69 lines
1.7 KiB
C
69 lines
1.7 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) 2021,
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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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*/
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#ifndef _RESULT_ITERATOR_POSTGRES_H_
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#define _RESULT_ITERATOR_POSTGRES_H_
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#include "ResultIteratorGeneric.h"
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#include <postgres.h>
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#include <libpq-fe.h>
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#include <catalog/pg_type.h>
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namespace BasicEngine {
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class ResultIteratorPostgres : public ResultIteratorGeneric {
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public:
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ResultIteratorPostgres(PGresult* res, ListExpr &type)
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: ResultIteratorGeneric(type), res(res) {
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if(ready) {
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totalTuples = PQntuples(res);
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} else {
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totalTuples = 0;
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}
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}
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virtual ~ResultIteratorPostgres() {
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if(res != nullptr) {
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PQclear(res);
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res = nullptr;
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}
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}
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virtual bool hasNextTuple();
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virtual Tuple* getNextTuple();
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private:
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PGresult* res = nullptr;
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int currentTuple = 0;
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int totalTuples = 0;
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};
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}
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#endif
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