be.SIRAPRISE.ra

Class GroupProxy

java.lang.Object

be.SIRAPRISE.ra.RelationProxy

be.SIRAPRISE.ra.GroupProxy

All Implemented Interfaces:

IRelation

public class GroupProxy
extends RelationProxy

Author:

erwin

Constructor Summary

Constructors

Constructor and Description
GroupProxy(RelationProxy groupInput, java.util.Map<NameIdentifier,java.util.Set<NameIdentifier>> groupAttributes)

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

GroupProxy

public GroupProxy(RelationProxy groupInput,
                  java.util.Map<NameIdentifier,java.util.Set<NameIdentifier>> groupAttributes)

Parameters:

groupInput - the argument to be subjected to the grouping

groupAttributes - The specification of the groupings to be applied. Each entry consists of an attribute name for the relation-valued attribute in the result, and the set of attributes of this relation that that relation-typed attribute is to include.

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