98 lines
3.7 KiB
C++
98 lines
3.7 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/Functions/IsNotNull.cpp
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// and modified by Doris
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#include <stddef.h>
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#include <algorithm>
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#include <boost/iterator/iterator_facade.hpp>
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#include <memory>
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#include <string>
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#include <utility>
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#include "common/status.h"
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#include "vec/aggregate_functions/aggregate_function.h"
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#include "vec/columns/column.h"
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#include "vec/columns/column_nullable.h"
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#include "vec/columns/column_vector.h"
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#include "vec/columns/columns_number.h"
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#include "vec/common/assert_cast.h"
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#include "vec/core/block.h"
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#include "vec/core/column_numbers.h"
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#include "vec/core/column_with_type_and_name.h"
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#include "vec/core/field.h"
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#include "vec/data_types/data_type_number.h"
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#include "vec/functions/function.h"
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#include "vec/functions/simple_function_factory.h"
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namespace doris {
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class FunctionContext;
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} // namespace doris
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namespace doris::vectorized {
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/// Implements the function isNotNull which returns true if a value
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/// is not null, false otherwise.
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class FunctionIsNotNull : public IFunction {
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public:
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static constexpr auto name = "is_not_null_pred";
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static FunctionPtr create() { return std::make_shared<FunctionIsNotNull>(); }
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std::string get_name() const override { return name; }
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size_t get_number_of_arguments() const override { return 1; }
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bool use_default_implementation_for_nulls() const override { return false; }
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ColumnNumbers get_arguments_that_dont_imply_nullable_return_type(
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size_t /*number_of_arguments*/) const override {
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return {0};
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}
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DataTypePtr get_return_type_impl(const DataTypes&) const override {
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return std::make_shared<DataTypeUInt8>();
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}
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Status execute_impl(FunctionContext* context, Block& block, const ColumnNumbers& arguments,
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size_t result, size_t input_rows_count) override {
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const ColumnWithTypeAndName& elem = block.get_by_position(arguments[0]);
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if (auto* nullable = check_and_get_column<ColumnNullable>(*elem.column)) {
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/// Return the negated null map.
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auto res_column = ColumnUInt8::create(input_rows_count);
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const auto* __restrict src_data = nullable->get_null_map_data().data();
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auto* __restrict res_data = assert_cast<ColumnUInt8&>(*res_column).get_data().data();
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for (size_t i = 0; i < input_rows_count; ++i) {
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res_data[i] = !src_data[i];
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}
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block.replace_by_position(result, std::move(res_column));
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} else {
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/// Since no element is nullable, return a constant one.
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block.get_by_position(result).column =
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DataTypeUInt8().create_column_const(elem.column->size(), 1u);
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}
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return Status::OK();
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}
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};
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void register_function_is_not_null(SimpleFunctionFactory& factory) {
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factory.register_function<FunctionIsNotNull>();
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}
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} // namespace doris::vectorized
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