com.exasol.sql.dql.select

Class WhereClause

java.lang.Object

com.exasol.sql.AbstractFragment

com.exasol.sql.dql.select.WhereClause

All Implemented Interfaces:

MergeFragment, SelectFragment, Fragment

public class WhereClause
extends AbstractFragment
implements SelectFragment, MergeFragment

This class represents the where clause of an SQL statement. It contains the filter criteria in form of a BooleanExpression.

Field Summary

Fields inherited from class com.exasol.sql.AbstractFragment

root

Constructor Summary

Constructors

Constructor and Description
WhereClause(SqlStatement root, BooleanExpression expression) Create a new instance of a WhereClause

Method Summary

Modifier and Type	Method and Description
void	accept(MergeVisitor visitor) Accept a visitor for MERGE statements
void	accept(SelectVisitor visitor) Accept a visitor for SELECT statements
BooleanExpression	getExpression() Get the boolean expression defining the filter criteria

Methods inherited from class com.exasol.sql.AbstractFragment

getRoot

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.exasol.sql.Fragment

getRoot

Constructor Detail

WhereClause

public WhereClause(SqlStatement root,
                   BooleanExpression expression)

Create a new instance of a WhereClause

Parameters:

root - SQL statement this WHERE clause belongs to

expression - boolean expression servicing as criteria for the WHERE clause

Method Detail

getExpression

public BooleanExpression getExpression()

Get the boolean expression defining the filter criteria

Returns:

boolean expression

accept

public void accept(SelectVisitor visitor)

Accept a visitor for SELECT statements

Specified by:

accept in interface SelectFragment

Parameters:

visitor - SELECT visitor

accept

public void accept(MergeVisitor visitor)

Accept a visitor for MERGE statements

Specified by:

accept in interface MergeFragment

Parameters:

visitor - MERGE visitor