be.SIRAPRISE.ra

Class SemiJoinUsingProxy

java.lang.Object

be.SIRAPRISE.ra.RelationProxy

be.SIRAPRISE.ra.SemiJoinUsingProxy

All Implemented Interfaces:

IRelation

public final class SemiJoinUsingProxy
extends RelationProxy

SemiMinusProxy

Author:

erwin

Constructor Summary

Constructors

Constructor and Description
SemiJoinUsingProxy(IRelation mainOperand, IRelation semiJoinWith, java.util.LinkedHashSet<NameIdentifier> usingAttributes) Creates the SemiMinusProxy

Method Summary

Modifier and Type	Method and Description
java.lang.String	getHostExpressionEvaluationText() Gets The expression text for the expression to be evaluated by the host

Methods inherited from class be.SIRAPRISE.ra.RelationProxy

aggregate, dividedyper, extend, getHost, getRelationBuffer, group, gtclose, intersect, intersectUsing, isProxy, join, joinUsing, leftJoin, leftJoinUsing, minus, minusUsing, pack, project, rename, restrict, semijoin, semijoinUsing, semiminus, semiminusUsing, summarizeby, tclose, transform, ungroup, union, unionUsing, unpack, xminus, xminusUsing

Methods inherited from class java.lang.Object

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

Constructor Detail

SemiJoinUsingProxy

public SemiJoinUsingProxy(IRelation mainOperand,
                          IRelation semiJoinWith,
                          java.util.LinkedHashSet<NameIdentifier> usingAttributes)

Creates the SemiMinusProxy

Parameters:

mainOperand - the 'minuend' of the semiminus

semiJoinWith - the 'subtrahend' of the semiminus

usingAttributes - The set of attributes that are to be treated in 'USING' mode by the semijoin

Method Detail

getHostExpressionEvaluationText

public java.lang.String getHostExpressionEvaluationText()

Description copied from interface: IRelation

Gets The expression text for the expression to be evaluated by the host

Specified by:

getHostExpressionEvaluationText in interface IRelation

Specified by:

getHostExpressionEvaluationText in class RelationProxy

Returns:

The expression text for the expression to be sent to the host for evaluation