be.SIRAPRISE.ra

Class GTCloseProxy

java.lang.Object

be.SIRAPRISE.ra.RelationProxy

be.SIRAPRISE.ra.GTCloseProxy

All Implemented Interfaces:

IRelation

public class GTCloseProxy
extends RelationProxy

Author:

erwin

Constructor Summary

Constructors

Constructor and Description
GTCloseProxy(RelationProxy gtcloseInput, java.util.Map<NameIdentifier,NameIdentifier> matchby, java.util.Map<NameIdentifier,java.lang.String> expressions)

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

GTCloseProxy

public GTCloseProxy(RelationProxy gtcloseInput,
                    java.util.Map<NameIdentifier,NameIdentifier> matchby,
                    java.util.Map<NameIdentifier,java.lang.String> expressions)

Parameters:

gtcloseInput - the argument to be subjected to the generalized transitive closure

matchby - The specs of which attribute values will be compared to which, to determine matching tuple pairs that will give rise to an additional ("transitive") tuple in the output

expressions - The expressions that will determine the values for all attributes not mentioned in matchby, in all new tuples produced by the transitive closure

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