tupleMemory = new LeftTupleIndexHashTable( indexes );
} else {
tupleMemory = new LeftTupleList();
}
RightTupleMemory factHandleMemory;
if ( conf.isIndexRightBetaMemory() ) {
factHandleMemory = new RightTupleIndexHashTable( indexes );
} else {
factHandleMemory = new RightTupleList();
}