OmniSciDB  2e3a973ef4
RexSubQueryIdCollector.h
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1 /*
2  * Copyright 2020 OmniSci, Inc.
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 /*
18  * @description RexSubQueryIdCollector is a visitor class that collects all
19  * RexSubQuery::getId() values for all RexSubQuery nodes. This uses sorted arrays of
20  * (hash_code, handler) pairs for tree navigation.
21  */
22 
23 #pragma once
24 
25 #include "RelRexDagVisitor.h"
26 
27 #include <unordered_set>
28 
30  public:
32 
33  using Ids = std::unordered_set<unsigned>;
34  static Ids getLiveRexSubQueryIds(RelAlgNode const*);
35 
36  private:
37  void visit(RexSubQuery const*) override;
38 
40 };
void visit(RelAlgNode const *)
static Ids getLiveRexSubQueryIds(RelAlgNode const *)
std::unordered_set< unsigned > Ids
void visit(RexSubQuery const *) override