childLeftTuple.getLeftTupleSink() );
if ( srcVarIndexes != null ) {
QueryElementFactHandle qeh = (QueryElementFactHandle) childLeftTuple.getLastHandle();
for ( int i = 0; i < trgVars.size(); i++ ) {
Variable v = trgVars.get( i );
v.unSet();
}
}
childLeftTuple = childLeftTuple.getLeftParentNext();
temp.setLeftParentNext( null );