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EquiJoinCondition.h
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1 /*
2  * Copyright 2017 MapD Technologies, 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 #ifndef QUERYENGINE_EQUIJOINCONDITION_H
17 #define QUERYENGINE_EQUIJOINCONDITION_H
18 
19 #include <list>
20 #include <memory>
21 
22 namespace Analyzer {
23 class BinOper;
24 class Expr;
25 } // namespace Analyzer
26 
27 // Go through the qualifiers and group consecutive equality operators to create
28 // a list of composite join conditions.
29 std::list<std::shared_ptr<Analyzer::Expr>> combine_equi_join_conditions(
30  const std::list<std::shared_ptr<Analyzer::Expr>>& join_quals);
31 
32 std::list<std::shared_ptr<Analyzer::Expr>> coalesce_singleton_equi_join(
33  const std::shared_ptr<Analyzer::BinOper>& join_qual);
34 
35 #endif // QUERYENGINE_EQUIJOINCONDITION_H
std::list< std::shared_ptr< Analyzer::Expr > > coalesce_singleton_equi_join(const std::shared_ptr< Analyzer::BinOper > &join_qual)
std::list< std::shared_ptr< Analyzer::Expr > > combine_equi_join_conditions(const std::list< std::shared_ptr< Analyzer::Expr >> &join_quals)