parser

package

v0.0.0-...-2533219 Latest Latest Go to latest Published: Mar 17, 2021 License: BSD-3-Clause Imports: 6 Imported by: 0

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Repository

github.com/LIVEauctioneers/ramsql

Documentation ¶

Overview ¶

Package parser implements a parser for SQL statements

Inspired by go/parser

Index ¶

Constants
func ParseDate(data string) (*time.Time, error)
type Decl
- func NewDecl(t Token) *Decl
- func (d *Decl) Add(subDecl *Decl)
- func (d Decl) Stringy(depth int)
type Instruction
- func ParseInstruction(instruction string) ([]Instruction, error)
- func (i Instruction) PrettyPrint()
type Matcher
type Token

Constants ¶

View Source

const (
	SpaceToken = iota
	SemicolonToken
	CommaToken
	BracketOpeningToken
	BracketClosingToken
	LeftDipleToken
	RightDipleToken
	LessOrEqualToken
	GreaterOrEqualToken
	BacktickToken

	DoubleQuoteToken
	SimpleQuoteToken
	StarToken
	EqualityToken
	InequalityToken
	PeriodToken

	CreateToken
	SelectToken
	InsertToken
	UpdateToken
	DeleteToken
	ExplainToken
	TruncateToken
	DropToken
	GrantToken

	FromToken
	WhereToken
	TableToken
	IntoToken
	ValuesToken
	JoinToken
	OnToken
	IfToken
	NotToken
	ExistsToken
	NullToken
	AutoincrementToken
	CountToken
	SetToken
	OrderToken
	ByToken
	WithToken
	TimeToken
	ZoneToken
	ReturningToken
	InToken
	AndToken
	OrToken
	AscToken
	DescToken
	LimitToken
	IsToken
	ForToken
	DefaultToken
	LocalTimestampToken
	FalseToken
	UniqueToken
	NowToken
	OffsetToken

	TextToken
	IntToken
	PrimaryToken
	KeyToken
	StringToken
	NumberToken
	DateToken
)

SQL Tokens

View Source

const DateLongFormat = "2006-01-02 15:04:05.999999999 -0700 MST"

DateLongFormat is same as time.Time#String(), except this does not include monotonic time section

View Source

const DateNumberFormat = "2006-01-02"

View Source

const DateShortFormat = "2006-Jan-02"

DateShortFormat is a short format

Variables ¶

This section is empty.

Functions ¶

func ParseDate ¶

func ParseDate(data string) (*time.Time, error)

ParseDate intends to parse all SQL date format

Types ¶

type Decl ¶

type Decl struct {
	Token  int
	Lexeme string
	Decl   []*Decl
}

Decl structure is the node to statement declaration tree

func NewDecl ¶

func NewDecl(t Token) *Decl

NewDecl initialize a Decl struct from a given token

func (*Decl) Add ¶

func (d *Decl) Add(subDecl *Decl)

Add creates a new leaf with given Decl

func (Decl) Stringy ¶

func (d Decl) Stringy(depth int)

Stringy prints the declaration tree in console

type Instruction ¶

type Instruction struct {
	Decls []*Decl
}

Instruction define a valid SQL statement

func ParseInstruction ¶

func ParseInstruction(instruction string) ([]Instruction, error)

ParseInstruction calls lexer and parser, then return Decl tree for each instruction

func (Instruction) PrettyPrint ¶

func (i Instruction) PrettyPrint()

PrettyPrint prints instruction's declarations on console with indentation

type Matcher ¶

type Matcher func() bool

Matcher tries to match given string to an SQL token

type Token ¶

type Token struct {
	Token  int
	Lexeme string
}

Token struct holds token id and it's lexeme

Source Files ¶

View all Source files

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