Package net.hydromatic.morel.ast

Class Ast.Scan

java.lang.Object

net.hydromatic.morel.ast.AstNode

net.hydromatic.morel.ast.Ast.FromStep

net.hydromatic.morel.ast.Ast.Scan

Enclosing class:

Ast

public static class Ast.Scan
extends Ast.FromStep

A scan (e.g. "e in emps") or scan-and-join (e.g. "left join d in depts on e.deptno = d.deptno") in a from expression.

Field Summary

Fields

Modifier and Type	Field	Description
@Nullable Ast.Exp	condition
Ast.Exp	exp
Ast.Pat	pat

Fields inherited from class net.hydromatic.morel.ast.AstNode

op, pos

Constructor Summary

Constructors

Constructor	Description
Scan(Pos pos, Op op, Ast.Pat pat, Ast.Exp exp, @Nullable Ast.Exp condition)

Method Summary

Modifier and Type	Method	Description
Ast.Scan	accept(Shuttle shuttle)	Accepts a shuttle, calling the Shuttle.visit(net.hydromatic.morel.ast.Ast.Literal) method appropriate to the type of this node, and returning the result.
void	accept(Visitor visitor)	Accepts a visitor, calling the Shuttle.visit(net.hydromatic.morel.ast.Ast.Literal) method appropriate to the type of this node, and returning the result.
Ast.Scan	copy(Ast.Pat pat, Ast.Exp exp, Ast.Exp condition)
(package private) AstWriter	unparse(AstWriter w, int left, int right)

Methods inherited from class net.hydromatic.morel.ast.AstNode

toString, unparse

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

pat

public final Ast.Pat pat

exp

public final Ast.Exp exp

condition

public final @Nullable Ast.Exp condition

Constructor Detail

Scan

Scan(Pos pos,
     Op op,
     Ast.Pat pat,
     Ast.Exp exp,
     @Nullable Ast.Exp condition)

Method Detail

unparse

AstWriter unparse(AstWriter w,
                  int left,
                  int right)

Specified by:

unparse in class AstNode

accept

public Ast.Scan accept(Shuttle shuttle)

Description copied from class: AstNode

Accepts a shuttle, calling the Shuttle.visit(net.hydromatic.morel.ast.Ast.Literal) method appropriate to the type of this node, and returning the result.

Specified by:

accept in class AstNode

accept

public void accept(Visitor visitor)

Description copied from class: AstNode

Accepts a visitor, calling the Shuttle.visit(net.hydromatic.morel.ast.Ast.Literal) method appropriate to the type of this node, and returning the result.

Specified by:

accept in class AstNode

copy

public Ast.Scan copy(Ast.Pat pat,
                     Ast.Exp exp,
                     Ast.Exp condition)