sqlparser

package
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 Go to latest Published: Apr 25, 2017 License: BSD-3-Clause Imports: 11 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 (
	SQLCacheStr   = "sql_cache "
	SQLNoCacheStr = "sql_no_cache "
)

Select.Cache

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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 (
	ShowDatabasesStr     = "show databases"
	ShowKeyspacesStr     = "show vitess_keyspaces"
	ShowShardsStr        = "show vitess_shards"
	ShowTablesStr        = "show tables"
	ShowVSchemaTablesStr = "show vschema_tables"
	ShowUnsupportedStr   = "show unsupported"
)

The frollowing constants represent SHOW statements.

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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"
	JSONExtractOp        = "->"
	JSONUnquoteExtractOp = "->>"
)

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 (
	StrVal = ValType(iota)
	IntVal
	FloatVal
	HexNum
	HexVal
	ValArg
)

These are the possible Valtype values. HexNum represents a 0x... value. It cannot be treated as a simple value because it can be interpreted differently depending on the context.

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

BinaryExpr.Operator

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const (
	UPlusStr  = "+"
	UMinusStr = "-"
	TildaStr  = "~"
	BangStr   = "!"
	BinaryStr = "binary "
)

UnaryExpr.Operator

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const (
	BooleanModeStr                           = " in boolean mode"
	NaturalLanguageModeStr                   = " in natural language mode"
	NaturalLanguageModeWithQueryExpansionStr = " in natural language mode with query expansion"
	QueryExpansionStr                        = " with query expansion"
)

MatchExpr.Option

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

Order.Direction

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const AGAINST = 57474
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const ALL = 57361
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const ALTER = 57432
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const ANALYZE = 57435
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const AND = 57405
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const AS = 57363
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const ASC = 57365
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const BETWEEN = 57407
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const BINARY = 57427
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const BOOLEAN = 57475
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const BY = 57357
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const CASE = 57408
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const CAST = 57470
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const CHARACTER = 57458
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const COLLATE = 57426
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const COMMENT = 57400
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const CONVERT = 57469
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const CREATE = 57431
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const CROSS = 57387
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const CURRENT_DATE = 57461
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const CURRENT_TIME = 57462
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const CURRENT_TIMESTAMP = 57459
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const (
	CharacterSetStr = " character set"
)

this string is "character set" and this comment is required

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const DATABASE = 57460
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const DATABASES = 57452
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const DATE = 57447
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const DEFAULT = 57370
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const DELETE = 57351
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const DESC = 57366
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const DESCRIBE = 57445
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const DISTINCT = 57362
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const DIV = 57423
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const DROP = 57433
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const DUPLICATE = 57368
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const ELSE = 57411
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const END = 57412
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const ESCAPE = 57448
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const EXISTS = 57364
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const EXPANSION = 57479
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const EXPLAIN = 57446
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const FALSE = 57403
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const FLOAT = 57396
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const FOR = 57360
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const FORCE = 57390
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const FROM = 57352
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const GE = 57414
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const GROUP = 57354
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const GROUP_CONCAT = 57471
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const HAVING = 57355
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const HEX = 57393
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const HEXNUM = 57397
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const ID = 57392
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const IF = 57441
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const IGNORE = 57440
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const IN = 57420
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const INDEX = 57437
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const INNER = 57385
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const INSERT = 57349
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const INTEGER = 57457
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const INTEGRAL = 57395
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const INTERVAL = 57428
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const INTO = 57367
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const IS = 57417
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const JOIN = 57381
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const JSON_EXTRACT_OP = 57429
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const JSON_UNQUOTE_EXTRACT_OP = 57430
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const KEY = 57369
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const LANGUAGE = 57476
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const LAST_INSERT_ID = 57374
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const LE = 57413
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const LEFT = 57383
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const LEX_ERROR = 57346
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const LIKE = 57418
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const LIMIT = 57358
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const LIST_ARG = 57399
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const LOCALTIME = 57463
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const LOCALTIMESTAMP = 57464
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const LOCK = 57372
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const MATCH = 57473
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const MOD = 57424
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const MODE = 57378
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const NATURAL = 57388
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const NE = 57415
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const NEXT = 57375
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const NOT = 57406
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const NULL = 57401
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const NULL_SAFE_EQUAL = 57416
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const OFFSET = 57359
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const ON = 57391
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const OPTIMIZE = 57450
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const OR = 57404
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const ORDER = 57356
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const OUTER = 57386
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const QUERY = 57478
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const REGEXP = 57419
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const RENAME = 57434
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const REPAIR = 57449
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const REPLACE = 57468
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const RIGHT = 57384
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const SELECT = 57348
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const SEPARATOR = 57472
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const SET = 57371
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const SHARE = 57377
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const SHIFT_LEFT = 57421
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const SHIFT_RIGHT = 57422
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const SHOW = 57444
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const SQL_CACHE = 57380
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const SQL_NO_CACHE = 57379
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const STRAIGHT_JOIN = 57382
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const STRING = 57394
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const TABLE = 57436
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const TABLES = 57453
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const THEN = 57410
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const TO = 57439
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const TRUE = 57402
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const TRUNCATE = 57451
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const UNARY = 57425
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const UNION = 57347
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const UNIQUE = 57442
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const UNUSED = 57480
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const UPDATE = 57350
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const USE = 57389
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const USING = 57443
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const UTC_DATE = 57465
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const UTC_TIME = 57466
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const UTC_TIMESTAMP = 57467
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const VALUE = 57376
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const VALUES = 57373
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const VALUE_ARG = 57398
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const VIEW = 57438
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const VITESS_KEYSPACES = 57454
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const VITESS_SHARDS = 57455
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const VSCHEMA_TABLES = 57456
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const WHEN = 57409
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const WHERE = 57353
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const WITH = 57477

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 Append 

func Append(buf *bytes.Buffer, node SQLNode)

Append appends the SQLNode to the buffer.

func AsInterface 

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

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

func Backtick 

func Backtick(in string) string

Backtick produces a backticked literal given an input string.

func EncodeValue 

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

EncodeValue encodes one bind variable value into the query.

func ExtractSetNums 

func ExtractSetNums(sql string) (map[string]int64, error)

ExtractSetNums returns a map of key-num pairs if the query is a SET statement. Otherwise, it returns an error.

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 FormatImpossibleQuery 

func FormatImpossibleQuery(buf *TrackedBuffer, node SQLNode)

FormatImpossibleQuery creates an impossible query in a TrackedBuffer. An impossible query is a modified version of a query where all selects have where clauses that are impossible for mysql to resolve. This is used in the vtgate and vttablet:

- In the vtgate it's used for joins: if the first query returns no result, then vtgate uses the impossible query just to fetch field info from vttablet - In the vttablet, it's just an optimization: the field info is fetched once form MySQL, cached and reused for subsequent queries

func GetBindvars 

func GetBindvars(stmt Statement) map[string]struct{}

GetBindvars returns a map of the bind vars referenced in the statement. TODO(sougou); This function gets called again from vtgate/planbuilder. Ideally, this should be done only once.

func HasPrefix 

func HasPrefix(sql string, values ...string) bool

HasPrefix returns true if the query has one of the specified statement prefixes. For example, you can find out if a query is a DML with HasPrefix(sql, "insert", "update", "delete").

func IsColName 

func IsColName(node Expr) bool

IsColName returns true if the Expr is a *ColName.

func IsDML 

func IsDML(sql string) bool

IsDML returns true if the query is an INSERT, UPDATE or DELETE statement.

func IsNull 

func IsNull(node Expr) bool

IsNull returns true if the Expr is SQL NULL

func IsSimpleTuple 

func IsSimpleTuple(node Expr) bool

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

func IsStatement 

func IsStatement(sql, statement string) bool

IsStatement returns true if the sql matches a single-word statement like begin, commit or rollback.

func IsValue 

func IsValue(node Expr) bool

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

func Normalize 

func Normalize(stmt Statement, bindVars map[string]interface{}, prefix string)

Normalize changes the statement to use bind values, and updates the bind vars to those values. The supplied prefix is used to generate the bind var names. The function ensures that there are no collisions with existing bind vars.

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 Expr
}

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 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  Expr
	Whens []*When
	Else  Expr
}

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 struct {
	// contains filtered or unexported fields
}

ColIdent is a case insensitive SQL identifier. It will be escaped with backquotes if necessary.

func NewColIdent 

func NewColIdent(str string) ColIdent

NewColIdent makes a new ColIdent.

func (ColIdent) CompliantName 

func (node ColIdent) CompliantName() string

CompliantName returns a compliant id name that can be used for a bind var.

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) IsEmpty 

func (node ColIdent) IsEmpty() bool

IsEmpty returns true if the name is empty.

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) MarshalJSON 

func (node ColIdent) MarshalJSON() ([]byte, error)

MarshalJSON marshals into JSON.

func (ColIdent) String 

func (node ColIdent) String() string

String returns the unescaped column name. It must not be used for SQL generation. Use sqlparser.String instead. The Stringer conformance is for usage in templates.

func (*ColIdent) UnmarshalJSON 

func (node *ColIdent) UnmarshalJSON(b []byte) error

UnmarshalJSON unmarshals from JSON.

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) Equal 

func (node *ColName) Equal(c *ColName) bool

Equal returns true if the column names match.

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 {
	Expr
	// contains filtered or unexported methods
}

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

type CollateExpr 

type CollateExpr struct {
	Expr    Expr
	Charset string
}

CollateExpr represents dynamic collate operator.

func (*CollateExpr) Format 

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

Format formats the node.

func (*CollateExpr) WalkSubtree 

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

WalkSubtree walks the nodes of the subtree.

type Columns 

type Columns []ColIdent

Columns represents an insert column list.

func (Columns) FindColumn 

func (node Columns) FindColumn(col ColIdent) int

FindColumn finds a column in the column list, returning the index if it exists or -1 otherwise

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 Expr
	Escape      Expr
}

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 ConvertExpr 

type ConvertExpr struct {
	Expr Expr
	Type *ConvertType
}

ConvertExpr represents a call to CONVERT(expr, type) CONVERT(expr USING transcoding_name) it not supported

func (*ConvertExpr) Format 

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

Format formats the node.

func (*ConvertExpr) WalkSubtree 

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

WalkSubtree walks the nodes of the subtree.

type ConvertType 

type ConvertType struct {
	Type     string
	Length   *SQLVal
	Scale    *SQLVal
	Operator string
	Charset  string
}

ConvertType represents the type in call to CONVERT(expr, type)

func (*ConvertType) Format 

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

Format formats the node.

func (*ConvertType) WalkSubtree 

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

WalkSubtree walks the nodes of the subtree.

type DDL 

type DDL struct {
	Action   string
	Table    *TableName
	NewName  *TableName
	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 Exprs 

type Exprs []Expr

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

func (Exprs) Format 

func (node Exprs) Format(buf *TrackedBuffer)

Format formats the node.

func (Exprs) WalkSubtree 

func (node Exprs) WalkSubtree(visit Visit) error

WalkSubtree walks the nodes of the subtree.

type FuncExpr 

type FuncExpr struct {
	Qualifier TableIdent
	Name      ColIdent
	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 []Expr

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 GroupConcatExpr 

type GroupConcatExpr struct {
	Distinct  string
	Exprs     SelectExprs
	OrderBy   OrderBy
	Separator string
}

GroupConcatExpr represents a call to GROUP_CONCAT

func (*GroupConcatExpr) Format 

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

Format formats the node

func (*GroupConcatExpr) WalkSubtree 

func (node *GroupConcatExpr) 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        Expr
}

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 Expr
}

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 MatchExpr 

type MatchExpr struct {
	Columns SelectExprs
	Expr    Expr
	Option  string
}

MatchExpr represents a call to the MATCH function

func (*MatchExpr) Format 

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

Format formats the node

func (*MatchExpr) WalkSubtree 

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

WalkSubtree walks the nodes of the subtree.

type Nextval 

type Nextval struct {
	Expr Expr
}

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 Expr
}

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 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 Expr
}

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      Expr
	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 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 ParenExpr 

type ParenExpr struct {
	Expr Expr
}

ParenExpr represents a parenthesized boolean expression.

func (*ParenExpr) Format 

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

Format formats the node.

func (*ParenExpr) WalkSubtree 

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

WalkSubtree walks the nodes of the subtree.

type ParenSelect 

type ParenSelect struct {
	Select SelectStatement
}

ParenSelect is a parenthesized SELECT statement.

func (*ParenSelect) AddOrder 

func (node *ParenSelect) AddOrder(order *Order)

AddOrder adds an order by element

func (*ParenSelect) Format 

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

Format formats the node.

func (*ParenSelect) SetLimit 

func (node *ParenSelect) SetLimit(limit *Limit)

SetLimit sets the limit clause

func (*ParenSelect) WalkSubtree 

func (node *ParenSelect) 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 BuildParsedQuery 

func BuildParsedQuery(in string, vars ...interface{}) *ParsedQuery

BuildParsedQuery builds a ParsedQuery from the input.

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. Note that any queries longer that 512 bytes will be truncated.

type RangeCond 

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

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 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 SQLVal 

type SQLVal struct {
	Type ValType
	Val  []byte
}

SQLVal represents a single value.

func NewFloatVal 

func NewFloatVal(in []byte) *SQLVal

NewFloatVal builds a new FloatVal.

func NewHexNum 

func NewHexNum(in []byte) *SQLVal

NewHexNum builds a new HexNum.

func NewHexVal 

func NewHexVal(in []byte) *SQLVal

NewHexVal builds a new HexVal.

func NewIntVal 

func NewIntVal(in []byte) *SQLVal

NewIntVal builds a new IntVal.

func NewStrVal 

func NewStrVal(in []byte) *SQLVal

NewStrVal builds a new StrVal.

func NewValArg 

func NewValArg(in []byte) *SQLVal

NewValArg builds a new ValArg.

func (*SQLVal) Format 

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

Format formats the node.

func (*SQLVal) HexDecode 

func (node *SQLVal) HexDecode() ([]byte, error)

HexDecode decodes the hexval into bytes.

func (*SQLVal) WalkSubtree 

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

WalkSubtree walks the nodes of the subtree.

type Select 

type Select struct {
	Cache       string
	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 Expr)

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) AddOrder 

func (node *Select) AddOrder(order *Order)

AddOrder adds an order by element

func (*Select) AddWhere 

func (node *Select) AddWhere(expr Expr)

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) SetLimit 

func (node *Select) SetLimit(limit *Limit)

SetLimit sets the limit clause

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 {
	AddOrder(*Order)
	SetLimit(*Limit)
	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 Show 

type Show struct {
	Type string
}

Show represents a show statement.

func (*Show) Format 

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

Format formats the node.

func (*Show) WalkSubtree 

func (node *Show) 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 *TableName
}

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 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 struct {
	// contains filtered or unexported fields
}

TableIdent is a case sensitive SQL identifier. It will be escaped with backquotes if necessary.

func GetTableName 

func GetTableName(node SimpleTableExpr) TableIdent

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

func NewTableIdent 

func NewTableIdent(str string) TableIdent

NewTableIdent creates a new TableIdent.

func (TableIdent) CompliantName 

func (node TableIdent) CompliantName() string

CompliantName returns a compliant id name that can be used for a bind var.

func (TableIdent) Format 

func (node TableIdent) Format(buf *TrackedBuffer)

Format formats the node.

func (TableIdent) IsEmpty 

func (node TableIdent) IsEmpty() bool

IsEmpty returns true if TabIdent is empty.

func (TableIdent) MarshalJSON 

func (node TableIdent) MarshalJSON() ([]byte, error)

MarshalJSON marshals into JSON.

func (TableIdent) String 

func (node TableIdent) String() string

String returns the unescaped table name. It must not be used for SQL generation. Use sqlparser.String instead. The Stringer conformance is for usage in templates.

func (*TableIdent) UnmarshalJSON 

func (node *TableIdent) UnmarshalJSON(b []byte) error

UnmarshalJSON unmarshals from JSON.

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) Equal 

func (node *TableName) Equal(t *TableName) bool

Equal returns true if the table names match.

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) ToViewName 

func (node *TableName) ToViewName() *TableName

ToViewName returns a TableName acceptable for use as a VIEW. VIEW names are always lowercase, so ToViewName lowercasese the name. Databases are case-sensitive so Qualifier is left untouched.

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.

func (*TrackedBuffer) WriteNode 

func (buf *TrackedBuffer) WriteNode(node SQLNode) *TrackedBuffer

WriteNode function, initiates the writing of a single SQLNode tree by passing through to Myprintf with a default format string

type TupleEqualityList 

type TupleEqualityList struct {
	Columns []ColIdent
	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 string
	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
	OrderBy     OrderBy
	Limit       *Limit
	Lock        string
}

Union represents a UNION statement.

func (*Union) AddOrder 

func (node *Union) AddOrder(order *Order)

AddOrder adds an order by element

func (*Union) Format 

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

Format formats the node.

func (*Union) SetLimit 

func (node *Union) SetLimit(limit *Limit)

SetLimit sets the limit clause

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    *AliasedTableExpr
	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 *ColName
	Expr Expr
}

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 ValTuple 

type ValTuple Exprs

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 ValType 

type ValType int

ValType specifies the type for SQLVal.

type Values 

type Values []ValTuple

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 ValuesFuncExpr 

type ValuesFuncExpr struct {
	Name     ColIdent
	Resolved Expr
}

ValuesFuncExpr represents a function call.

func (*ValuesFuncExpr) Format 

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

Format formats the node.

func (*ValuesFuncExpr) WalkSubtree 

func (node *ValuesFuncExpr) 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 Expr
	Val  Expr
}

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 Expr
}

Where represents a WHERE or HAVING clause.

func NewWhere 

func NewWhere(typ string, expr Expr) *Where

NewWhere creates a WHERE or HAVING clause out of a Expr. 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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