177 lines
9.0 KiB
C++
177 lines
9.0 KiB
C++
// Licensed to the Apache Software Foundation (ASF) under one
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// or more contributor license agreements. See the NOTICE file
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// distributed with this work for additional information
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// regarding copyright ownership. The ASF licenses this file
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// to you under the Apache License, Version 2.0 (the
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// "License"); you may not use this file except in compliance
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// with the License. You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing,
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// software distributed under the License is distributed on an
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// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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// KIND, either express or implied. See the License for the
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// specific language governing permissions and limitations
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// under the License.
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// This file is copied from
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// https://github.com/ClickHouse/ClickHouse/blob/master/src/Processors/Transforms/WindowTransform.cpp
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// and modified by Doris
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#include "vec/aggregate_functions/aggregate_function_window.h"
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#include "common/logging.h"
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#include "vec/aggregate_functions/aggregate_function_simple_factory.h"
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#include "vec/aggregate_functions/factory_helpers.h"
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#include "vec/aggregate_functions/helpers.h"
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namespace doris::vectorized {
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AggregateFunctionPtr create_aggregate_function_dense_rank(const std::string& name,
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const DataTypes& argument_types,
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const Array& parameters,
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const bool result_is_nullable) {
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assert_no_parameters(name, parameters);
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return std::make_shared<WindowFunctionDenseRank>(argument_types);
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}
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AggregateFunctionPtr create_aggregate_function_rank(const std::string& name,
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const DataTypes& argument_types,
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const Array& parameters,
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const bool result_is_nullable) {
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assert_no_parameters(name, parameters);
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return std::make_shared<WindowFunctionRank>(argument_types);
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}
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AggregateFunctionPtr create_aggregate_function_row_number(const std::string& name,
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const DataTypes& argument_types,
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const Array& parameters,
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const bool result_is_nullable) {
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assert_no_parameters(name, parameters);
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return std::make_shared<WindowFunctionRowNumber>(argument_types);
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}
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template <template <typename> class AggregateFunctionTemplate, template <typename> class Data,
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bool is_nullable, bool is_copy = false>
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static IAggregateFunction* create_function_single_value(const String& name,
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const DataTypes& argument_types,
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const Array& parameters) {
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using StoreType = std::conditional_t<is_copy, CopiedValue, Value>;
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assert_arity_at_most<3>(name, argument_types);
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auto type = argument_types[0].get();
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if (type->is_nullable()) {
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type = assert_cast<const DataTypeNullable*>(type)->get_nested_type().get();
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}
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WhichDataType which(*type);
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#define DISPATCH(TYPE) \
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if (which.idx == TypeIndex::TYPE) \
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return new AggregateFunctionTemplate< \
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Data<LeadAndLagData<TYPE, is_nullable, false, StoreType>>>(argument_types);
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FOR_NUMERIC_TYPES(DISPATCH)
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#undef DISPATCH
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if (which.is_decimal()) {
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return new AggregateFunctionTemplate<
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Data<LeadAndLagData<Int128, is_nullable, false, StoreType>>>(argument_types);
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}
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if (which.is_date_or_datetime()) {
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return new AggregateFunctionTemplate<
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Data<LeadAndLagData<Int64, is_nullable, false, StoreType>>>(argument_types);
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}
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if (which.is_string_or_fixed_string()) {
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return new AggregateFunctionTemplate<
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Data<LeadAndLagData<StringRef, is_nullable, true, StoreType>>>(argument_types);
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}
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DCHECK(false) << "with unknowed type, failed in create_aggregate_function_leadlag";
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return nullptr;
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}
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template <bool is_nullable>
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AggregateFunctionPtr create_aggregate_function_lag(const std::string& name,
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const DataTypes& argument_types,
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const Array& parameters,
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const bool result_is_nullable) {
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return AggregateFunctionPtr(
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create_function_single_value<WindowFunctionData, WindowFunctionLagData, is_nullable>(
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name, argument_types, parameters));
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}
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template <bool is_nullable>
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AggregateFunctionPtr create_aggregate_function_lead(const std::string& name,
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const DataTypes& argument_types,
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const Array& parameters,
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const bool result_is_nullable) {
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return AggregateFunctionPtr(
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create_function_single_value<WindowFunctionData, WindowFunctionLeadData, is_nullable>(
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name, argument_types, parameters));
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}
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template <bool is_nullable>
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AggregateFunctionPtr create_aggregate_function_first(const std::string& name,
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const DataTypes& argument_types,
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const Array& parameters,
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const bool result_is_nullable) {
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return AggregateFunctionPtr(
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create_function_single_value<WindowFunctionData, WindowFunctionFirstData, is_nullable>(
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name, argument_types, parameters));
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}
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template <bool is_nullable>
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AggregateFunctionPtr create_aggregate_function_last(const std::string& name,
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const DataTypes& argument_types,
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const Array& parameters,
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const bool result_is_nullable) {
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return AggregateFunctionPtr(
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create_function_single_value<WindowFunctionData, WindowFunctionLastData, is_nullable>(
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name, argument_types, parameters));
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}
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AggregateFunctionPtr create_aggregate_function_replace_if_not_null(const std::string& name,
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const DataTypes& argument_types,
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const Array& parameters,
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const bool result_is_nullable) {
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return AggregateFunctionPtr(
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create_function_single_value<WindowFunctionData, WindowFunctionFirstData, false, true>(
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name, argument_types, parameters));
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}
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AggregateFunctionPtr create_aggregate_function_replace(const std::string& name,
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const DataTypes& argument_types,
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const Array& parameters,
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const bool result_is_nullable) {
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return AggregateFunctionPtr(
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create_function_single_value<WindowFunctionData, WindowFunctionFirstData, false, true>(
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name, argument_types, parameters));
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}
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AggregateFunctionPtr create_aggregate_function_replace_nullable(const std::string& name,
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const DataTypes& argument_types,
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const Array& parameters,
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const bool result_is_nullable) {
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return AggregateFunctionPtr(
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create_function_single_value<WindowFunctionData, WindowFunctionFirstData, true, true>(
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name, argument_types, parameters));
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}
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void register_aggregate_function_window_rank(AggregateFunctionSimpleFactory& factory) {
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factory.register_function("dense_rank", create_aggregate_function_dense_rank);
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factory.register_function("rank", create_aggregate_function_rank);
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factory.register_function("row_number", create_aggregate_function_row_number);
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}
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void register_aggregate_function_window_lead_lag(AggregateFunctionSimpleFactory& factory) {
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factory.register_function("lead", create_aggregate_function_lead<false>);
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factory.register_function("lead", create_aggregate_function_lead<true>, true);
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factory.register_function("lag", create_aggregate_function_lag<false>);
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factory.register_function("lag", create_aggregate_function_lag<true>, true);
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factory.register_function("first_value", create_aggregate_function_first<false>);
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factory.register_function("first_value", create_aggregate_function_first<true>, true);
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factory.register_function("last_value", create_aggregate_function_last<false>);
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factory.register_function("last_value", create_aggregate_function_last<true>, true);
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}
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} // namespace doris::vectorized
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