be.SIRAPRISE.ra

Class UnpackProxy

java.lang.Object

be.SIRAPRISE.ra.RelationProxy

be.SIRAPRISE.ra.UnpackProxy

All Implemented Interfaces:

IRelation

public class UnpackProxy
extends RelationProxy

UnpackProxy

Author:

erwin

Constructor Summary

Constructors

Constructor and Description
UnpackProxy(RelationProxy unpackInput, java.util.Set<NameIdentifier> unpackAttributes) Creates the UnpackProxy

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

UnpackProxy

public UnpackProxy(RelationProxy unpackInput,
                   java.util.Set<NameIdentifier> unpackAttributes)

Creates the UnpackProxy

Parameters:

unpackInput - the relation to be unpacked

unpackAttributes - the set of attrbibute names over which to unpack.

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