P::PhysicalPtr ReduceGroupByAttributes::applyInternal(const P::PhysicalPtr &input) {
std::vector<P::PhysicalPtr> new_children;
for (const P::PhysicalPtr &child : input->children()) {
new_children.push_back(applyInternal(child));
}
if (new_children != input->children()) {
return applyToNode(input->copyWithNewChildren(new_children));
} else {
return applyToNode(input);
}
}
P::PhysicalPtr InjectJoinFilters::transformHashJoinToFilters(
const P::PhysicalPtr &input) const {
std::vector<P::PhysicalPtr> new_children;
for (const P::PhysicalPtr &child : input->children()) {
new_children.emplace_back(transformHashJoinToFilters(child));
}
P::HashJoinPtr hash_join;
if (P::SomeHashJoin::MatchesWithConditionalCast(input, &hash_join) &&
isTransformable(hash_join)) {
const bool is_anti_join =
hash_join->join_type() == P::HashJoin::JoinType::kLeftAntiJoin;
DCHECK_EQ(2u, new_children.size());
P::PhysicalPtr build_child = new_children[1];
E::PredicatePtr build_side_filter_predicate = nullptr;
P::SelectionPtr selection;
if (hash_join->build_predicate() == nullptr) {
if (P::SomeSelection::MatchesWithConditionalCast(build_child, &selection) &&
E::SubsetOfExpressions(hash_join->right_join_attributes(),
selection->input()->getOutputAttributes())) {
build_child = selection->input();
build_side_filter_predicate = selection->filter_predicate();
}
} else {
build_child = hash_join->right();
build_side_filter_predicate = hash_join->build_predicate();
}
return P::FilterJoin::Create(new_children[0],
build_child,
hash_join->left_join_attributes(),
hash_join->right_join_attributes(),
hash_join->project_expressions(),
build_side_filter_predicate,
is_anti_join,
hash_join->hasRepartition(),
hash_join->cloneOutputPartitionSchemeHeader());
}
if (input->children() != new_children) {
return input->copyWithNewChildren(new_children);
} else {
return input;
}
}
