31a4f96f01
The close method does nothing. But I am not sure we could remove it. So that I add it to dector method and remove many many calls.
71 lines
2.5 KiB
C++
71 lines
2.5 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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#pragma once
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#include <gen_cpp/Exprs_types.h>
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#include <stdint.h>
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#include <string>
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#include "common/object_pool.h"
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#include "common/status.h"
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#include "udf/udf.h"
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#include "vec/exprs/vexpr.h"
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namespace doris {
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class RowDescriptor;
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class RuntimeState;
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namespace vectorized {
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class Block;
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} // namespace vectorized
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} // namespace doris
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namespace doris::vectorized {
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// Sepecial type of expression which only acts on dynmiac column(ColumnObject)
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// it sends schema change rpc to Frontend to add new generately columns
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// from it's type and name.It contains an inner slot which indicated it's variant
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// column.
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class VSchemaChangeExpr : public VExpr {
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ENABLE_FACTORY_CREATOR(VSchemaChangeExpr);
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public:
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VSchemaChangeExpr(const TExprNode& node) : VExpr(node), _tnode(node) {}
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~VSchemaChangeExpr() = default;
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Status execute(VExprContext* context, doris::vectorized::Block* block,
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int* result_column_id) override;
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Status prepare(doris::RuntimeState* state, const doris::RowDescriptor& desc,
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VExprContext* context) override;
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Status open(doris::RuntimeState* state, VExprContext* context,
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FunctionContext::FunctionStateScope scope) override;
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void close(VExprContext* context, FunctionContext::FunctionStateScope scope) override;
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VExprSPtr clone() const override { return VSchemaChangeExpr::create_shared(*this); }
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const std::string& expr_name() const override;
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std::string debug_string() const override;
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private:
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std::string _expr_name;
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int32_t _table_id;
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int _slot_id;
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int _column_id;
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TExprNode _tnode;
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static const constexpr char* function_name = "SCHMA_CHANGE";
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};
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} // namespace doris::vectorized
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