sqlparser

package module
Version: v0.0.0-...-1203878 Latest Latest
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Published: Jun 6, 2018 License: Apache-2.0 Imports: 13 Imported by: 128

README

sqlparser Build Status Coverage Report card GoDoc

Go package for parsing MySQL SQL queries.

Notice

The backbone of this repo is extracted from vitessio/vitess.

Inside vitessio/vitess there is a very nicely written sql parser. However as it's not a self-contained application, I created this one. It applies the same LICENSE as vitessio/vitess.

Usage

import (
    "github.com/xwb1989/sqlparser"
)

Then use:

sql := "SELECT * FROM table WHERE a = 'abc'"
stmt, err := sqlparser.Parse(sql)
if err != nil {
	// Do something with the err
}

// Otherwise do something with stmt
switch stmt := stmt.(type) {
case *sqlparser.Select:
	_ = stmt
case *sqlparser.Insert:
}

Alternative to read many queries from a io.Reader:

r := strings.NewReader("INSERT INTO table1 VALUES (1, 'a'); INSERT INTO table2 VALUES (3, 4);")

tokens := sqlparser.NewTokenizer(r)
for {
	stmt, err := sqlparser.ParseNext(tokens)
	if err == io.EOF {
		break
	}
	// Do something with stmt or err.
}

See parse_test.go for more examples, or read the godoc.

Porting Instructions

You only need the below if you plan to try and keep this library up to date with vitessio/vitess.

Keeping up to date
shopt -s nullglob
VITESS=${GOPATH?}/src/vitess.io/vitess/go/
XWB1989=${GOPATH?}/src/github.com/xwb1989/sqlparser/

# Create patches for everything that changed
LASTIMPORT=1b7879cb91f1dfe1a2dfa06fea96e951e3a7aec5
for path in ${VITESS?}/{vt/sqlparser,sqltypes,bytes2,hack}; do
	cd ${path}
	git format-patch ${LASTIMPORT?} .
done;

# Apply patches to the dependencies
cd ${XWB1989?}
git am --directory dependency -p2 ${VITESS?}/{sqltypes,bytes2,hack}/*.patch

# Apply the main patches to the repo
cd ${XWB1989?}
git am -p4 ${VITESS?}/vt/sqlparser/*.patch

# If you encounter diff failures, manually fix them with
patch -p4 < .git/rebase-apply/patch
...
git add name_of_files
git am --continue

# Cleanup
rm ${VITESS?}/{sqltypes,bytes2,hack}/*.patch ${VITESS?}/*.patch

# and Finally update the LASTIMPORT in this README.
Fresh install

TODO: Change these instructions to use git to copy the files, that'll make later patching easier.

VITESS=${GOPATH?}/src/vitess.io/vitess/go/
XWB1989=${GOPATH?}/src/github.com/xwb1989/sqlparser/

cd ${XWB1989?}

# Copy all the code
cp -pr ${VITESS?}/vt/sqlparser/ .
cp -pr ${VITESS?}/sqltypes dependency
cp -pr ${VITESS?}/bytes2 dependency
cp -pr ${VITESS?}/hack dependency

# Delete some code we haven't ported
rm dependency/sqltypes/arithmetic.go dependency/sqltypes/arithmetic_test.go dependency/sqltypes/event_token.go dependency/sqltypes/event_token_test.go dependency/sqltypes/proto3.go dependency/sqltypes/proto3_test.go dependency/sqltypes/query_response.go dependency/sqltypes/result.go dependency/sqltypes/result_test.go

# Some automated fixes

# Fix imports
sed -i '.bak' 's_vitess.io/vitess/go/vt/proto/query_github.com/xwb1989/sqlparser/dependency/querypb_g' *.go dependency/sqltypes/*.go
sed -i '.bak' 's_vitess.io/vitess/go/_github.com/xwb1989/sqlparser/dependency/_g' *.go dependency/sqltypes/*.go

# Copy the proto, but basically drop everything we don't want
cp -pr ${VITESS?}/vt/proto/query dependency/querypb

sed -i '.bak' 's_.*Descriptor.*__g' dependency/querypb/*.go
sed -i '.bak' 's_.*ProtoMessage.*__g' dependency/querypb/*.go

sed -i '.bak' 's/proto.CompactTextString(m)/"TODO"/g' dependency/querypb/*.go
sed -i '.bak' 's/proto.EnumName/EnumName/g' dependency/querypb/*.go

sed -i '.bak' 's/proto.Equal/reflect.DeepEqual/g' dependency/sqltypes/*.go

# Remove the error library
sed -i '.bak' 's/vterrors.Errorf([^,]*, /fmt.Errorf(/g' *.go dependency/sqltypes/*.go
sed -i '.bak' 's/vterrors.New([^,]*, /errors.New(/g' *.go dependency/sqltypes/*.go
Testing
VITESS=${GOPATH?}/src/vitess.io/vitess/go/
XWB1989=${GOPATH?}/src/github.com/xwb1989/sqlparser/

cd ${XWB1989?}

# Test, fix and repeat
go test ./...

# Finally make some diffs (for later reference)
diff -u ${VITESS?}/sqltypes/        ${XWB1989?}/dependency/sqltypes/ > ${XWB1989?}/patches/sqltypes.patch
diff -u ${VITESS?}/bytes2/          ${XWB1989?}/dependency/bytes2/   > ${XWB1989?}/patches/bytes2.patch
diff -u ${VITESS?}/vt/proto/query/  ${XWB1989?}/dependency/querypb/  > ${XWB1989?}/patches/querypb.patch
diff -u ${VITESS?}/vt/sqlparser/    ${XWB1989?}/                     > ${XWB1989?}/patches/sqlparser.patch

Documentation

Index

Examples

Constants

View Source
const (
	StmtSelect = iota
	StmtStream
	StmtInsert
	StmtReplace
	StmtUpdate
	StmtDelete
	StmtDDL
	StmtBegin
	StmtCommit
	StmtRollback
	StmtSet
	StmtShow
	StmtUse
	StmtOther
	StmtUnknown
	StmtComment
)

These constants are used to identify the SQL statement type.

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

Select.Distinct

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

Select.Lock

View Source
const (
	SQLCacheStr   = "sql_cache "
	SQLNoCacheStr = "sql_no_cache "
)

Select.Cache

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

Union.Type

View Source
const (
	InsertStr  = "insert"
	ReplaceStr = "replace"
)

DDL strings.

View Source
const (
	SessionStr = "session"
	GlobalStr  = "global"
)

Set.Scope or Show.Scope

View Source
const (
	CreateStr        = "create"
	AlterStr         = "alter"
	DropStr          = "drop"
	RenameStr        = "rename"
	TruncateStr      = "truncate"
	CreateVindexStr  = "create vindex"
	AddColVindexStr  = "add vindex"
	DropColVindexStr = "drop vindex"

	// Vindex DDL param to specify the owner of a vindex
	VindexOwnerStr = "owner"
)

DDL strings.

View Source
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

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

Index hints.

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

Where.Type

View Source
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

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

RangeCond.Operator

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

IsExpr.Operator

View Source
const (
	StrVal = ValType(iota)
	IntVal
	FloatVal
	HexNum
	HexVal
	ValArg
	BitVal
)

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.

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

BinaryExpr.Operator

View Source
const (
	UPlusStr   = "+"
	UMinusStr  = "-"
	TildaStr   = "~"
	BangStr    = "!"
	BinaryStr  = "binary "
	UBinaryStr = "_binary "
)

UnaryExpr.Operator

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

MatchExpr.Option

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

Order.Direction

View Source
const (
	// DirectiveMultiShardAutocommit is the query comment directive to allow
	// single round trip autocommit with a multi-shard statement.
	DirectiveMultiShardAutocommit = "MULTI_SHARD_AUTOCOMMIT"
	// DirectiveSkipQueryPlanCache skips query plan cache when set.
	DirectiveSkipQueryPlanCache = "SKIP_QUERY_PLAN_CACHE"
	// DirectiveQueryTimeout sets a query timeout in vtgate. Only supported for SELECTS.
	DirectiveQueryTimeout = "QUERY_TIMEOUT_MS"
)
View Source
const ADD = 57442
View Source
const AGAINST = 57568
View Source
const ALL = 57362
View Source
const ALTER = 57438
View Source
const ANALYZE = 57441
View Source
const AND = 57410
View Source
const APPROXNUM = 57525
View Source
const AS = 57364
View Source
const ASC = 57366
View Source
const AUTO_INCREMENT = 57524
View Source
const BEGIN = 57477
View Source
const BETWEEN = 57412
View Source
const BIGINT = 57488
View Source
const BINARY = 57432
View Source
const BIT = 57482
View Source
const BIT_LITERAL = 57405
View Source
const BLOB = 57509
View Source
const BOOL = 57501
View Source
const BOOLEAN = 57569
View Source
const BY = 57358
View Source
const CASE = 57413
View Source
const CAST = 57562
View Source
const CHAR = 57499
View Source
const CHARACTER = 57502
View Source
const CHARSET = 57539
View Source
const COLLATE = 57431
View Source
const COLUMN = 57452
View Source
const COMMENT = 57403
View Source
const COMMENT_KEYWORD = 57404
View Source
const COMMIT = 57480
View Source
const COMMITTED = 57548
View Source
const CONSTRAINT = 57453
View Source
const CONVERT = 57561
View Source
const CREATE = 57437
View Source
const CROSS = 57389
View Source
const CURRENT_DATE = 57553
View Source
const CURRENT_TIME = 57554
View Source
const CURRENT_TIMESTAMP = 57551
View Source
const (
	CharacterSetStr = " character set"
)

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

View Source
const DATABASE = 57552
View Source
const DATABASES = 57529
View Source
const DATE = 57461
View Source
const DATETIME = 57497
View Source
const DECIMAL = 57493
View Source
const DEFAULT = 57371
View Source
const DELETE = 57352
View Source
const DESC = 57367
View Source
const DESCRIBE = 57459
View Source
const DISTINCT = 57363
View Source
const DIV = 57428
View Source
const DOUBLE = 57491
View Source
const DROP = 57439
View Source
const DUPLICATE = 57369
View Source
const ELSE = 57416
View Source
const END = 57417
View Source
const ENUM = 57514
View Source
const ESCAPE = 57462
View Source
const EXISTS = 57365
View Source
const EXPANSION = 57573
View Source
const EXPLAIN = 57460
View Source
const EXTENDED = 57535
View Source
const FALSE = 57408
View Source
const FLOAT = 57399
View Source
const FLOAT_TYPE = 57492
View Source
const FOR = 57361
View Source
const FORCE = 57392
View Source
const FOREIGN = 57456
View Source
const FROM = 57353
View Source
const FULL = 57536
View Source
const FULLTEXT = 57455
View Source
const GE = 57419
View Source
const GEOMETRY = 57515
View Source
const GEOMETRYCOLLECTION = 57519
View Source
const GLOBAL = 57540
View Source
const GROUP = 57355
View Source
const GROUP_CONCAT = 57565
View Source
const HAVING = 57356
View Source
const HEX = 57396
View Source
const HEXNUM = 57400
View Source
const ID = 57395
View Source
const IF = 57449
View Source
const IGNORE = 57448
View Source
const IN = 57425
View Source
const INDEX = 57445
View Source
const INNER = 57387
View Source
const INSERT = 57350
View Source
const INT = 57486
View Source
const INTEGER = 57487
View Source
const INTEGRAL = 57398
View Source
const INTERVAL = 57434
View Source
const INTNUM = 57489
View Source
const INTO = 57368
View Source
const IS = 57422
View Source
const ISOLATION = 57542
View Source
const JOIN = 57383
View Source
const JSON = 57513
View Source
const JSON_EXTRACT_OP = 57435
View Source
const JSON_UNQUOTE_EXTRACT_OP = 57436
View Source
const KEY = 57370
View Source
const KEYS = 57374
View Source
const KEY_BLOCK_SIZE = 57457
View Source
const LANGUAGE = 57570
View Source
const LAST_INSERT_ID = 57376
View Source
const LE = 57418
View Source
const LEFT = 57385
View Source
const LESS = 57469
View Source
const LEVEL = 57543
View Source
const LEX_ERROR = 57346
View Source
const LIKE = 57423
View Source
const LIMIT = 57359
View Source
const LINESTRING = 57517
View Source
const LIST_ARG = 57402
View Source
const LOCALTIME = 57555
View Source
const LOCALTIMESTAMP = 57556
View Source
const LOCK = 57373
View Source
const LONGBLOB = 57512
View Source
const LONGTEXT = 57508
View Source
const MATCH = 57567
View Source
const MAXVALUE = 57466
View Source
const MEDIUMBLOB = 57511
View Source
const MEDIUMINT = 57485
View Source
const MEDIUMTEXT = 57507
View Source
const MOD = 57429
View Source
const MODE = 57380
View Source
const MULTILINESTRING = 57521
View Source
const MULTIPOINT = 57520
View Source
const MULTIPOLYGON = 57522
View Source
const NAMES = 57538
View Source
const NATURAL = 57390
View Source
const NCHAR = 57504
View Source
const NE = 57420
View Source
const NEXT = 57377
View Source
const NOT = 57411
View Source
const NULL = 57406
View Source
const NULLX = 57523
View Source
const NULL_SAFE_EQUAL = 57421
View Source
const NUMERIC = 57494
View Source
const OFFSET = 57360
View Source
const ON = 57393
View Source
const ONLY = 57546
View Source
const OPTIMIZE = 57464
View Source
const OR = 57409
View Source
const ORDER = 57357
View Source
const OUTER = 57388
View Source
const PARTITION = 57467
View Source
const POINT = 57516
View Source
const POLYGON = 57518
View Source
const PRIMARY = 57451
View Source
const PROCEDURE = 57471
View Source
const PROCESSLIST = 57537
View Source
const QUERY = 57572
View Source
const READ = 57544
View Source
const REAL = 57490
View Source
const REGEXP = 57424
View Source
const RENAME = 57440
View Source
const REORGANIZE = 57468
View Source
const REPAIR = 57463
View Source
const REPEATABLE = 57547
View Source
const REPLACE = 57560
View Source
const RIGHT = 57386
View Source
const ROLLBACK = 57481
View Source
const (
	ReorganizeStr = "reorganize partition"
)

Partition strings

View Source
const SCHEMA = 57443
View Source
const SELECT = 57348
View Source
const SEPARATOR = 57566
View Source
const SERIALIZABLE = 57550
View Source
const SESSION = 57541
View Source
const SET = 57372
View Source
const SHARE = 57379
View Source
const SHIFT_LEFT = 57426
View Source
const SHIFT_RIGHT = 57427
View Source
const SHOW = 57458
View Source
const SIGNED = 57526
View Source
const SMALLINT = 57484
View Source
const SPATIAL = 57454
View Source
const SQL_CACHE = 57382
View Source
const SQL_NO_CACHE = 57381
View Source
const START = 57478
View Source
const STATUS = 57475
View Source
const STRAIGHT_JOIN = 57384
View Source
const STREAM = 57349
View Source
const STRING = 57397
View Source
const SUBSTR = 57563
View Source
const SUBSTRING = 57564
View Source
const TABLE = 57444
View Source
const TABLES = 57530
View Source
const TEXT = 57505
View Source
const THAN = 57470
View Source
const THEN = 57415
View Source
const TIME = 57495
View Source
const TIMESTAMP = 57496
View Source
const TINYBLOB = 57510
View Source
const TINYINT = 57483
View Source
const TINYTEXT = 57506
View Source
const TO = 57447
View Source
const TRANSACTION = 57479
View Source
const TRIGGER = 57472
View Source
const TRUE = 57407
View Source
const TRUNCATE = 57465
View Source
const UNARY = 57430
View Source
const UNCOMMITTED = 57549
View Source
const UNDERSCORE_BINARY = 57433
View Source
const UNION = 57347
View Source
const UNIQUE = 57450
View Source
const UNSIGNED = 57527
View Source
const UNUSED = 57574
View Source
const UPDATE = 57351
View Source
const USE = 57391
View Source
const USING = 57394
View Source
const UTC_DATE = 57557
View Source
const UTC_TIME = 57558
View Source
const UTC_TIMESTAMP = 57559
View Source
const VALUE = 57378
View Source
const VALUES = 57375
View Source
const VALUE_ARG = 57401
View Source
const VARBINARY = 57503
View Source
const VARCHAR = 57500
View Source
const VARIABLES = 57476
View Source
const VIEW = 57446
View Source
const VINDEX = 57473
View Source
const VINDEXES = 57474
View Source
const VITESS_KEYSPACES = 57531
View Source
const VITESS_SHARDS = 57532
View Source
const VITESS_TABLETS = 57533
View Source
const VSCHEMA_TABLES = 57534
View Source
const WHEN = 57414
View Source
const WHERE = 57354
View Source
const WITH = 57571
View Source
const WRITE = 57545
View Source
const YEAR = 57498
View Source
const ZEROFILL = 57528

Variables

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 Append

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

Append appends the SQLNode to the buffer.

func Backtick

func Backtick(in string) string

Backtick produces a backticked literal given an input string.

func EncodeValue

func EncodeValue(buf *bytes.Buffer, value *querypb.BindVariable)

EncodeValue encodes one bind variable value into the query.

func ExtractMysqlComment

func ExtractMysqlComment(sql string) (version string, innerSQL string)

ExtractMysqlComment extracts the version and SQL from a comment-only query such as /*!50708 sql here */

func ExtractSetValues

func ExtractSetValues(sql string) (keyValues map[SetKey]interface{}, scope string, err error)

ExtractSetValues returns a map of key-value pairs if the query is a SET statement. Values can be bool, int64 or string. Since set variable names are case insensitive, all keys are returned as lower case.

func FetchBindVar

func FetchBindVar(name string, bindVariables map[string]*querypb.BindVariable) (val *querypb.BindVariable, 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 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 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 KeywordString

func KeywordString(id int) string

KeywordString returns the string corresponding to the given keyword

func NewPlanValue

func NewPlanValue(node Expr) (sqltypes.PlanValue, error)

NewPlanValue builds a sqltypes.PlanValue from an Expr.

func Normalize

func Normalize(stmt Statement, bindVars map[string]*querypb.BindVariable, 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. Within Select constructs, bind vars are deduped. This allows us to identify vindex equality. Otherwise, every value is treated as distinct.

func Preview

func Preview(sql string) int

Preview analyzes the beginning of the query using a simpler and faster textual comparison to identify the statement type.

func RedactSQLQuery

func RedactSQLQuery(sql string) (string, error)

RedactSQLQuery returns a sql string with the params stripped out for display

func SkipQueryPlanCacheDirective

func SkipQueryPlanCacheDirective(stmt Statement) bool

SkipQueryPlanCacheDirective returns true if skip query plan cache directive is set to true in query.

func SplitStatement

func SplitStatement(blob string) (string, string, error)

SplitStatement returns the first sql statement up to either a ; or EOF and the remainder from the given buffer

func SplitStatementToPieces

func SplitStatementToPieces(blob string) (pieces []string, err error)

SplitStatementToPieces split raw sql statement that may have multi sql pieces to sql pieces returns the sql pieces blob contains; or error if sql cannot be parsed

func StmtType

func StmtType(stmtType int) string

StmtType returns the statement type as a string

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 StripLeadingComments

func StripLeadingComments(sql string) string

StripLeadingComments trims the SQL string and removes any leading comments

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 AliasedExpr

type AliasedExpr struct {
	Expr Expr
	As   ColIdent
}

AliasedExpr defines an aliased SELECT expression.

func (*AliasedExpr) Format

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

Format formats the node.

type AliasedTableExpr

type AliasedTableExpr struct {
	Expr       SimpleTableExpr
	Partitions Partitions
	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) RemoveHints

func (node *AliasedTableExpr) RemoveHints() *AliasedTableExpr

RemoveHints returns a new AliasedTableExpr with the hints removed.

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.

type Begin

type Begin struct{}

Begin represents a Begin statement.

func (*Begin) Format

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

Format formats the node.

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.

type BoolVal

type BoolVal bool

BoolVal is true or false.

func (BoolVal) Format

func (node BoolVal) Format(buf *TrackedBuffer)

Format formats the node.

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.

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.

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.

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.

type ColumnDefinition

type ColumnDefinition struct {
	Name ColIdent
	Type ColumnType
}

ColumnDefinition describes a column in a CREATE TABLE statement

func (*ColumnDefinition) Format

func (col *ColumnDefinition) Format(buf *TrackedBuffer)

Format formats the node.

type ColumnKeyOption

type ColumnKeyOption int

ColumnKeyOption indicates whether or not the given column is defined as an index element and contains the type of the option

type ColumnType

type ColumnType struct {
	// The base type string
	Type string

	// Generic field options.
	NotNull       BoolVal
	Autoincrement BoolVal
	Default       *SQLVal
	OnUpdate      *SQLVal
	Comment       *SQLVal

	// Numeric field options
	Length   *SQLVal
	Unsigned BoolVal
	Zerofill BoolVal
	Scale    *SQLVal

	// Text field options
	Charset string
	Collate string

	// Enum values
	EnumValues []string

	// Key specification
	KeyOpt ColumnKeyOption
}

ColumnType represents a sql type in a CREATE TABLE statement All optional fields are nil if not specified

func (*ColumnType) DescribeType

func (ct *ColumnType) DescribeType() string

DescribeType returns the abbreviated type information as required for describe table

func (*ColumnType) Format

func (ct *ColumnType) Format(buf *TrackedBuffer)

Format returns a canonical string representation of the type and all relevant options

func (*ColumnType) SQLType

func (ct *ColumnType) SQLType() querypb.Type

SQLType returns the sqltypes type code for the given column

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.

type CommentDirectives

type CommentDirectives map[string]interface{}

CommentDirectives is the parsed representation for execution directives conveyed in query comments

func ExtractCommentDirectives

func ExtractCommentDirectives(comments Comments) CommentDirectives

ExtractCommentDirectives parses the comment list for any execution directives of the form:

/*vt+ OPTION_ONE=1 OPTION_TWO OPTION_THREE=abcd */

It returns the map of the directive values or nil if there aren't any.

func (CommentDirectives) IsSet

func (d CommentDirectives) IsSet(key string) bool

IsSet checks the directive map for the named directive and returns true if the directive is set and has a true/false or 0/1 value

type Comments

type Comments [][]byte

Comments represents a list of comments.

func (Comments) Format

func (node Comments) Format(buf *TrackedBuffer)

Format formats the node.

type Commit

type Commit struct{}

Commit represents a Commit statement.

func (*Commit) Format

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

Format formats the node.

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.

type ConvertExpr

type ConvertExpr struct {
	Expr Expr
	Type *ConvertType
}

ConvertExpr represents a call to CONVERT(expr, type) or it's equivalent CAST(expr AS type). Both are rewritten to the former.

func (*ConvertExpr) Format

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

Format formats the node.

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.

type ConvertUsingExpr

type ConvertUsingExpr struct {
	Expr Expr
	Type string
}

ConvertUsingExpr represents a call to CONVERT(expr USING charset).

func (*ConvertUsingExpr) Format

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

Format formats the node.

type DBDDL

type DBDDL struct {
	Action   string
	DBName   string
	IfExists bool
	Collate  string
	Charset  string
}

DBDDL represents a CREATE, DROP database statement.

func (*DBDDL) Format

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

Format formats the node.

type DDL

type DDL struct {
	Action        string
	Table         TableName
	NewName       TableName
	IfExists      bool
	TableSpec     *TableSpec
	PartitionSpec *PartitionSpec
	VindexSpec    *VindexSpec
	VindexCols    []ColIdent
}

DDL represents a CREATE, ALTER, DROP, RENAME or TRUNCATE statement. Table is set for AlterStr, DropStr, RenameStr, TruncateStr NewName is set for AlterStr, CreateStr, RenameStr. VindexSpec is set for CreateVindexStr, DropVindexStr, AddColVindexStr, DropColVindexStr VindexCols is set for AddColVindexStr

func (*DDL) Format

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

Format formats the node.

type Default

type Default struct {
	ColName string
}

Default represents a DEFAULT expression.

func (*Default) Format

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

Format formats the node.

type Delete

type Delete struct {
	Comments   Comments
	Targets    TableNames
	TableExprs TableExprs
	Partitions Partitions
	Where      *Where
	OrderBy    OrderBy
	Limit      *Limit
}

Delete represents a DELETE statement. If you add fields here, consider adding them to calls to validateSubquerySamePlan.

func (*Delete) Format

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

Format formats the node.

type Encodable

type Encodable interface {
	EncodeSQL(buf *bytes.Buffer)
}

Encodable defines the interface for types that can be custom-encoded into SQL.

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.

type Expr

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

Expr represents an expression.

func ExprFromValue

func ExprFromValue(value sqltypes.Value) (Expr, error)

ExprFromValue converts the given Value into an Expr or returns an error.

func ReplaceExpr

func ReplaceExpr(root, from, to Expr) Expr

ReplaceExpr finds the from expression from root and replaces it with to. If from matches root, then to is returned.

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.

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.

type GroupBy

type GroupBy []Expr

GroupBy represents a GROUP BY clause.

func (GroupBy) Format

func (node GroupBy) Format(buf *TrackedBuffer)

Format formats the node.

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

type IndexColumn

type IndexColumn struct {
	Column ColIdent
	Length *SQLVal
}

IndexColumn describes a column in an index definition with optional length

type IndexDefinition

type IndexDefinition struct {
	Info    *IndexInfo
	Columns []*IndexColumn
	Options []*IndexOption
}

IndexDefinition describes an index in a CREATE TABLE statement

func (*IndexDefinition) Format

func (idx *IndexDefinition) Format(buf *TrackedBuffer)

Format formats the node.

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.

type IndexInfo

type IndexInfo struct {
	Type    string
	Name    ColIdent
	Primary bool
	Spatial bool
	Unique  bool
}

IndexInfo describes the name and type of an index in a CREATE TABLE statement

func (*IndexInfo) Format

func (ii *IndexInfo) Format(buf *TrackedBuffer)

Format formats the node.

type IndexOption

type IndexOption struct {
	Name  string
	Value *SQLVal
	Using string
}

IndexOption is used for trailing options for indexes: COMMENT, KEY_BLOCK_SIZE, USING

type Insert

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

Insert represents an INSERT or REPLACE statement. Per the MySQL docs, http://dev.mysql.com/doc/refman/5.7/en/replace.html Replace is the counterpart to `INSERT IGNORE`, and works exactly like a normal INSERT except if the row exists. In that case it first deletes the row and re-inserts with new values. For that reason we keep it as an Insert struct. Replaces are currently disallowed in sharded schemas because of the implications the deletion part may have on vindexes. If you add fields here, consider adding them to calls to validateSubquerySamePlan.

func (*Insert) Format

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

Format formats the node.

type InsertRows

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

InsertRows represents the rows for an INSERT statement.

type InsertValues

type InsertValues [][]sqltypes.Value

InsertValues is a custom SQL encoder for the values of an insert statement.

func (InsertValues) EncodeSQL

func (iv InsertValues) EncodeSQL(buf *bytes.Buffer)

EncodeSQL performs the SQL encoding for InsertValues.

type IntervalExpr

type IntervalExpr struct {
	Expr Expr
	Unit string
}

IntervalExpr represents a date-time INTERVAL expression.

func (*IntervalExpr) Format

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

Format formats the node.

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.

type JoinCondition

type JoinCondition struct {
	On    Expr
	Using Columns
}

JoinCondition represents the join conditions (either a ON or USING clause) of a JoinTableExpr.

func (JoinCondition) Format

func (node JoinCondition) Format(buf *TrackedBuffer)

Format formats the node.

type JoinTableExpr

type JoinTableExpr struct {
	LeftExpr  TableExpr
	Join      string
	RightExpr TableExpr
	Condition JoinCondition
}

JoinTableExpr represents a TableExpr that's a JOIN operation.

func (*JoinTableExpr) Format

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

Format formats the node.

type LengthScaleOption

type LengthScaleOption struct {
	Length *SQLVal
	Scale  *SQLVal
}

LengthScaleOption is used for types that have an optional length and scale

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.

type ListArg

type ListArg []byte

ListArg represents a named list argument.

func (ListArg) Format

func (node ListArg) Format(buf *TrackedBuffer)

Format formats the node.

type MarginComments

type MarginComments struct {
	Leading  string
	Trailing string
}

MarginComments holds the leading and trailing comments that surround a query.

func SplitMarginComments

func SplitMarginComments(sql string) (query string, comments MarginComments)

SplitMarginComments pulls out any leading or trailing comments from a raw sql query. This function also trims leading (if there's a comment) and trailing whitespace.

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

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.

type NodeFormatter

type NodeFormatter func(buf *TrackedBuffer, node SQLNode)

NodeFormatter defines the signature of a custom node formatter function that can be given to TrackedBuffer for code generation.

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.

type NullVal

type NullVal struct{}

NullVal represents a NULL value.

func (*NullVal) Format

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

Format formats the node.

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.

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.

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.

type OrderBy

type OrderBy []*Order

OrderBy represents an ORDER By clause.

func (OrderBy) Format

func (node OrderBy) Format(buf *TrackedBuffer)

Format formats the node.

type OtherAdmin

type OtherAdmin struct{}

OtherAdmin represents a misc statement that relies on ADMIN privileges, such as REPAIR, OPTIMIZE, or TRUNCATE statement. It should be used only as an indicator. It does not contain the full AST for the statement.

func (*OtherAdmin) Format

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

Format formats the node.

type OtherRead

type OtherRead struct{}

OtherRead 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 (*OtherRead) Format

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

Format formats the node.

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.

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

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.

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 NewParsedQuery

func NewParsedQuery(node SQLNode) *ParsedQuery

NewParsedQuery returns a ParsedQuery of the ast.

func (*ParsedQuery) GenerateQuery

func (pq *ParsedQuery) GenerateQuery(bindVariables map[string]*querypb.BindVariable, extras map[string]Encodable) ([]byte, error)

GenerateQuery generates a query by substituting the specified bindVariables. The extras parameter specifies special parameters that can perform custom encoding.

type PartitionDefinition

type PartitionDefinition struct {
	Name     ColIdent
	Limit    Expr
	Maxvalue bool
}

PartitionDefinition describes a very minimal partition definition

func (*PartitionDefinition) Format

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

Format formats the node

type PartitionSpec

type PartitionSpec struct {
	Action      string
	Name        ColIdent
	Definitions []*PartitionDefinition
}

PartitionSpec describe partition actions (for alter and create)

func (*PartitionSpec) Format

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

Format formats the node.

type Partitions

type Partitions Columns

Partitions is a type alias for Columns so we can handle printing efficiently

func (Partitions) Format

func (node Partitions) Format(buf *TrackedBuffer)

Format formats the node

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.

type Rollback

type Rollback struct{}

Rollback represents a Rollback statement.

func (*Rollback) Format

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

Format formats the node.

type SQLNode

type SQLNode interface {
	Format(buf *TrackedBuffer)
	// contains filtered or unexported methods
}

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 NewBitVal

func NewBitVal(in []byte) *SQLVal

NewBitVal builds a new BitVal containing a bit literal.

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.

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

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.

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    SetExprs
	Scope    string
}

Set represents a SET statement.

func (*Set) Format

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

Format formats the node.

type SetExpr

type SetExpr struct {
	Name ColIdent
	Expr Expr
}

SetExpr represents a set expression.

func (*SetExpr) Format

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

Format formats the node.

type SetExprs

type SetExprs []*SetExpr

SetExprs represents a list of set expressions.

func (SetExprs) Format

func (node SetExprs) Format(buf *TrackedBuffer)

Format formats the node.

type SetKey

type SetKey struct {
	Key   string
	Scope string
}

SetKey is the extracted key from one SetExpr

type Show

type Show struct {
	Type          string
	OnTable       TableName
	ShowTablesOpt *ShowTablesOpt
	Scope         string
}

Show represents a show statement.

func (*Show) Format

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

Format formats the node.

func (*Show) HasOnTable

func (node *Show) HasOnTable() bool

HasOnTable returns true if the show statement has an "on" clause

type ShowFilter

type ShowFilter struct {
	Like   string
	Filter Expr
}

ShowFilter is show tables filter

func (*ShowFilter) Format

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

Format formats the node.

type ShowTablesOpt

type ShowTablesOpt struct {
	Extended string
	Full     string
	DbName   string
	Filter   *ShowFilter
}

ShowTablesOpt is show tables option

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.

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 in full and returns a Statement, which is the AST representation of the query. If a DDL statement is partially parsed but still contains a syntax error, the error is ignored and the DDL is returned anyway.

Example

ExampleParse is the first example from the README.md.

sql := "SELECT * FROM table WHERE a = 'abc'"
stmt, err := Parse(sql)
if err != nil {
	// Do something with the err
}

// Otherwise do something with stmt
switch stmt := stmt.(type) {
case *Select:
	_ = stmt
case *Insert:
}
Output:

func ParseNext

func ParseNext(tokenizer *Tokenizer) (Statement, error)

ParseNext parses a single SQL statement from the tokenizer returning a Statement which is the AST representation of the query. The tokenizer will always read up to the end of the statement, allowing for the next call to ParseNext to parse any subsequent SQL statements. When there are no more statements to parse, a error of io.EOF is returned.

Example

ExampleParseNext is the second example from the README.md.

r := strings.NewReader("INSERT INTO table1 VALUES (1, 'a'); INSERT INTO table2 VALUES (3, 4);")

tokens := NewTokenizer(r)
for {
	stmt, err := ParseNext(tokens)
	if err == io.EOF {
		break
	}
	// Do something with stmt or err.
	_ = stmt
}
Output:

func ParseStrictDDL

func ParseStrictDDL(sql string) (Statement, error)

ParseStrictDDL is the same as Parse except it errors on partially parsed DDL statements.

type Stream

type Stream struct {
	Comments   Comments
	SelectExpr SelectExpr
	Table      TableName
}

Stream represents a SELECT statement.

func (*Stream) Format

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

Format formats the node.

type Subquery

type Subquery struct {
	Select SelectStatement
}

Subquery represents a subquery.

func (*Subquery) Format

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

Format formats the node.

type SubstrExpr

type SubstrExpr struct {
	Name *ColName
	From Expr
	To   Expr
}

SubstrExpr represents a call to SubstrExpr(column, value_expression) or SubstrExpr(column, value_expression,value_expression) also supported syntax SubstrExpr(column from value_expression for value_expression)

func (*SubstrExpr) Format

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

Format formats the node.

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.

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.

type TableName

type TableName struct {
	Name, Qualifier TableIdent
}

TableName represents a table name. Qualifier, if specified, represents a database or keyspace. TableName is a value struct whose fields are case sensitive. This means two TableName vars can be compared for equality and a TableName can also be used as key in a map.

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.

type TableNames

type TableNames []TableName

TableNames is a list of TableName.

func (TableNames) Format

func (node TableNames) Format(buf *TrackedBuffer)

Format formats the node.

type TableSpec

type TableSpec struct {
	Columns []*ColumnDefinition
	Indexes []*IndexDefinition
	Options string
}

TableSpec describes the structure of a table from a CREATE TABLE statement

func (*TableSpec) AddColumn

func (ts *TableSpec) AddColumn(cd *ColumnDefinition)

AddColumn appends the given column to the list in the spec

func (*TableSpec) AddIndex

func (ts *TableSpec) AddIndex(id *IndexDefinition)

AddIndex appends the given index to the list in the spec

func (*TableSpec) Format

func (ts *TableSpec) Format(buf *TrackedBuffer)

Format formats the node.

type Tokenizer

type Tokenizer struct {
	InStream      io.Reader
	AllowComments bool
	ForceEOF      bool

	Position int

	LastError error

	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 NewTokenizer

func NewTokenizer(r io.Reader) *Tokenizer

NewTokenizer creates a new Tokenizer reading a sql string from the io.Reader.

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 NodeFormatter) *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) EncodeSQL

func (tpl *TupleEqualityList) EncodeSQL(buf *bytes.Buffer)

EncodeSQL 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.

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

type Update

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

Update represents an UPDATE statement. If you add fields here, consider adding them to calls to validateSubquerySamePlan.

func (*Update) Format

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

Format formats the node.

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.

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.

type Use

type Use struct {
	DBName TableIdent
}

Use represents a use statement.

func (*Use) Format

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

Format formats the node.

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.

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.

type ValuesFuncExpr

type ValuesFuncExpr struct {
	Name *ColName
}

ValuesFuncExpr represents a function call.

func (*ValuesFuncExpr) Format

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

Format formats the node.

type VindexParam

type VindexParam struct {
	Key ColIdent
	Val string
}

VindexParam defines a key/value parameter for a CREATE VINDEX statement

func (VindexParam) Format

func (node VindexParam) Format(buf *TrackedBuffer)

Format formats the node.

type VindexSpec

type VindexSpec struct {
	Name   ColIdent
	Type   ColIdent
	Params []VindexParam
}

VindexSpec defines a vindex for a CREATE VINDEX or DROP VINDEX statement

func (*VindexSpec) Format

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

Format formats the node. The "CREATE VINDEX" preamble was formatted in the containing DDL node Format, so this just prints the type, any parameters, and optionally the owner

func (*VindexSpec) ParseParams

func (node *VindexSpec) ParseParams() (string, map[string]string)

ParseParams parses the vindex parameter list, pulling out the special-case "owner" parameter

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.

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.

Directories

Path Synopsis
dependency
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.
querypb
Package query is a generated protocol buffer package.
Package query is a generated protocol buffer package.
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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