parser

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 Go to latest Published: May 13, 2021 License: Apache-2.0 Imports: 9 Imported by: 0

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Overview

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Index

Constants

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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_TABLE = "table"
	AST_VIEW  = "view"
)
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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 (
	//other keywords
	AST_UNSIGNED = "unsigned"
	AST_ZEROFILL = "zerofill"

	//datatypes
	AST_BIT       = "bit"
	AST_TINYINT   = "tinyint"
	AST_SMALLINT  = "smallint"
	AST_MEDIUMINT = "mediumint"
	AST_INT       = "int"
	AST_INTEGER   = "integer"
	AST_BIGINT    = "bigint"

	AST_REAL    = "real"
	AST_DOUBLE  = "double"
	AST_FLOAT   = "float"
	AST_DECIMAL = "decimal"
	AST_NUMERIC = "numeric"

	AST_CHAR    = "char"
	AST_VARCHAR = "varchar"
	AST_TEXT    = "text"

	AST_DATE      = "date"
	AST_TIME      = "time"
	AST_TIMESTAMP = "timestamp"
	AST_DATETIME  = "datetime"
	AST_YEAR      = "year"

	AST_PRIMARY_KEY = "primary key"

	AST_UNIQUE_KEY     = "unique key"
	AST_AUTO_INCREMENT = "auto_increment"
	AST_NOT_NULL       = "not null"
	AST_DEFAULT        = "default"
	AST_KEY            = "key"
)
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const ALL = 57359
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const ALTER = 57414
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const ANALYZE = 57417
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const AND = 57405
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const APPROXNUM = 57453
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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 AUTO_INCREMENT = 57451
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const BETWEEN = 57366
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const BIGINT = 57434
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const BIT = 57428
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const BOOL = 57452
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const BY = 57356
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const CASE = 57408
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const CHAR = 57448
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const COMMENT = 57382
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const CREATE = 57413
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const CROSS = 57399
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const DATE = 57442
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const DATETIME = 57445
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const DECIMAL = 57440
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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 DESCRIBE = 57426
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const DISTINCT = 57360
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const DOUBLE = 57436
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const DROP = 57415
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const DUPLICATE = 57372
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const ELSE = 57411
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const END = 57412
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const EOFCHAR = 0x100
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const EXCEPT = 57391
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const EXISTS = 57362
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const EXPLAIN = 57427
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const FLOAT = 57437
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const FOR = 57358
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const FORCE = 57402
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const FROM = 57351
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const GE = 57384
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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 = 57423
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const IGNORE = 57422
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const IN = 57363
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const INDEX = 57419
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const INNER = 57397
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const INSERT = 57348
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const INT = 57432
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const INTEGER = 57433
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const INTERSECT = 57392
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const INTNUM = 57454
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const INTO = 57371
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const IS = 57364
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const JOIN = 57393
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const KEY = 57373
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const LE = 57383
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const LEFT = 57395
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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 LIST_ARG = 57381
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const LOCK = 57376
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const MEDIUMINT = 57431
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const MINUS = 57390
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const NATURAL = 57400
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const NE = 57385
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const NOT = 57406
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const NULL = 57367
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const NULLX = 57450
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const NULL_SAFE_EQUAL = 57386
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const NUMBER = 57379
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const NUMERIC = 57441
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const ON = 57403
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const OR = 57404
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const ORDER = 57355
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const OUTER = 57398
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const PRIMARY = 57387
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const REAL = 57435
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const RENAME = 57416
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const RIGHT = 57396
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const SELECT = 57347
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const SET = 57375
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const SHOW = 57425
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const SMALLINT = 57430
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const STRAIGHT_JOIN = 57394
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const STRING = 57378
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const TABLE = 57418
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const TEXT = 57447
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const THEN = 57410
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const TIME = 57443
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const TIMESTAMP = 57444
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const TINYINT = 57429
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const TO = 57421
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const UNARY = 57407
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const UNION = 57389
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const UNIQUE = 57388
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const UNSIGNED = 57438
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const UPDATE = 57349
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const USE = 57401
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const USING = 57424
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const VALUES = 57370
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const VALUE_ARG = 57380
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const VARCHAR = 57449
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const VIEW = 57420
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const WHEN = 57409
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const WHERE = 57352
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const YEAR = 57446
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const ZEROFILL = 57439

Variables

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

func Extracte 

func Extracte(str []byte) string

Extracte sql statement from string

func FetchBindVar 

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

func Filter 

func Filter(str []byte) bool

func ForceEOF 

func ForceEOF(yylex interface{})

func GetColName 

func GetColName(node Expr) string

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

func GetQueryModificada 

func GetQueryModificada(queryOriginal string) string

GetQueryModificada calllback

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 any of 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 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 Is_BIG_DELETE 

func Is_BIG_DELETE(sql *Delete) bool

func Is_BIG_INSERT 

func Is_BIG_INSERT(sql *Insert) bool

func Is_ORDER_BY_RAND 

func Is_ORDER_BY_RAND(sql *Select) bool

func Is_SELECT_ALL 

func Is_SELECT_ALL(sql *Select) bool

func ParseDelete 

func ParseDelete(sql *Delete) bool

func ParseInsert 

func ParseInsert(sql *Insert) bool

func ParseSelect 

func ParseSelect(sql *Select) bool

func ParseUpdate 

func ParseUpdate(sql *Update) bool

func ReWriteSQL 

func ReWriteSQL(str []byte) []byte

ReWrite SQL test

func Return 

func Return(str []byte) bool

func Rewrite 

func Rewrite(node SQLNode, rewriter Rewriter)

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 BoolExpr 

type BoolExpr interface {
	IBoolExpr()
	Expr
}

BoolExpr represents a boolean expression.

type Callback 

type Callback func(get []byte) bool

Callback function from proxy to postgresql for rewrite request or sql.

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 ColTuple 

type ColTuple interface {
	IColTuple()
	ValExpr
}

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

type ColumnAtts 

type ColumnAtts []string

func (ColumnAtts) Format 

func (node ColumnAtts) Format(buf *TrackedBuffer)

type ColumnDefinition 

type ColumnDefinition struct {
	ColName    string
	ColType    string
	ColumnAtts ColumnAtts
}

func GetColumnByName 

func GetColumnByName(sqlNode SQLNode, name string) (*ColumnDefinition, error)

Get ColumnDefinition by name, sqlNode must be a CreateTable struct

func GetPrimaryKey 

func GetPrimaryKey(sqlNode SQLNode) (*ColumnDefinition, error)

Get the primary key ColumnDefinition of the table, sqlNode must be a CreateTable struct

func (ColumnDefinition) Format 

func (node ColumnDefinition) Format(buf *TrackedBuffer)

type ColumnDefinitions 

type ColumnDefinitions []*ColumnDefinition

func (ColumnDefinitions) Format 

func (node ColumnDefinitions) Format(buf *TrackedBuffer)

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 CreateTable 

type CreateTable struct {
	Name              []byte
	ColumnDefinitions ColumnDefinitions
}

func (*CreateTable) Format 

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

func (*CreateTable) IStatement 

func (node *CreateTable) IStatement()

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 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 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()

func (*FuncExpr) IsAggregate 

func (node *FuncExpr) IsAggregate() bool

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 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)

func (*Limit) Limits 

func (node *Limit) Limits() (offset, rowcount interface{}, err error)

Limits returns the values of the LIMIT clause as interfaces. The returned values can be nil for absent field, string for bind variable names, or int64 for an actual number. Otherwise, it's an error.

type ListArg 

type ListArg []byte

ListArg represents a named list argument.

func (ListArg) Format 

func (node ListArg) Format(buf *TrackedBuffer)

func (ListArg) IColTuple 

func (ListArg) IColTuple()

func (ListArg) IExpr 

func (ListArg) IExpr()

func (ListArg) IValExpr 

func (ListArg) IValExpr()

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 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)

func (*Other) IStatement 

func (*Other) IStatement()

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
	// contains filtered or unexported fields
}

func (*ParsedQuery) GenerateQuery 

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

func (*ParsedQuery) MarshalJSON 

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

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 Rewriter 

type Rewriter func([]byte) []byte

type RowTuple 

type RowTuple interface {
	IRowTuple()
	ValExpr
}

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

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 Subquery 

type Subquery struct {
	Select SelectStatement
}

Subquery represents a subquery.

func (*Subquery) Format 

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

func (*Subquery) IColTuple 

func (*Subquery) IColTuple()

func (*Subquery) IExpr 

func (*Subquery) IExpr()

func (*Subquery) IRowTuple 

func (*Subquery) IRowTuple()

func (*Subquery) ISimpleTableExpr 

func (*Subquery) ISimpleTableExpr()

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 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) HasBindVars 

func (buf *TrackedBuffer) HasBindVars() bool

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

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 TupleEqualityList 

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

func (*TupleEqualityList) Encode 

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

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) IColTuple 

func (ValTuple) IColTuple()

func (ValTuple) IExpr 

func (ValTuple) IExpr()

func (ValTuple) IRowTuple 

func (ValTuple) IRowTuple()

func (ValTuple) IValExpr 

func (ValTuple) IValExpr()

type Values 

type Values []RowTuple

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)

Source Files

View all Source files

Directories

Path Synopsis
dependency
bson
Package bson implements encoding and decoding of BSON objects.
 Package bson implements encoding and decoding of BSON objects.
bytes2
Package bytes2 provides alternate implementations of functionality similar to go's bytes package.
 Package bytes2 provides alternate implementations of functionality similar to go's bytes package.
hack
Package hack gives you some efficient functionality at the cost of breaking some Go rules.
 Package hack gives you some efficient functionality at the cost of breaking some Go rules.
sqltypes
Package sqltypes implements interfaces and types that represent SQL values.
 Package sqltypes implements interfaces and types that represent SQL values.

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