67 lines
1.6 KiB
C++
67 lines
1.6 KiB
C++
/*
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----
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This file is part of SECONDO.
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Copyright (C) 2004, University in Hagen, Department of Computer Science,
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Database Systems for New Applications.
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SECONDO is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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SECONDO is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with SECONDO; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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----
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December 07, 2017
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Author: Nicolas Napp
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\tableofcontents
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*/
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#ifndef CCPARTHASHJOIN_H_
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#define CCPARTHASHJOIN_H_
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#include "Operator.h"
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/*
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1 Operator ~ccPartHashJoin~
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The ~ccPartHashJoin~ operator is a cache-conscious equi-join operator, which performs a partitioned hash join on two streams of tuple blocks. As arguments, it expects two streams of tuple blocks and the name of the join attribute for each argument relation. The operator is part of SECONDO's CRel-Algebra.
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*/
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namespace CRel2Algebra {
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class ccPartHashJoin: public Operator
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{
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public:
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// constructor
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ccPartHashJoin();
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// destructor
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virtual ~ccPartHashJoin();
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private:
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class Info;
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static ListExpr TypeMapping(ListExpr args);
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static ValueMapping valueMappings[];
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static int SelectValueMapping(ListExpr args);
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};
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} /* namespace CRel2Algebra */
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#endif /* CCPARTHASHJOIN_H_ */
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