145 lines
4.9 KiB
C++
145 lines
4.9 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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#include "vec/exprs/vcase_expr.h"
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#include <gen_cpp/Exprs_types.h>
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#include <gen_cpp/Types_types.h>
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#include <stddef.h>
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#include <algorithm>
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#include <memory>
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#include <ostream>
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#include <vector>
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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/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/columns_with_type_and_name.h"
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#include "vec/exprs/vexpr_context.h"
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#include "vec/functions/simple_function_factory.h"
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namespace doris {
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class RowDescriptor;
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class RuntimeState;
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} // namespace doris
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namespace doris::vectorized {
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VCaseExpr::VCaseExpr(const TExprNode& node)
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: VExpr(node),
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_has_case_expr(node.case_expr.has_case_expr),
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_has_else_expr(node.case_expr.has_else_expr) {
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if (_has_case_expr) {
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_function_name += "_has_case";
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}
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if (_has_else_expr) {
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_function_name += "_has_else";
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}
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}
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Status VCaseExpr::prepare(RuntimeState* state, const RowDescriptor& desc, VExprContext* context) {
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RETURN_IF_ERROR_OR_PREPARED(VExpr::prepare(state, desc, context));
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ColumnsWithTypeAndName argument_template;
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DataTypes arguments;
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for (int i = 0; i < _children.size(); i++) {
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auto child = _children[i];
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argument_template.emplace_back(nullptr, child->data_type(), child->expr_name());
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arguments.emplace_back(child->data_type());
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}
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_function = SimpleFunctionFactory::instance().get_function(_function_name, argument_template,
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_data_type);
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if (_function == nullptr) {
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return Status::NotSupported("vcase_expr Function {} is not implemented",
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_fn.name.function_name);
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}
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VExpr::register_function_context(state, context);
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_prepare_finished = true;
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return Status::OK();
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}
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Status VCaseExpr::open(RuntimeState* state, VExprContext* context,
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FunctionContext::FunctionStateScope scope) {
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DCHECK(_prepare_finished);
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for (auto& i : _children) {
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RETURN_IF_ERROR(i->open(state, context, scope));
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}
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RETURN_IF_ERROR(VExpr::init_function_context(context, scope, _function));
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if (scope == FunctionContext::FRAGMENT_LOCAL) {
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RETURN_IF_ERROR(VExpr::get_const_col(context, nullptr));
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}
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_open_finished = true;
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return Status::OK();
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}
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void VCaseExpr::close(VExprContext* context, FunctionContext::FunctionStateScope scope) {
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DCHECK(_prepare_finished);
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VExpr::close_function_context(context, scope, _function);
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VExpr::close(context, scope);
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}
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Status VCaseExpr::execute(VExprContext* context, Block* block, int* result_column_id) {
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if (is_const_and_have_executed()) { // const have execute in open function
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return get_result_from_const(block, _expr_name, result_column_id);
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}
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DCHECK(_open_finished || _getting_const_col);
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ColumnNumbers arguments(_children.size());
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for (int i = 0; i < _children.size(); i++) {
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int column_id = -1;
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RETURN_IF_ERROR(_children[i]->execute(context, block, &column_id));
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arguments[i] = column_id;
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}
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RETURN_IF_ERROR(check_constant(*block, arguments));
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size_t num_columns_without_result = block->columns();
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block->insert({nullptr, _data_type, _expr_name});
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RETURN_IF_ERROR(_function->execute(context->fn_context(_fn_context_index), *block, arguments,
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num_columns_without_result, block->rows(), false));
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*result_column_id = num_columns_without_result;
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return Status::OK();
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}
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const std::string& VCaseExpr::expr_name() const {
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return _expr_name;
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}
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std::string VCaseExpr::debug_string() const {
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std::stringstream out;
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out << "CaseExpr(has_case_expr=" << _has_case_expr << " has_else_expr=" << _has_else_expr
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<< " function=" << _function_name << "){";
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bool first = true;
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for (auto& input_expr : children()) {
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if (first) {
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first = false;
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} else {
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out << ",";
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}
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out << input_expr->debug_string();
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}
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out << "}";
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return out.str();
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}
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} // namespace doris::vectorized
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