/*
* Helper method responsible for inserting the results of the aggregation
* into a new tuple in the output tile group as well as passing through any
* additional columns from the input tile group.
*
* Output tuple is projected from two tuples:
* Left is the 'delegate' tuple, which is usually the first tuple in the group,
* used to retrieve pass-through values;
* Right is the tuple holding all aggregated values.
*/
bool Helper(const planner::AggregatePlan *node, AbstractAttributeAggregator **aggregates,
storage::AbstractTable *output_table,
const AbstractTuple *delegate_tuple,
executor::ExecutorContext *econtext) {
auto schema = output_table->GetSchema();
std::unique_ptr<storage::Tuple> tuple(new storage::Tuple(schema, true));
/*
* 1) Construct a vector of aggregated values
*/
std::vector<type::Value> aggregate_values;
auto &aggregate_terms = node->GetUniqueAggTerms();
for (oid_t column_itr = 0; column_itr < aggregate_terms.size();
column_itr++) {
if (aggregates[column_itr] != nullptr) {
type::Value final_val = aggregates[column_itr]->Finalize();
aggregate_values.push_back(final_val);
}
}
/*
* 2) Evaluate filter predicate;
* if fail, just return
*/
std::unique_ptr<ContainerTuple<std::vector<type::Value>>>
aggref_tuple(new ContainerTuple<std::vector<type::Value>>(
&aggregate_values));
auto predicate = node->GetPredicate();
if (nullptr != predicate &&
(predicate->Evaluate(delegate_tuple, aggref_tuple.get(), econtext))
.IsFalse()) {
return true; // Qual fails, do nothing
}
/*
* 3) Construct the tuple to insert using projectInfo
*/
node->GetProjectInfo()->Evaluate(tuple.get(), delegate_tuple,
aggref_tuple.get(), econtext);
LOG_TRACE("Tuple to Output :");
LOG_TRACE("GROUP TUPLE :: %s", tuple->GetInfo().c_str());
// IMPORTANT: The output table *has* to set the tuple as active.
// Otherwise the LogicalTileWrapper will think that it has no tuples.
// Note that only TempTable does this. DataTable does not.
auto location = output_table->InsertTuple(tuple.get());
if (location.block == INVALID_OID) {
LOG_ERROR("Failed to insert tuple ");
return false;
}
return true;
}
/*
* Helper method responsible for inserting the results of the aggregation
* into a new tuple in the output tile group as well as passing through any
* additional columns from the input tile group.
*
* Output tuple is projected from two tuples:
* Left is the 'delegate' tuple, which is usually the first tuple in the group,
* used to retrieve pass-through values;
* Right is the tuple holding all aggregated values.
*/
bool Helper(const planner::AggregatePlan *node, Agg **aggregates,
storage::DataTable *output_table,
const AbstractTuple *delegate_tuple,
executor::ExecutorContext *econtext) {
auto schema = output_table->GetSchema();
std::unique_ptr<storage::Tuple> tuple(new storage::Tuple(schema, true));
/*
* 1) Construct a vector of aggregated values
*/
std::vector<common::Value> aggregate_values;
auto &aggregate_terms = node->GetUniqueAggTerms();
for (oid_t column_itr = 0; column_itr < aggregate_terms.size();
column_itr++) {
if (aggregates[column_itr] != nullptr) {
common::Value final_val = aggregates[column_itr]->Finalize();
aggregate_values.push_back(final_val);
}
}
/*
* 2) Evaluate filter predicate;
* if fail, just return
*/
std::unique_ptr<expression::ContainerTuple<std::vector<common::Value>>> aggref_tuple(
new expression::ContainerTuple<std::vector<common::Value>>(&aggregate_values));
auto predicate = node->GetPredicate();
if (nullptr != predicate &&
(predicate->Evaluate(delegate_tuple, aggref_tuple.get(), econtext)).IsFalse()) {
return true; // Qual fails, do nothing
}
/*
* 3) Construct the tuple to insert using projectInfo
*/
node->GetProjectInfo()->Evaluate(tuple.get(), delegate_tuple,
aggref_tuple.get(), econtext);
LOG_TRACE("Tuple to Output :");
LOG_TRACE("GROUP TUPLE :: %s", tuple->GetInfo().c_str());
auto location = output_table->InsertTuple(tuple.get());
if (location.block == INVALID_OID) {
LOG_ERROR("Failed to insert tuple ");
return false;
} else {
auto &manager = catalog::Manager::GetInstance();
auto tile_group_header = manager.GetTileGroup(location.block)->GetHeader();
tile_group_header->SetTransactionId(location.offset, INITIAL_TXN_ID);
}
return true;
}
