98 lines
4.1 KiB
C++
98 lines
4.1 KiB
C++
// 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.
|
|
|
|
#include "vec/exprs/vcast_expr.h"
|
|
|
|
#include <string_view>
|
|
|
|
#include "common/status.h"
|
|
#include "vec/core/field.h"
|
|
#include "vec/data_types/data_type_factory.hpp"
|
|
#include "vec/exprs/vexpr.h"
|
|
#include "vec/functions/simple_function_factory.h"
|
|
|
|
namespace doris::vectorized {
|
|
|
|
doris::Status VCastExpr::prepare(doris::RuntimeState* state, const doris::RowDescriptor& desc,
|
|
VExprContext* context) {
|
|
RETURN_IF_ERROR(VExpr::prepare(state, desc, context));
|
|
|
|
DCHECK_EQ(_children.size(), 1);
|
|
auto child = _children[0];
|
|
const auto& child_name = child->expr_name();
|
|
auto child_column = child->data_type()->create_column();
|
|
|
|
// create a const string column
|
|
_target_data_type = _data_type;
|
|
_target_data_type_name = DataTypeFactory::instance().get(_target_data_type);
|
|
_cast_param_data_type = std::make_shared<DataTypeString>();
|
|
_cast_param = _cast_param_data_type->create_column_const(1, _target_data_type_name);
|
|
|
|
ColumnsWithTypeAndName argument_template;
|
|
argument_template.reserve(2);
|
|
argument_template.emplace_back(std::move(child_column), child->data_type(), child_name);
|
|
argument_template.emplace_back(_cast_param, _cast_param_data_type, _target_data_type_name);
|
|
|
|
_function = SimpleFunctionFactory::instance().get_function(function_name, argument_template,
|
|
_data_type);
|
|
|
|
if (_function == nullptr) {
|
|
return Status::NotSupported(
|
|
fmt::format("Function {} is not implemented", _fn.name.function_name));
|
|
}
|
|
VExpr::register_function_context(state, context);
|
|
_expr_name = fmt::format("(CAST {}, TO {})", child_name, _target_data_type_name);
|
|
return Status::OK();
|
|
}
|
|
|
|
doris::Status VCastExpr::open(doris::RuntimeState* state, VExprContext* context,
|
|
FunctionContext::FunctionStateScope scope) {
|
|
RETURN_IF_ERROR(VExpr::open(state, context, scope));
|
|
RETURN_IF_ERROR(VExpr::init_function_context(context, scope, _function));
|
|
return Status::OK();
|
|
}
|
|
|
|
void VCastExpr::close(doris::RuntimeState* state, VExprContext* context,
|
|
FunctionContext::FunctionStateScope scope) {
|
|
VExpr::close_function_context(context, scope, _function);
|
|
VExpr::close(state, context, scope);
|
|
}
|
|
|
|
doris::Status VCastExpr::execute(VExprContext* context, doris::vectorized::Block* block,
|
|
int* result_column_id) {
|
|
// for each child call execute
|
|
int column_id = 0;
|
|
_children[0]->execute(context, block, &column_id);
|
|
|
|
size_t const_param_id = VExpr::insert_param(
|
|
block, {_cast_param, _cast_param_data_type, _target_data_type_name}, block->rows());
|
|
|
|
// call function
|
|
size_t num_columns_without_result = block->columns();
|
|
// prepare a column to save result
|
|
block->insert({nullptr, _data_type, _expr_name});
|
|
RETURN_IF_ERROR(_function->execute(context->fn_context(_fn_context_index), *block,
|
|
{static_cast<size_t>(column_id), const_param_id},
|
|
num_columns_without_result, block->rows(), false));
|
|
*result_column_id = num_columns_without_result;
|
|
return Status::OK();
|
|
}
|
|
|
|
const std::string& VCastExpr::expr_name() const {
|
|
return _expr_name;
|
|
}
|
|
} // namespace doris::vectorized
|