111 lines
3.9 KiB
C++
111 lines
3.9 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 "vec/columns/column_nullable.h"
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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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_is_prepare(false),
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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(doris::RuntimeState* state, const doris::RowDescriptor& desc,
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VExprContext* context) {
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RETURN_IF_ERROR(VExpr::prepare(state, desc, context));
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if (_is_prepare) {
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return Status::OK();
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}
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_is_prepare = true;
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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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const auto& child_name = child->expr_name();
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auto child_column = child->data_type()->create_column();
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argument_template.emplace_back(std::move(child_column), child->data_type(), child_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(
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fmt::format("vcase_expr Function {} is not implemented", _fn.name.function_name));
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}
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VExpr::register_function_context(state, context);
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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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RETURN_IF_ERROR(VExpr::open(state, context, scope));
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RETURN_IF_ERROR(VExpr::init_function_context(context, scope, _function));
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CaseState* case_state = new CaseState {_data_type};
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context->fn_context(_fn_context_index)->set_function_state(scope, case_state);
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return Status::OK();
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}
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void VCaseExpr::close(RuntimeState* state, VExprContext* context,
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FunctionContext::FunctionStateScope scope) {
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VExpr::close_function_context(context, scope, _function);
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VExpr::close(state, 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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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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_children[i]->execute(context, block, &column_id);
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arguments[i] = column_id;
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block->replace_by_position_if_const(column_id);
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auto child_column = block->get_by_position(column_id).column;
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}
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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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} // namespace doris::vectorized
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