parser

Documentation

Index

• Variables
• func AnyChar(buf string) (string, error)
• func AnyPunct(buf string) (string, error)
• func Char(buf string, c byte) (string, error)
• func Digit(buf string, times int) (match string, rest string, err error)
• func GetDefaultDB(sel ast.StmtNode, dbName string) string
• func Match(buf string, pat func(byte) bool, times int) (match string, rest string, err error)
• func MatchOne(buf string, pat func(byte) bool) (string, error)
• func Number(str string) (int, string, error)
• func RestoreWithDefaultDB(node ast.StmtNode, defaultDB, origin string) string
• func RestoreWithoutDB(node ast.StmtNode) string
• func SimpleCases(node ast.StmtNode, defaultDB, origin string) (s string, ok bool)
• func Space(buf string, times int) (string, error)
• func Space0(buf string) string

Variables

var (
	// ErrPatternNotMatch represents an error that patterns doesn't match.
	ErrPatternNotMatch = errors.New("Pattern not match")
)

Functions

func AnyChar

func AnyChar(buf string) (string, error)

AnyChar matches an arbitrary character

func AnyPunct

func AnyPunct(buf string) (string, error)

AnyPunct matches an arbitrary punctuation

func Char

func Char(buf string, c byte) (string, error)

Char matches a character: c

func Digit

func Digit(buf string, times int) (match string, rest string, err error)

Digit matches at least `times` digits

func GetDefaultDB

func GetDefaultDB(sel ast.StmtNode, dbName string) string

GetDefaultDB checks if all tables in the AST have explicit DBName. If not, return specified DBName.

func Match

func Match(buf string, pat func(byte) bool, times int) (match string, rest string, err error)

Match matches the `pat` at least `times`, and returns the match, the rest and the error

func MatchOne

func MatchOne(buf string, pat func(byte) bool) (string, error)

MatchOne matches only one time with pat

func Number

func Number(str string) (int, string, error)

Number matches a series of digits and convert it to an int

func RestoreWithDefaultDB

func RestoreWithDefaultDB(node ast.StmtNode, defaultDB, origin string) string

RestoreWithDefaultDB returns restore strings for StmtNode with defaultDB This function is customized for SQL bind usage.

func RestoreWithoutDB

func RestoreWithoutDB(node ast.StmtNode) string

RestoreWithoutDB returns restore strings for StmtNode without schema name. This function is customized for universal SQL binding.

func SimpleCases

func SimpleCases(node ast.StmtNode, defaultDB, origin string) (s string, ok bool)

SimpleCases captures simple SQL statements and uses string replacement instead of `restore` to improve performance. See https://github.com/pingcap/tidb/issues/22398.

func Space

func Space(buf string, times int) (string, error)

Space matches at least `times` spaces

func Space0

func Space0(buf string) string

Space0 matches at least 0 space.