71 lines
1.9 KiB
C
71 lines
1.9 KiB
C
/*
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* dblink.h
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*
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* Functions returning results from a remote database
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*
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* Copyright (c) Joseph Conway <joe.conway@mail.com>, 2001;
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*
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* Permission to use, copy, modify, and distribute this software and its
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* documentation for any purpose, without fee, and without a written agreement
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* is hereby granted, provided that the above copyright notice and this
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* paragraph and the following two paragraphs appear in all copies.
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*
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* IN NO EVENT SHALL THE AUTHOR OR DISTRIBUTORS BE LIABLE TO ANY PARTY FOR
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* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, INCLUDING
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* LOST PROFITS, ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS
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* DOCUMENTATION, EVEN IF THE AUTHOR OR DISTRIBUTORS HAVE BEEN ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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* THE AUTHOR AND DISTRIBUTORS SPECIFICALLY DISCLAIMS ANY WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
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* ON AN "AS IS" BASIS, AND THE AUTHOR AND DISTRIBUTORS HAS NO OBLIGATIONS TO
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* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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*
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*/
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#ifndef DBLINK_H
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#define DBLINK_H
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#include <string.h>
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#include "postgres.h"
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#include "libpq-fe.h"
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#include "libpq-int.h"
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#include "fmgr.h"
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#include "access/tupdesc.h"
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#include "executor/executor.h"
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#include "nodes/nodes.h"
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#include "nodes/execnodes.h"
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#include "utils/builtins.h"
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/*
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* This struct holds the results of the remote query.
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* Use fn_extra to hold a pointer to it across calls
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*/
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typedef struct
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{
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/*
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* last tuple number accessed
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*/
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int tup_num;
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/*
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* the actual query results
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*/
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PGresult *res;
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} dblink_results;
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/*
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* External declarations
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*/
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extern Datum dblink(PG_FUNCTION_ARGS);
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extern Datum dblink_tok(PG_FUNCTION_ARGS);
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/*
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* Internal declarations
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*/
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dblink_results *init_dblink_results(MemoryContext fn_mcxt);
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#endif /* DBLINK_H */
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