mondrian.rolap.sql
Interface SqlConstraint

All Known Subinterfaces:

MemberChildrenConstraint, TupleConstraint

All Known Implementing Classes:

ChildByNameConstraint, DefaultMemberChildrenConstraint, DefaultTupleConstraint, DescendantsConstraint, RolapNativeCrossJoin.NonEmptyCrossJoinConstraint, RolapNativeFilter.FilterConstraint, RolapNativeSet.SetConstraint, RolapNativeTopCount.TopCountConstraint, SqlContextConstraint

public interface SqlConstraint

restricts the members that are fetched by SqlMemberSource.

Since:

Nov 2, 2005

Author:

av

See Also:

SqlMemberSource

Method Summary

java.lang.Object

getCacheKey() Returns a key that becomes part of the key for caching the result of the SQL query.

Method Detail

getCacheKey

java.lang.Object getCacheKey()

Returns a key that becomes part of the key for caching the result of the SQL query. So SqlConstraint instances that produce the same SQL resultset must return equal keys in terms of equal() and hashCode().

Returns:

valid key or null to prevent the result from being cached