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* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
* Unless required by applicable law or agreed to in writing,
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#include "expressions/window_aggregation/WindowAggregateFunctionCount.hpp"
#include <memory>
#include <vector>
#include "expressions/window_aggregation/WindowAggregationHandle.hpp"
#include "types/Type.hpp"
#include "types/TypeFactory.hpp"
#include "types/TypeID.hpp"
#include "glog/logging.h"
namespace quickstep {
bool WindowAggregateFunctionCount::canApplyToTypes(
const std::vector<const Type*> &argument_types) const {
// COUNT may be nullary (i.e. COUNT(*)) or unary.
return argument_types.size() <= 1;
const Type* WindowAggregateFunctionCount::resultTypeForArgumentTypes(
const std::vector<const Type*> &argument_types) const {
if (!canApplyToTypes(argument_types)) {
return nullptr;
return &TypeFactory::GetType(kLong);
WindowAggregationHandle* WindowAggregateFunctionCount::createHandle(
const std::vector<const Type*> &argument_types,
const std::vector<std::unique_ptr<const Scalar>> &partition_by_attributes,
const std::vector<std::unique_ptr<const Scalar>> &order_by_attributes,
const bool is_row,
const std::int64_t num_preceding,
const std::int64_t num_following) const {
<< "Attempted to create a WindowAggregationHandleCount for argument Types "
<< "that COUNT can not be applied to (> 1 argument).";
// TODO(Shixuan): Add handle for Count.
return nullptr;
} // namespace quickstep