
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const KEY = 57373
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const LE = 57382
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const LEFT = 57392
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const LEX_ERROR = 57346
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const LIKE = 57365
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const LIMIT = 57357
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const LOCK = 57376
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const MINUS = 57387
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const NATURAL = 57397
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const NE = 57384
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const NOT = 57403
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const NULL = 57367
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const NULL_SAFE_EQUAL = 57385
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const NUMBER = 57379
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const ON = 57400
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const OR = 57402
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const ORDER = 57355
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const OUTER = 57395
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const RENAME = 57413
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const RIGHT = 57393
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const SELECT = 57347
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const SET = 57375
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const STRAIGHT_JOIN = 57391
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const STRING = 57378
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const TABLE = 57414
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const THEN = 57407
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const TO = 57417
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const UNARY = 57404
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const UNION = 57386
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const UNIQUE = 57420
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const UPDATE = 57349
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const USE = 57398
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const USING = 57421
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const VALUES = 57370
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const VALUE_ARG = 57380
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const VIEW = 57416
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const WHEN = 57406
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const WHERE = 57352

Variables

View Source 
var (
	SHARE        = []byte("share")
	MODE         = []byte("mode")
	IF_BYTES     = []byte("if")
	VALUES_BYTES = []byte("values")
)

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. Otherwise, it returns an error.

func EncodeValue 

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

func ForceEOF 

func ForceEOF(yylex interface{})

func FormatImpossible 

func FormatImpossible(buf *TrackedBuffer, node SQLNode)

FormatImpossible is a callback function used by TrackedBuffer to generate a modified version of the query where all selects have impossible where clauses. It overrides a few node types and passes the rest down to the default FormatNode.

func GetColName 

func GetColName(node Expr) string

GetColName returns the column name, only if it's a simple expression. Otherwise, it returns "".

func GetDBName 

func GetDBName(sql string) (string, error)

GetDBName parses the specified DML and returns the db name if it was used to qualify the table name. It returns an error if parsing fails or if the statement is not a DML.

func GetShardList 

func GetShardList(sql string, bindVariables map[string]interface{}, tabletKeys []key.KeyspaceId) (shardlist []int, err error)

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 HasINClause 

func HasINClause(conditions []BoolExpr) bool

HasINCaluse returns true if an yof the conditions has an IN clause.

func IsColName 

func IsColName(node ValExpr) bool

IsColName returns true if the ValExpr is a *ColName.

func IsSimpleTuple 

func IsSimpleTuple(node ValExpr) bool

IsSimpleTuple returns true if the ValExpr is a ValTuple that contains simple values.

func IsValue 

func IsValue(node ValExpr) bool

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

func SetAllowComments 

func SetAllowComments(yylex interface{}, allow bool)

func SetParseTree 

func SetParseTree(yylex interface{}, stmt Statement)

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.

Types

type AliasedTableExpr 

type AliasedTableExpr struct {
	Expr  SimpleTableExpr
	As    []byte
	Hints *IndexHints
}

AliasedTableExpr represents a table expression coupled with an optional alias or index hint.

func (*AliasedTableExpr) Format 

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

func (*AliasedTableExpr) ITableExpr 

func (*AliasedTableExpr) ITableExpr()

type AndExpr 

type AndExpr struct {
	Left, Right BoolExpr
}

AndExpr represents an AND expression.

func (*AndExpr) Format 

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

func (*AndExpr) IBoolExpr 

func (*AndExpr) IBoolExpr()

func (*AndExpr) IExpr 

func (*AndExpr) IExpr()

type BinaryExpr 

type BinaryExpr struct {
	Operator    byte
	Left, Right Expr
}

BinaryExpr represents a binary value expression.

func (*BinaryExpr) Format 

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

func (*BinaryExpr) IExpr 

func (*BinaryExpr) IExpr()

func (*BinaryExpr) IValExpr 

func (*BinaryExpr) IValExpr()

type BindLocation 

type BindLocation struct {
	Offset, Length int
}

type BoolExpr 

type BoolExpr interface {
	IBoolExpr()
	Expr
}

BoolExpr represents a boolean expression.

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)

func (*CaseExpr) IExpr 

func (*CaseExpr) IExpr()

func (*CaseExpr) IValExpr 

func (*CaseExpr) IValExpr()

type ColName 

type ColName struct {
	Name, Qualifier []byte
}

ColName represents a column name.

func (*ColName) Format 

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

func (*ColName) IExpr 

func (*ColName) IExpr()

func (*ColName) IValExpr 

func (*ColName) IValExpr()

type Columns 

type Columns []SelectExpr

Columns represents an insert column list. The syntax for Columns is a subset of SelectExprs. So, it's castable to a SelectExprs and can be analyzed as such.

func (Columns) Format 

func (node Columns) Format(buf *TrackedBuffer)

type Comments 

type Comments [][]byte

Comments represents a list of comments.

func (Comments) Format 

func (node Comments) Format(buf *TrackedBuffer)

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)

func (*ComparisonExpr) IBoolExpr 

func (*ComparisonExpr) IBoolExpr()

func (*ComparisonExpr) IExpr 

func (*ComparisonExpr) IExpr()

type DDL 

type DDL struct {
	Action  string
	Table   []byte
	NewName []byte
}

DDL represents a CREATE, ALTER, DROP or RENAME statement. Table is set for AST_ALTER, AST_DROP, AST_RENAME. NewName is set for AST_ALTER, AST_CREATE, AST_RENAME.

func (*DDL) Format 

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

func (*DDL) IStatement 

func (*DDL) IStatement()

type DDLPlan 

type DDLPlan struct {
	Action    string
	TableName string
	NewName   string
}

func DDLParse 

func DDLParse(sql string) (plan *DDLPlan)

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)

func (*Delete) IStatement 

func (*Delete) IStatement()

type EncoderFunc 

type EncoderFunc func(value interface{}) ([]byte, error)

type ExecPlan 

type ExecPlan struct {
	PlanId    PlanType
	Reason    ReasonType
	TableName string

	// FieldQuery is used to fetch field info
	FieldQuery *ParsedQuery

	// FullQuery will be set for all plans.
	FullQuery *ParsedQuery

	// For PK plans, only OuterQuery is set.
	// For SUBQUERY plans, Subquery is also set.
	// IndexUsed is set only for PLAN_SELECT_SUBQUERY
	OuterQuery *ParsedQuery
	Subquery   *ParsedQuery
	IndexUsed  string

	// For selects, columns to be returned
	// For PLAN_INSERT_SUBQUERY, columns to be inserted
	ColumnNumbers []int

	// PLAN_PK_EQUAL, PLAN_DML_PK: where clause values
	// PLAN_PK_IN: IN clause values
	// PLAN_INSERT_PK: values clause
	PKValues []interface{}

	// For update: set clause if pk is changing
	SecondaryPKValues []interface{}

	// For PLAN_INSERT_SUBQUERY: pk columns in the subquery result
	SubqueryPKColumns []int

	// PLAN_SET
	SetKey   string
	SetValue interface{}
}

ExecPlan is built for selects and DMLs. PK Values values within ExecPlan can be: sqltypes.Value: sourced form the query, or string: bind variable name starting with ':', or nil if no value was specified

func ExecParse 

func ExecParse(sql string, getTable TableGetter) (plan *ExecPlan, err error)

type ExistsExpr 

type ExistsExpr struct {
	Subquery *Subquery
}

ExistsExpr represents an EXISTS expression.

func (*ExistsExpr) Format 

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

func (*ExistsExpr) IBoolExpr 

func (*ExistsExpr) IBoolExpr()

func (*ExistsExpr) IExpr 

func (*ExistsExpr) IExpr()

type Expr 

type Expr interface {
	IExpr()
	SQLNode
}

Expr represents an expression.

type FuncExpr 

type FuncExpr struct {
	Name     []byte
	Distinct bool
	Exprs    SelectExprs
}

FuncExpr represents a function call.

func (*FuncExpr) Format 

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

func (*FuncExpr) IExpr 

func (*FuncExpr) IExpr()

func (*FuncExpr) IValExpr 

func (*FuncExpr) IValExpr()

type GroupBy 

type GroupBy []ValExpr

GroupBy represents a GROUP BY clause.

func (GroupBy) Format 

func (node GroupBy) Format(buf *TrackedBuffer)

type IndexHints 

type IndexHints struct {
	Type    string
	Indexes [][]byte
}

IndexHints represents a list of index hints.

func (*IndexHints) Format 

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

type IndexScore 

type IndexScore struct {
	Index       *schema.Index
	ColumnMatch []bool
	MatchFailed bool
}

func NewIndexScore 

func NewIndexScore(index *schema.Index) *IndexScore

func NewIndexScoreList 

func NewIndexScoreList(indexes []*schema.Index) []*IndexScore

func (*IndexScore) FindMatch 

func (is *IndexScore) FindMatch(columnName string) int

func (*IndexScore) GetScore 

func (is *IndexScore) GetScore() scoreValue

type Insert 

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

Insert represents an INSERT statement.

func (*Insert) Format 

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

func (*Insert) IStatement 

func (*Insert) IStatement()

type InsertRows 

type InsertRows interface {
	IInsertRows()
	SQLNode
}

InsertRows represents the rows for an INSERT statement.

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)

func (*JoinTableExpr) ITableExpr 

func (*JoinTableExpr) ITableExpr()

type Limit 

type Limit struct {
	Offset, Rowcount ValExpr
}

Limit represents a LIMIT clause.

func (*Limit) Format 

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

type NonStarExpr 

type NonStarExpr struct {
	Expr Expr
	As   []byte
}

NonStarExpr defines a non-'*' select expr.

func (*NonStarExpr) Format 

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

func (*NonStarExpr) ISelectExpr 

func (*NonStarExpr) ISelectExpr()

type NotExpr 

type NotExpr struct {
	Expr BoolExpr
}

NotExpr represents a NOT expression.

func (*NotExpr) Format 

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

func (*NotExpr) IBoolExpr 

func (*NotExpr) IBoolExpr()

func (*NotExpr) IExpr 

func (*NotExpr) IExpr()

type NullCheck 

type NullCheck struct {
	Operator string
	Expr     ValExpr
}

NullCheck represents an IS NULL or an IS NOT NULL expression.

func (*NullCheck) Format 

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

func (*NullCheck) IBoolExpr 

func (*NullCheck) IBoolExpr()

func (*NullCheck) IExpr 

func (*NullCheck) IExpr()

type NullVal 

type NullVal struct{}

NullVal represents a NULL value.

func (*NullVal) Format 

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

func (*NullVal) IExpr 

func (*NullVal) IExpr()

func (*NullVal) IValExpr 

func (*NullVal) IValExpr()

type NumVal 

type NumVal []byte

NumVal represents a number.

func (NumVal) Format 

func (node NumVal) Format(buf *TrackedBuffer)

func (NumVal) IExpr 

func (NumVal) IExpr()

func (NumVal) IValExpr 

func (NumVal) IValExpr()

type OnDup 

type OnDup UpdateExprs

OnDup represents an ON DUPLICATE KEY clause.

func (OnDup) Format 

func (node OnDup) Format(buf *TrackedBuffer)

type OrExpr 

type OrExpr struct {
	Left, Right BoolExpr
}

OrExpr represents an OR expression.

func (*OrExpr) Format 

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

func (*OrExpr) IBoolExpr 

func (*OrExpr) IBoolExpr()

func (*OrExpr) IExpr 

func (*OrExpr) IExpr()

type Order 

type Order struct {
	Expr      ValExpr
	Direction string
}

Order represents an ordering expression.

func (*Order) Format 

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

type OrderBy 

type OrderBy []*Order

OrderBy represents an ORDER By clause.

func (OrderBy) Format 

func (node OrderBy) Format(buf *TrackedBuffer)

type ParenBoolExpr 

type ParenBoolExpr struct {
	Expr BoolExpr
}

ParenBoolExpr represents a parenthesized boolean expression.

func (*ParenBoolExpr) Format 

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

func (*ParenBoolExpr) IBoolExpr 

func (*ParenBoolExpr) IBoolExpr()

func (*ParenBoolExpr) IExpr 

func (*ParenBoolExpr) IExpr()

type ParenTableExpr 

type ParenTableExpr struct {
	Expr TableExpr
}

ParenTableExpr represents a parenthesized TableExpr.

func (*ParenTableExpr) Format 

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

func (*ParenTableExpr) ITableExpr 

func (*ParenTableExpr) ITableExpr()

type ParsedQuery 

type ParsedQuery struct {
	Query         string
	BindLocations []BindLocation
}

func GenerateDeleteOuterQuery 

func GenerateDeleteOuterQuery(del *Delete, pkIndex *schema.Index) *ParsedQuery

func GenerateDeleteSubquery 

func GenerateDeleteSubquery(del *Delete, tableInfo *schema.Table) *ParsedQuery

func GenerateEqualOuterQuery 

func GenerateEqualOuterQuery(sel *Select, tableInfo *schema.Table) *ParsedQuery

func GenerateFieldQuery 

func GenerateFieldQuery(statement Statement) *ParsedQuery

func GenerateFullQuery 

func GenerateFullQuery(statement Statement) *ParsedQuery

----------------------------------------------- Query Generation

func GenerateInOuterQuery 

func GenerateInOuterQuery(sel *Select, tableInfo *schema.Table) *ParsedQuery

func GenerateInsertOuterQuery 

func GenerateInsertOuterQuery(ins *Insert) *ParsedQuery

func GenerateSelectLimitQuery 

func GenerateSelectLimitQuery(selStmt SelectStatement) *ParsedQuery

func GenerateSelectSubquery 

func GenerateSelectSubquery(sel *Select, tableInfo *schema.Table, index string) *ParsedQuery

func GenerateSubquery 

func GenerateSubquery(columns []string, table *AliasedTableExpr, where *Where, order OrderBy, limit *Limit, for_update bool) *ParsedQuery

func GenerateUpdateOuterQuery 

func GenerateUpdateOuterQuery(upd *Update, pkIndex *schema.Index) *ParsedQuery

func GenerateUpdateSubquery 

func GenerateUpdateSubquery(upd *Update, tableInfo *schema.Table) *ParsedQuery

func (*ParsedQuery) GenerateQuery 

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

func (*ParsedQuery) MarshalJSON 

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

type ParserError 

type ParserError struct {
	Message string
}

ParserError: To be deprecated. TODO(sougou): deprecate.

func NewParserError 

func NewParserError(format string, args ...interface{}) ParserError

func (ParserError) Error 

func (err ParserError) Error() string

type PlanType 

type PlanType int
const (
	// PLAN_PASS_SELECT is pass through select statements. This is the
	// default plan for select statements.
	PLAN_PASS_SELECT PlanType = iota
	// PLAN_PASS_DML is pass through update & delete statements. This is
	// the default plan for update and delete statements.
	PLAN_PASS_DML
	// PLAN_PK_EQUAL is select statement which has an equality where clause
	// on primary key
	PLAN_PK_EQUAL
	// PLAN_PK_IN is select statement with a single IN clause on primary key
	PLAN_PK_IN
	// PLAN_SELECT_SUBQUERY is select statement with a subselect statement
	PLAN_SELECT_SUBQUERY
	// PLAN_DML_PK is an update or delete with an equality where clause(s)
	// on primary key(s)
	PLAN_DML_PK
	// PLAN_DML_SUBQUERY is an update or delete with a subselect statement
	PLAN_DML_SUBQUERY
	// PLAN_INSERT_PK is insert statement where the PK value is
	// supplied with the query
	PLAN_INSERT_PK
	// PLAN_INSERT_SUBQUERY is same as PLAN_DML_SUBQUERY but for inserts
	PLAN_INSERT_SUBQUERY
	// PLAN_SET is for SET statements
	PLAN_SET
	// PLAN_DDL is for DDL statements
	PLAN_DDL
	NumPlans
)

func PlanByName 

func PlanByName(s string) (pt PlanType, ok bool)

func (PlanType) IsSelect 

func (pt PlanType) IsSelect() bool

func (PlanType) MarshalJSON 

func (pt PlanType) MarshalJSON() ([]byte, error)

func (PlanType) String 

func (pt PlanType) String() string

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)

func (*RangeCond) IBoolExpr 

func (*RangeCond) IBoolExpr()

func (*RangeCond) IExpr 

func (*RangeCond) IExpr()

type ReasonType 

type ReasonType int
const (
	REASON_DEFAULT ReasonType = iota
	REASON_SELECT
	REASON_TABLE
	REASON_NOCACHE
	REASON_SELECT_LIST
	REASON_LOCK
	REASON_WHERE
	REASON_ORDER
	REASON_PKINDEX
	REASON_NOINDEX_MATCH
	REASON_TABLE_NOINDEX
	REASON_PK_CHANGE
	REASON_COMPOSITE_PK
	REASON_HAS_HINTS
	REASON_UPSERT
)

func (ReasonType) MarshalJSON 

func (rt ReasonType) MarshalJSON() ([]byte, error)

func (ReasonType) String 

func (rt ReasonType) String() string

type RoutingPlan 

type RoutingPlan struct {
	// contains filtered or unexported fields
}

type SQLNode 

type SQLNode interface {
	Format(buf *TrackedBuffer)
}

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

type Select 

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

Select represents a SELECT statement.

func (*Select) Format 

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

func (*Select) IInsertRows 

func (*Select) IInsertRows()

func (*Select) ISelectStatement 

func (*Select) ISelectStatement()

func (*Select) IStatement 

func (*Select) IStatement()

type SelectExpr 

type SelectExpr interface {
	ISelectExpr()
	SQLNode
}

SelectExpr represents a SELECT expression.

type SelectExprs 

type SelectExprs []SelectExpr

SelectExprs represents SELECT expressions.

func (SelectExprs) Format 

func (node SelectExprs) Format(buf *TrackedBuffer)

type SelectStatement 

type SelectStatement interface {
	ISelectStatement()
	IStatement()
	IInsertRows()
	SQLNode
}

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)

func (*Set) IStatement 

func (*Set) IStatement()

type SimpleTableExpr 

type SimpleTableExpr interface {
	ISimpleTableExpr()
	SQLNode
}

SimpleTableExpr represents a simple table expression.

type StarExpr 

type StarExpr struct {
	TableName []byte
}

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

func (*StarExpr) Format 

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

func (*StarExpr) ISelectExpr 

func (*StarExpr) ISelectExpr()

type Statement 

type Statement interface {
	IStatement()
	SQLNode
}

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)

func (StrVal) IExpr 

func (StrVal) IExpr()

func (StrVal) IValExpr 

func (StrVal) IValExpr()

type StreamExecPlan 

type StreamExecPlan struct {
	FullQuery *ParsedQuery
}

func StreamExecParse 

func StreamExecParse(sql string) (plan *StreamExecPlan, err error)

type Subquery 

type Subquery struct {
	Select SelectStatement
}

Subquery represents a subquery.

func (*Subquery) Format 

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

func (*Subquery) IExpr 

func (*Subquery) IExpr()

func (*Subquery) ISimpleTableExpr 

func (*Subquery) ISimpleTableExpr()

func (*Subquery) ITuple 

func (*Subquery) ITuple()

func (*Subquery) IValExpr 

func (*Subquery) IValExpr()

type TableExpr 

type TableExpr interface {
	ITableExpr()
	SQLNode
}

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)

type TableGetter 

type TableGetter func(tableName string) (*schema.Table, bool)

type TableName 

type TableName struct {
	Name, Qualifier []byte
}

TableName represents a table name.

func (*TableName) Format 

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

func (*TableName) ISimpleTableExpr 

func (*TableName) ISimpleTableExpr()

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) ConsumeNext 

func (tkn *Tokenizer) ConsumeNext(buffer *bytes.Buffer)

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

func (*TrackedBuffer) Fprintf 

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

Fprintf mimics fmt.Fprintf, 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.

func (*TrackedBuffer) ParsedQuery 

func (buf *TrackedBuffer) ParsedQuery() *ParsedQuery

func (*TrackedBuffer) WriteArg 

func (buf *TrackedBuffer) WriteArg(arg string)

WriteArg writes a value argument into the buffer. arg should not contain the ':' prefix. It also adds tracking info for future substitutions.

type Tuple 

type Tuple interface {
	ITuple()
	ValExpr
}

Tuple represents a tuple. It can be ValTuple, Subquery.

type UnaryExpr 

type UnaryExpr struct {
	Operator byte
	Expr     Expr
}

UnaryExpr represents a unary value expression.

func (*UnaryExpr) Format 

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

func (*UnaryExpr) IExpr 

func (*UnaryExpr) IExpr()

func (*UnaryExpr) IValExpr 

func (*UnaryExpr) IValExpr()

type Union 

type Union struct {
	Type        string
	Left, Right SelectStatement
}

Union represents a UNION statement.

func (*Union) Format 

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

func (*Union) IInsertRows 

func (*Union) IInsertRows()

func (*Union) ISelectStatement 

func (*Union) ISelectStatement()

func (*Union) IStatement 

func (*Union) IStatement()

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)

func (*Update) IStatement 

func (*Update) IStatement()

type UpdateExpr 

type UpdateExpr struct {
	Name *ColName
	Expr ValExpr
}

UpdateExpr represents an update expression.

func (*UpdateExpr) Format 

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

type UpdateExprs 

type UpdateExprs []*UpdateExpr

UpdateExprs represents a list of update expressions.

func (UpdateExprs) Format 

func (node UpdateExprs) Format(buf *TrackedBuffer)

type ValArg 

type ValArg []byte

ValArg represents a named bind var argument.

func (ValArg) Format 

func (node ValArg) Format(buf *TrackedBuffer)

func (ValArg) IExpr 

func (ValArg) IExpr()

func (ValArg) IValExpr 

func (ValArg) IValExpr()

type ValExpr 

type ValExpr interface {
	IValExpr()
	Expr
}

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)

type ValTuple 

type ValTuple ValExprs

ValTuple represents a tuple of actual values.

func (ValTuple) Format 

func (node ValTuple) Format(buf *TrackedBuffer)

func (ValTuple) IExpr 

func (ValTuple) IExpr()

func (ValTuple) ITuple 

func (ValTuple) ITuple()

func (ValTuple) IValExpr 

func (ValTuple) IValExpr()

type Values 

type Values []Tuple

Values represents a VALUES clause.

func (Values) Format 

func (node Values) Format(buf *TrackedBuffer)

func (Values) IInsertRows 

func (Values) IInsertRows()

type When 

type When struct {
	Cond BoolExpr
	Val  ValExpr
}

When represents a WHEN sub-expression.

func (*When) Format 

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

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)

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