sqlparser

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Published: Jul 6, 2021 License: MIT Imports: 7 Imported by: 0

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Constants

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

Select.Lock

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

Union.Type

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

JoinTableExpr.Join

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

Where.Type

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

ComparisonExpr.Operator

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

RangeCond.Operator

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

NullCheck.Operator

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

BinaryExpr.Operator

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

UnaryExpr.Operator

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

Order.Direction

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const ALL = 57359
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const ALTER = 57413
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const ANALYZE = 57416
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const AND = 57404
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const AS = 57361
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const ASC = 57368
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const (
	AST_DISTINCT = "distinct "
)

Select.Distinct

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const (
	AST_FROM = "from"
)

From.Type

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const BETWEEN = 57366
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const BY = 57356
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const CASE = 57407
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const COMMENT = 57383
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const CREATE = 57412
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const CROSS = 57398
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const DEFAULT = 57374
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const DELETE = 57350
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const DESC = 57369
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const DESCRIBE = 57426
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const DISTINCT = 57360
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const DROP = 57414
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const DUPLICATE = 57372
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const ELSE = 57410
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const END = 57411
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const EOFCHAR = 0x100
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const EXCEPT = 57390
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const EXISTS = 57362
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const EXPLAIN = 57427
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const FOR = 57358
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const FORCE = 57401
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const FROM = 57351
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const GE = 57385
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const GROUP = 57353
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const HAVING = 57354
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const ID = 57378
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const IF = 57422
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const IGNORE = 57421
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const IN = 57363
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const INDEX = 57418
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const INNER = 57396
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const INSERT = 57348
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const INTERSECT = 57391
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const INTO = 57371
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const IS = 57364
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const JOIN = 57392
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const KEY = 57373
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const KEYRANGE = 57377
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const LE = 57384
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const LEFT = 57394
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const LEX_ERROR = 57346
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const LIKE = 57365
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const LIMIT = 57357
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const LIST_ARG = 57382
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const LOCK = 57376
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const MINUS = 57389
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const NATURAL = 57399
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const NE = 57386
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const NOT = 57405
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const NULL = 57367
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const NULL_SAFE_EQUAL = 57387
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const NUMBER = 57380
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const ON = 57402
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const OR = 57403
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const ORDER = 57355
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const OUTER = 57397
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const RENAME = 57415
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const RIGHT = 57395
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const SELECT = 57347
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const SET = 57375
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const SHOW = 57425
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const STRAIGHT_JOIN = 57393
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const STRING = 57379
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const TABLE = 57417
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const THEN = 57409
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const TO = 57420
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const UNARY = 57406
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const UNION = 57388
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const UNIQUE = 57423
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const UPDATE = 57349
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const USE = 57400
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const USING = 57424
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const VALUES = 57370
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const VALUE_ARG = 57381
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const VIEW = 57419
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const WHEN = 57408
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const WHERE = 57352

Variables

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var (
	SHARE        = []byte("share")
	MODE         = []byte("mode")
	IF_BYTES     = []byte("if")
	VALUES_BYTES = []byte("values")
)
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var Aggregates = map[string]bool{
	"avg":          true,
	"bit_and":      true,
	"bit_or":       true,
	"bit_xor":      true,
	"count":        true,
	"group_concat": true,
	"max":          true,
	"min":          true,
	"std":          true,
	"stddev_pop":   true,
	"stddev_samp":  true,
	"stddev":       true,
	"sum":          true,
	"var_pop":      true,
	"var_samp":     true,
	"variance":     true,
}

Aggregates is a map of all aggregate functions.

Functions

func AsInterface

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

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

func EncodeValue

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

func FetchBindVar

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

func ForceEOF

func ForceEOF(yylex interface{})

func Fuzz

func Fuzz(data []byte) int

func GetColName

func GetColName(node Expr) string

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

func GetTableName

func GetTableName(node SimpleTableExpr) string

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

func HasINClause

func HasINClause(conditions []BoolExpr) bool

HasINCaluse returns true if any of the conditions has an IN clause.

func IsColName

func IsColName(node ValExpr) bool

IsColName returns true if the ValExpr is a *ColName.

func IsSimpleTuple

func IsSimpleTuple(node ValExpr) bool

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

func IsValue

func IsValue(node ValExpr) bool

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

func Magicify

func Magicify(sql string, tableName string) string

Magicify runs the SQL passed in, and a table name, throught a customized TextQL SQL Parser. This provides the following functionality:

- Queries that do not start with SELECT are implictly mapped to SELECT statements
- Queries that are missing a FROM, have the FROM inserted with tableName

func SetAllowComments

func SetAllowComments(yylex interface{}, allow bool)

func SetParseTree

func SetParseTree(yylex interface{}, stmt Statement)

func String

func String(node SQLNode) string

String returns a string representation of an SQLNode.

func StringIn

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

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

Types

type AliasedTableExpr

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

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

func (*AliasedTableExpr) Format

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

func (*AliasedTableExpr) ITableExpr

func (*AliasedTableExpr) ITableExpr()

type AndExpr

type AndExpr struct {
	Left, Right BoolExpr
}

AndExpr represents an AND expression.

func (*AndExpr) Format

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

func (*AndExpr) IBoolExpr

func (*AndExpr) IBoolExpr()

func (*AndExpr) IExpr

func (*AndExpr) IExpr()

type BinaryExpr

type BinaryExpr struct {
	Operator    byte
	Left, Right Expr
}

BinaryExpr represents a binary value expression.

func (*BinaryExpr) Format

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

func (*BinaryExpr) IExpr

func (*BinaryExpr) IExpr()

func (*BinaryExpr) IValExpr

func (*BinaryExpr) IValExpr()

type BoolExpr

type BoolExpr interface {
	IBoolExpr()
	Expr
}

BoolExpr represents a boolean expression.

type CaseExpr

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

CaseExpr represents a CASE expression.

func (*CaseExpr) Format

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

func (*CaseExpr) IExpr

func (*CaseExpr) IExpr()

func (*CaseExpr) IValExpr

func (*CaseExpr) IValExpr()

type ColName

type ColName struct {
	Name, Qualifier []byte
}

ColName represents a column name.

func (*ColName) Format

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

func (*ColName) IExpr

func (*ColName) IExpr()

func (*ColName) IValExpr

func (*ColName) IValExpr()

type ColTuple

type ColTuple interface {
	IColTuple()
	ValExpr
}

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

type Columns

type Columns []SelectExpr

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

func (Columns) Format

func (node Columns) Format(buf *TrackedBuffer)

type Comments

type Comments [][]byte

Comments represents a list of comments.

func (Comments) Format

func (node Comments) Format(buf *TrackedBuffer)

type ComparisonExpr

type ComparisonExpr struct {
	Operator    string
	Left, Right ValExpr
}

ComparisonExpr represents a two-value comparison expression.

func (*ComparisonExpr) Format

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

func (*ComparisonExpr) IBoolExpr

func (*ComparisonExpr) IBoolExpr()

func (*ComparisonExpr) IExpr

func (*ComparisonExpr) IExpr()

type DDL

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

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

func (*DDL) Format

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

func (*DDL) IStatement

func (*DDL) IStatement()

type Delete

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

Delete represents a DELETE statement.

func (*Delete) Format

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

func (*Delete) IStatement

func (*Delete) IStatement()

type EncoderFunc

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

type ExistsExpr

type ExistsExpr struct {
	Subquery *Subquery
}

ExistsExpr represents an EXISTS expression.

func (*ExistsExpr) Format

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

func (*ExistsExpr) IBoolExpr

func (*ExistsExpr) IBoolExpr()

func (*ExistsExpr) IExpr

func (*ExistsExpr) IExpr()

type Expr

type Expr interface {
	IExpr()
	SQLNode
}

Expr represents an expression.

type From

type From struct {
	Type string
	Expr TableExprs
}

From represents a FROM clause

func NewFrom

func NewFrom(typ string, expr TableExprs) *From

NewFrom creates a FROM clause of a table list expression. If the expression is nil, it returns nil.

func (*From) Format

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

type FuncExpr

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

FuncExpr represents a function call.

func (*FuncExpr) Format

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

func (*FuncExpr) IExpr

func (*FuncExpr) IExpr()

func (*FuncExpr) IValExpr

func (*FuncExpr) IValExpr()

func (*FuncExpr) IsAggregate

func (node *FuncExpr) IsAggregate() bool

type GroupBy

type GroupBy []ValExpr

GroupBy represents a GROUP BY clause.

func (GroupBy) Format

func (node GroupBy) Format(buf *TrackedBuffer)

type IndexHints

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

IndexHints represents a list of index hints.

func (*IndexHints) Format

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

type Insert

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

Insert represents an INSERT statement.

func (*Insert) Format

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

func (*Insert) IStatement

func (*Insert) IStatement()

type InsertRows

type InsertRows interface {
	IInsertRows()
	SQLNode
}

InsertRows represents the rows for an INSERT statement.

type JoinTableExpr

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

JoinTableExpr represents a TableExpr that's a JOIN operation.

func (*JoinTableExpr) Format

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

func (*JoinTableExpr) ITableExpr

func (*JoinTableExpr) ITableExpr()

type KeyrangeExpr

type KeyrangeExpr struct {
	Start, End ValExpr
}

KeyrangeExpr represents a KEYRANGE expression.

func (*KeyrangeExpr) Format

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

func (*KeyrangeExpr) IBoolExpr

func (*KeyrangeExpr) IBoolExpr()

func (*KeyrangeExpr) IExpr

func (*KeyrangeExpr) IExpr()

type Limit

type Limit struct {
	Offset, Rowcount ValExpr
}

Limit represents a LIMIT clause.

func (*Limit) Format

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

func (*Limit) Limits

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

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

type ListArg

type ListArg []byte

ListArg represents a named list argument.

func (ListArg) Format

func (node ListArg) Format(buf *TrackedBuffer)

func (ListArg) IColTuple

func (ListArg) IColTuple()

func (ListArg) IExpr

func (ListArg) IExpr()

func (ListArg) IValExpr

func (ListArg) IValExpr()

type NonStarExpr

type NonStarExpr struct {
	Expr Expr
	As   []byte
}

NonStarExpr defines a non-'*' select expr.

func (*NonStarExpr) Format

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

func (*NonStarExpr) ISelectExpr

func (*NonStarExpr) ISelectExpr()

type NotExpr

type NotExpr struct {
	Expr BoolExpr
}

NotExpr represents a NOT expression.

func (*NotExpr) Format

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

func (*NotExpr) IBoolExpr

func (*NotExpr) IBoolExpr()

func (*NotExpr) IExpr

func (*NotExpr) IExpr()

type NullCheck

type NullCheck struct {
	Operator string
	Expr     ValExpr
}

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

func (*NullCheck) Format

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

func (*NullCheck) IBoolExpr

func (*NullCheck) IBoolExpr()

func (*NullCheck) IExpr

func (*NullCheck) IExpr()

type NullVal

type NullVal struct{}

NullVal represents a NULL value.

func (*NullVal) Format

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

func (*NullVal) IExpr

func (*NullVal) IExpr()

func (*NullVal) IValExpr

func (*NullVal) IValExpr()

type NumVal

type NumVal []byte

NumVal represents a number.

func (NumVal) Format

func (node NumVal) Format(buf *TrackedBuffer)

func (NumVal) IExpr

func (NumVal) IExpr()

func (NumVal) IValExpr

func (NumVal) IValExpr()

type OnDup

type OnDup UpdateExprs

OnDup represents an ON DUPLICATE KEY clause.

func (OnDup) Format

func (node OnDup) Format(buf *TrackedBuffer)

type OrExpr

type OrExpr struct {
	Left, Right BoolExpr
}

OrExpr represents an OR expression.

func (*OrExpr) Format

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

func (*OrExpr) IBoolExpr

func (*OrExpr) IBoolExpr()

func (*OrExpr) IExpr

func (*OrExpr) IExpr()

type Order

type Order struct {
	Expr      ValExpr
	Direction string
}

Order represents an ordering expression.

func (*Order) Format

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

type OrderBy

type OrderBy []*Order

OrderBy represents an ORDER By clause.

func (OrderBy) Format

func (node OrderBy) Format(buf *TrackedBuffer)

type Other

type Other struct{}

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

func (*Other) Format

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

func (*Other) IStatement

func (*Other) IStatement()

type ParenBoolExpr

type ParenBoolExpr struct {
	Expr BoolExpr
}

ParenBoolExpr represents a parenthesized boolean expression.

func (*ParenBoolExpr) Format

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

func (*ParenBoolExpr) IBoolExpr

func (*ParenBoolExpr) IBoolExpr()

func (*ParenBoolExpr) IExpr

func (*ParenBoolExpr) IExpr()

type ParenTableExpr

type ParenTableExpr struct {
	Expr TableExpr
}

ParenTableExpr represents a parenthesized TableExpr.

func (*ParenTableExpr) Format

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

func (*ParenTableExpr) ITableExpr

func (*ParenTableExpr) ITableExpr()

type ParsedQuery

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

func (*ParsedQuery) GenerateQuery

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

func (*ParsedQuery) MarshalJSON

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

type RangeCond

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

RangeCond represents a BETWEEN or a NOT BETWEEN expression.

func (*RangeCond) Format

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

func (*RangeCond) IBoolExpr

func (*RangeCond) IBoolExpr()

func (*RangeCond) IExpr

func (*RangeCond) IExpr()

type RowTuple

type RowTuple interface {
	IRowTuple()
	ValExpr
}

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

type SQLNode

type SQLNode interface {
	Format(buf *TrackedBuffer)
}

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

type Select

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

Select represents a SELECT statement.

func (*Select) Format

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

func (*Select) IInsertRows

func (*Select) IInsertRows()

func (*Select) ISelectStatement

func (*Select) ISelectStatement()

func (*Select) IStatement

func (*Select) IStatement()

type SelectExpr

type SelectExpr interface {
	ISelectExpr()
	SQLNode
}

SelectExpr represents a SELECT expression.

type SelectExprs

type SelectExprs []SelectExpr

SelectExprs represents SELECT expressions.

func (SelectExprs) Format

func (node SelectExprs) Format(buf *TrackedBuffer)

type SelectStatement

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

SelectStatement any SELECT statement.

type Set

type Set struct {
	Comments Comments
	Exprs    UpdateExprs
}

Set represents a SET statement.

func (*Set) Format

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

func (*Set) IStatement

func (*Set) IStatement()

type SimpleTableExpr

type SimpleTableExpr interface {
	ISimpleTableExpr()
	SQLNode
}

SimpleTableExpr represents a simple table expression.

type StarExpr

type StarExpr struct {
	TableName []byte
}

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

func (*StarExpr) Format

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

func (*StarExpr) ISelectExpr

func (*StarExpr) ISelectExpr()

type Statement

type Statement interface {
	IStatement()
	SQLNode
}

Statement represents a statement.

func Parse

func Parse(sql string) (Statement, error)

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

type StrVal

type StrVal []byte

StrVal represents a string value.

func (StrVal) Format

func (node StrVal) Format(buf *TrackedBuffer)

func (StrVal) IExpr

func (StrVal) IExpr()

func (StrVal) IValExpr

func (StrVal) IValExpr()

type Subquery

type Subquery struct {
	Select SelectStatement
}

Subquery represents a subquery.

func (*Subquery) Format

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

func (*Subquery) IColTuple

func (*Subquery) IColTuple()

func (*Subquery) IExpr

func (*Subquery) IExpr()

func (*Subquery) IRowTuple

func (*Subquery) IRowTuple()

func (*Subquery) ISimpleTableExpr

func (*Subquery) ISimpleTableExpr()

func (*Subquery) IValExpr

func (*Subquery) IValExpr()

type TableExpr

type TableExpr interface {
	ITableExpr()
	SQLNode
}

TableExpr represents a table expression.

type TableExprs

type TableExprs []TableExpr

TableExprs represents a list of table expressions.

func (TableExprs) Format

func (node TableExprs) Format(buf *TrackedBuffer)

type TableName

type TableName struct {
	Name, Qualifier []byte
}

TableName represents a table name.

func (*TableName) Format

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

func (*TableName) ISimpleTableExpr

func (*TableName) ISimpleTableExpr()

type Tokenizer

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

	Position int

	LastError string

	ParseTree Statement
	// contains filtered or unexported fields
}

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

func NewStringTokenizer

func NewStringTokenizer(sql string) *Tokenizer

NewStringTokenizer creates a new Tokenizer for the sql string.

func (*Tokenizer) ConsumeNext

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

func (*Tokenizer) Error

func (tkn *Tokenizer) Error(err string)

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

func (*Tokenizer) Lex

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

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

func (*Tokenizer) Scan

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

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

type TrackedBuffer

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

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

func NewTrackedBuffer

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

func (*TrackedBuffer) HasBindVars

func (buf *TrackedBuffer) HasBindVars() bool

func (*TrackedBuffer) Myprintf

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

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

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

func (*TrackedBuffer) ParsedQuery

func (buf *TrackedBuffer) ParsedQuery() *ParsedQuery

func (*TrackedBuffer) WriteArg

func (buf *TrackedBuffer) WriteArg(arg string)

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

type TupleEqualityList

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

func (*TupleEqualityList) Encode

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

type UnaryExpr

type UnaryExpr struct {
	Operator byte
	Expr     Expr
}

UnaryExpr represents a unary value expression.

func (*UnaryExpr) Format

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

func (*UnaryExpr) IExpr

func (*UnaryExpr) IExpr()

func (*UnaryExpr) IValExpr

func (*UnaryExpr) IValExpr()

type Union

type Union struct {
	Type        string
	Left, Right SelectStatement
}

Union represents a UNION statement.

func (*Union) Format

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

func (*Union) IInsertRows

func (*Union) IInsertRows()

func (*Union) ISelectStatement

func (*Union) ISelectStatement()

func (*Union) IStatement

func (*Union) IStatement()

type Update

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

Update represents an UPDATE statement.

func (*Update) Format

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

func (*Update) IStatement

func (*Update) IStatement()

type UpdateExpr

type UpdateExpr struct {
	Name *ColName
	Expr ValExpr
}

UpdateExpr represents an update expression.

func (*UpdateExpr) Format

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

type UpdateExprs

type UpdateExprs []*UpdateExpr

UpdateExprs represents a list of update expressions.

func (UpdateExprs) Format

func (node UpdateExprs) Format(buf *TrackedBuffer)

type ValArg

type ValArg []byte

ValArg represents a named bind var argument.

func (ValArg) Format

func (node ValArg) Format(buf *TrackedBuffer)

func (ValArg) IExpr

func (ValArg) IExpr()

func (ValArg) IValExpr

func (ValArg) IValExpr()

type ValExpr

type ValExpr interface {
	IValExpr()
	Expr
}

ValExpr represents a value expression.

type ValExprs

type ValExprs []ValExpr

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

func (ValExprs) Format

func (node ValExprs) Format(buf *TrackedBuffer)

type ValTuple

type ValTuple ValExprs

ValTuple represents a tuple of actual values.

func (ValTuple) Format

func (node ValTuple) Format(buf *TrackedBuffer)

func (ValTuple) IColTuple

func (ValTuple) IColTuple()

func (ValTuple) IExpr

func (ValTuple) IExpr()

func (ValTuple) IRowTuple

func (ValTuple) IRowTuple()

func (ValTuple) IValExpr

func (ValTuple) IValExpr()

type Values

type Values []RowTuple

Values represents a VALUES clause.

func (Values) Format

func (node Values) Format(buf *TrackedBuffer)

func (Values) IInsertRows

func (Values) IInsertRows()

type When

type When struct {
	Cond BoolExpr
	Val  ValExpr
}

When represents a WHEN sub-expression.

func (*When) Format

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

type Where

type Where struct {
	Type string
	Expr BoolExpr
}

Where represents a WHERE or HAVING clause.

func NewWhere

func NewWhere(typ string, expr BoolExpr) *Where

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

func (*Where) Format

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

Directories

Path Synopsis
Package sqltypes implements interfaces and types that represent SQL values.
Package sqltypes implements interfaces and types that represent SQL values.

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