if ( isUnlinkingEnabled() ) {
RightTupleSets stagedRightTuples = memory.getStagedRightTuples();
switch ( rightTuple.getStagedType() ) {
// handle clash with already staged entries
case LeftTuple.INSERT:
stagedRightTuples.removeInsert( rightTuple );
break;
case LeftTuple.UPDATE:
stagedRightTuples.removeUpdate( rightTuple );
break;
}