139 lines
3.2 KiB
C++
139 lines
3.2 KiB
C++
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/*
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----
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This file is part of SECONDO.
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Copyright (C) 2015,
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Faculty of Mathematics and 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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//[$][\$]
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1 Implementation of the type operator DRELFUNARGx
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*/
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#include "NestedList.h"
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#include "ListUtils.h"
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#include "QueryProcessor.h"
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#include "StandardTypes.h"
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#include "Algebras/Distributed2/frel.h"
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#include "Algebras/Distributed2/fsrel.h"
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#include "DRel.h"
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extern NestedList* nl;
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extern QueryProcessor* qp;
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namespace distributed2 {
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template<int pos, bool makeFS>
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ListExpr ARRAYFUNARG( ListExpr args );
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}
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using namespace distributed2;
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namespace drel {
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/*
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1.1 Type Mapping
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*/
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template<bool rel, int pos>
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ListExpr DRELFUNARG( ListExpr args ) {
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if( !nl->HasMinLength( args, pos ) ) {
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return listutils::typeError( "too less arguments" );
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}
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for( int i = 1; i < pos; i++ ) {
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args = nl->Rest( args );
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}
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ListExpr arg = nl->First( args );
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if( DRel::checkType( arg )
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|| DFRel::checkType( arg ) ) {
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if( rel ) {
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return nl->Second( arg );
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}
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else {
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return nl->Second( nl->Second( arg ) );
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}
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}
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return listutils::typeError( "Invalid type found" );
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}
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/*
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1.2 Specifications of type map operators.
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*/
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OperatorSpec DRELFUNARG1SPEC(
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"d[f]rel(rel(X)) x ... -> X",
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"DRELFUNARG1(_)",
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"Type mapping operator.",
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"query drel1 drelfilter[.PLZ=99998] drelsummarize consume"
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);
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OperatorSpec DRELFUNARG2SPEC(
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"d[f]rel(rel(X)) x ... -> X",
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"DRELFUNARG2(_)",
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"Type mapping operator.",
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"query drel1 drelprojectextend[PLZ; PLZ2 : .PLZ + 2] drelsummarize"
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"consume"
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);
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OperatorSpec DRELRELFUNARG1SPEC(
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"d[f]rel(rel(X)) x ... -> rel(X)",
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"DRELRELFUNARG1(_)",
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"Type mapping operator.",
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"query drel1 drellgroupby[PLZ; Anz: group feed count] drelsummarize "
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"consume"
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);
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/*
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1.3 Operator instance of the type map operators.
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*/
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Operator DRELFUNARG1OP(
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"DRELFUNARG1",
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DRELFUNARG1SPEC.getStr( ),
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0,
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Operator::SimpleSelect,
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DRELFUNARG<false, 1>
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);
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Operator DRELFUNARG2OP(
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"DRELFUNARG2",
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DRELFUNARG2SPEC.getStr( ),
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0,
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Operator::SimpleSelect,
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DRELFUNARG<false, 2>
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);
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Operator DRELRELFUNARG1OP(
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"DRELRELFUNARG1",
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DRELRELFUNARG1SPEC.getStr( ),
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0,
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Operator::SimpleSelect,
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DRELFUNARG<true, 1>
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);
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} // end of namespace drel
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