@Override
public void meet(Projection node) throws OptimizationException {
super.meet(node);
// we need to check if we have inserted some value constant
// from a filter and if this is part of the projection. If yes
// we need to actually project it
if (!insertedValues.isEmpty()) {
node.replaceWith(
new ProjectionWithBindings(node.getArg(), node.getProjectionElemList(), insertedValues));
}
}
@Override
public void meetOther(QueryModelNode node) {
if (node instanceof FilterTuple) {
handleFilter((FilterTuple) node, filterExpr);
} else if (node instanceof StatementTupleExpr) {
// TODO check if we still can remove!!!
} else {
// TODO we maybe have to adjust canRemove here
super.meetOther(node);
}
}
@Override
public void meet(Filter filter) {
super.meet(filter);
FilterRelocator.relocate(filter);
}
@Override
public void meet(Var var) {
if (var.getValue() == null) vars.add(var.getName());
super.meet(var);
}