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[GLUTEN-8080][CH]Support function transform_keys/transform_values (#8085
) * support function transfrom_keys/transform_values * fix velox failed ut * revert all files * support transform_keys/values * add uts
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cpp-ch/local-engine/Parser/scalar_function_parser/mapHighOrderFunctions.cpp
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/* | ||
* Licensed to the Apache Software Foundation (ASF) under one or more | ||
* contributor license agreements. See the NOTICE file distributed with | ||
* this work for additional information 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 | ||
* | ||
* http://www.apache.org/licenses/LICENSE-2.0 | ||
* | ||
* Unless required by applicable law or agreed to in writing, software | ||
* distributed under the License is distributed on an "AS IS" BASIS, | ||
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
* See the License for the specific language governing permissions and | ||
* limitations under the License. | ||
*/ | ||
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#include <DataTypes/DataTypeArray.h> | ||
#include <DataTypes/DataTypeFunction.h> | ||
#include <DataTypes/DataTypeNullable.h> | ||
#include <Parser/FunctionParser.h> | ||
#include <Parser/TypeParser.h> | ||
#include <Parser/scalar_function_parser/lambdaFunction.h> | ||
#include <Common/BlockTypeUtils.h> | ||
#include <Common/CHUtil.h> | ||
#include <Common/Exception.h> | ||
#include <Common/logger_useful.h> | ||
#include "DataTypes/DataTypeMap.h" | ||
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namespace DB::ErrorCodes | ||
{ | ||
extern const int SIZES_OF_COLUMNS_DOESNT_MATCH; | ||
extern const int BAD_ARGUMENTS; | ||
} | ||
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namespace local_engine | ||
{ | ||
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template <bool transform_keys = true> | ||
class FunctionParserMapTransformImpl : public FunctionParser | ||
{ | ||
public: | ||
static constexpr auto name = transform_keys ? "transform_keys" : "transform_values"; | ||
String getName() const override { return name; } | ||
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explicit FunctionParserMapTransformImpl(ParserContextPtr parser_context_) : FunctionParser(parser_context_) {} | ||
~FunctionParserMapTransformImpl() override = default; | ||
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const DB::ActionsDAG::Node * | ||
parse(const substrait::Expression_ScalarFunction & substrait_func, DB::ActionsDAG & actions_dag) const override | ||
{ | ||
/// Parse spark transform_keys(map, func) as CH mapFromArrays(arrayMap(func, cast(map as array)), mapValues(map)) | ||
/// Parse spark transform_values(map, func) as CH mapFromArrays(mapKeys(map), arrayMap(func, cast(map as array))) | ||
auto parsed_args = parseFunctionArguments(substrait_func, actions_dag); | ||
if (parsed_args.size() != 2) | ||
throw DB::Exception(DB::ErrorCodes::SIZES_OF_COLUMNS_DOESNT_MATCH, "{} function must have three arguments", getName()); | ||
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auto lambda_args = collectLambdaArguments(parser_context, substrait_func.arguments()[1].value().scalar_function()); | ||
if (lambda_args.size() != 2) | ||
throw DB::Exception( | ||
DB::ErrorCodes::SIZES_OF_COLUMNS_DOESNT_MATCH, "The lambda function in {} must have two arguments", getName()); | ||
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const auto * map_node = parsed_args[0]; | ||
const auto * func_node = parsed_args[1]; | ||
const auto & map_type = map_node->result_type; | ||
auto array_type = checkAndGetDataType<DataTypeMap>(removeNullable(map_type).get())->getNestedType(); | ||
if (map_type->isNullable()) | ||
array_type = std::make_shared<DataTypeNullable>(array_type); | ||
const auto * array_node = ActionsDAGUtil::convertNodeTypeIfNeeded(actions_dag, map_node, array_type); | ||
const auto * transformed_node = toFunctionNode(actions_dag, "arrayMap", {func_node, array_node}); | ||
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const DB::ActionsDAG::Node * result_node = nullptr; | ||
if constexpr (transform_keys) | ||
{ | ||
const auto * nontransformed_node = toFunctionNode(actions_dag, "mapValues", {parsed_args[0]}); | ||
result_node = toFunctionNode(actions_dag, "mapFromArrays", {transformed_node, nontransformed_node}); | ||
} | ||
else | ||
{ | ||
const auto * nontransformed_node = toFunctionNode(actions_dag, "mapKeys", {parsed_args[0]}); | ||
result_node = toFunctionNode(actions_dag, "mapFromArrays", {nontransformed_node, transformed_node}); | ||
} | ||
return convertNodeTypeIfNeeded(substrait_func, result_node, actions_dag); | ||
} | ||
}; | ||
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using FunctionParserTransformKeys = FunctionParserMapTransformImpl<true>; | ||
using FunctionParserTransformValues = FunctionParserMapTransformImpl<false>; | ||
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static FunctionParserRegister<FunctionParserTransformKeys> register_transform_keys; | ||
static FunctionParserRegister<FunctionParserTransformValues> register_transform_values; | ||
} |
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