parser

Documentation

Index

• Constants
• Variables
• type Parser
  • func New() *Parser
  • func (parser *Parser) Parse(sql, charset, collation string) ([]ast.StmtNode, error)
  • func (parser *Parser) ParseOneStmt(sql, charset, collation string) (ast.StmtNode, error)
• type Pos
• type Scanner
  • func NewScanner(s string) *Scanner
  • func (s *Scanner) Errorf(format string, a ...interface{})
  • func (s *Scanner) Errors() []error
  • func (s *Scanner) Lex(v *yySymType) int

Constants

const (
	CodeSyntaxErr terror.ErrCode = 1
)

Error codes.

Variables

var (
	ErrSyntax = terror.ClassParser.New(CodeSyntaxErr, "syntax error")
)

Error instances.

Types

type Parser

type Parser struct {
	// contains filtered or unexported fields
}

Parser represents a parser instance. Some temporary objects are stored in it to reduce object allocation during Parse function.

func New

func New() *Parser

New returns a Parser object.

func (*Parser) Parse

func (parser *Parser) Parse(sql, charset, collation string) ([]ast.StmtNode, error)

Parse parses a query string to raw ast.StmtNode. If charset or collation is "", default charset and collation will be used.

func (*Parser) ParseOneStmt

func (parser *Parser) ParseOneStmt(sql, charset, collation string) (ast.StmtNode, error)

ParseOneStmt parses a query and returns an ast.StmtNode. The query must have one statement, otherwise ErrSyntax is returned.

type Pos

type Pos struct {
	Line   int
	Col    int
	Offset int
}

Pos represents the position of a token.

type Scanner

type Scanner struct {
	// contains filtered or unexported fields
}

Scanner implements the yyLexer interface.

func NewScanner

func NewScanner(s string) *Scanner

NewScanner returns a new scanner object.

func (*Scanner) Errorf

func (s *Scanner) Errorf(format string, a ...interface{})

Errorf tells scanner something is wrong. Scanner satisfies yyLexer interface which need this function.

func (*Scanner) Errors

func (s *Scanner) Errors() []error

Errors returns the errors during a scan.

func (*Scanner) Lex

func (s *Scanner) Lex(v *yySymType) int

Lex returns a token and store the token value in v. Scanner satisfies yyLexer interface. 0 and invalid are special token id this function would return: return 0 tells parser that scanner meets EOF, return invalid tells parser that scanner meets illegal character.