std::size_t SimpleCostModel::estimateCardinalityForTableReference(
const P::TableReferencePtr &physical_plan) {
return physical_plan->relation()->estimateTupleCardinality();
}
void PlanVisualizer::visit(const P::PhysicalPtr &input) {
int node_id = ++id_counter_;
node_id_map_.emplace(input, node_id);
std::set<E::ExprId> referenced_ids;
for (const auto &attr : input->getReferencedAttributes()) {
referenced_ids.emplace(attr->id());
}
for (const auto &child : input->children()) {
visit(child);
int child_id = node_id_map_[child];
edges_.emplace_back(EdgeInfo());
EdgeInfo &edge_info = edges_.back();
edge_info.src_node_id = child_id;
edge_info.dst_node_id = node_id;
edge_info.dashed = false;
if ((input->getPhysicalType() == P::PhysicalType::kHashJoin ||
input->getPhysicalType() == P::PhysicalType::kFilterJoin) &&
child == input->children()[1]) {
edge_info.dashed = true;
}
for (const auto &attr : child->getOutputAttributes()) {
if (referenced_ids.find(attr->id()) != referenced_ids.end()) {
edge_info.labels.emplace_back(attr->attribute_alias());
}
}
}
nodes_.emplace_back(NodeInfo());
NodeInfo &node_info = nodes_.back();
node_info.id = node_id;
if (color_map_.find(input->getName()) != color_map_.end()) {
node_info.color = color_map_[input->getName()];
}
switch (input->getPhysicalType()) {
case P::PhysicalType::kTableReference: {
const P::TableReferencePtr table_reference =
std::static_pointer_cast<const P::TableReference>(input);
node_info.labels.emplace_back(table_reference->relation()->getName());
break;
}
case P::PhysicalType::kHashJoin: {
const P::HashJoinPtr hash_join =
std::static_pointer_cast<const P::HashJoin>(input);
node_info.labels.emplace_back(input->getName());
const auto &left_attributes = hash_join->left_join_attributes();
const auto &right_attributes = hash_join->right_join_attributes();
for (std::size_t i = 0; i < left_attributes.size(); ++i) {
node_info.labels.emplace_back(
left_attributes[i]->attribute_alias() + " = " + right_attributes[i]->attribute_alias());
}
break;
}
case P::PhysicalType::kFilterJoin: {
const P::FilterJoinPtr filter_join =
std::static_pointer_cast<const P::FilterJoin>(input);
node_info.labels.emplace_back(input->getName());
const auto &probe_attributes = filter_join->probe_attributes();
const auto &build_attributes = filter_join->build_attributes();
for (std::size_t i = 0; i < probe_attributes.size(); ++i) {
node_info.labels.emplace_back(
probe_attributes[i]->attribute_alias() + " = " +
build_attributes[i]->attribute_alias());
}
break;
}
default: {
node_info.labels.emplace_back(input->getName());
break;
}
}
const P::PartitionSchemeHeader *partition_scheme_header = input->getOutputPartitionSchemeHeader();
if (partition_scheme_header) {
node_info.labels.emplace_back(partition_scheme_header->toString());
}
if (lip_filter_conf_ != nullptr) {
const auto &build_filters = lip_filter_conf_->getBuildInfoMap();
const auto build_it = build_filters.find(input);
if (build_it != build_filters.end()) {
for (const auto &build_info : build_it->second) {
node_info.labels.emplace_back(
std::string("[LIP build] ") + build_info->build_attribute()->attribute_alias());
}
}
const auto &probe_filters = lip_filter_conf_->getProbeInfoMap();
const auto probe_it = probe_filters.find(input);
if (probe_it != probe_filters.end()) {
for (const auto &probe_info : probe_it->second) {
node_info.labels.emplace_back(
std::string("[LIP probe] ") + probe_info->probe_attribute()->attribute_alias());
}
}
}
try {
const std::size_t estimated_cardinality = cost_model_->estimateCardinality(input);
const double estimated_selectivity = cost_model_->estimateSelectivity(input);
node_info.labels.emplace_back(
"est. # = " + std::to_string(estimated_cardinality));
node_info.labels.emplace_back(
"est. Selectivity = " + std::to_string(estimated_selectivity));
} catch (const std::exception &e) {
// NOTE(jianqiao): CostModel::estimateCardinality() may throw UnsupportedPhysicalPlan
// exception for some type of physical nodes such as CreateTable.
// In this case, we omit the node's cardinality/selectivity information.
}
}