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8255566f9d
dblink now has its own validator function dblink_fdw_validator(), which is better than the core function postgresql_fdw_validator() because it gets the list of legal options from libpq instead of having a hard-wired list. Make the dblink extension module provide a standard foreign data wrapper dblink_fdw that encapsulates use of this validator, and recommend use of that wrapper instead of making up wrappers on the fly. Unfortunately, because ad-hoc wrappers *were* recommended practice previously, it's not clear when we can get rid of postgresql_fdw_validator without causing upgrade problems. But this is a step in the right direction. Shigeru Hanada, reviewed by KaiGai Kohei
64 lines
2.4 KiB
C
64 lines
2.4 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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* Joe Conway <mail@joeconway.com>
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* And contributors:
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* Darko Prenosil <Darko.Prenosil@finteh.hr>
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* Shridhar Daithankar <shridhar_daithankar@persistent.co.in>
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*
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* contrib/dblink/dblink.h
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* Copyright (c) 2001-2012, PostgreSQL Global Development Group
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* ALL RIGHTS RESERVED;
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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 "fmgr.h"
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/*
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* External declarations
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*/
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extern Datum dblink_connect(PG_FUNCTION_ARGS);
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extern Datum dblink_disconnect(PG_FUNCTION_ARGS);
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extern Datum dblink_open(PG_FUNCTION_ARGS);
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extern Datum dblink_close(PG_FUNCTION_ARGS);
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extern Datum dblink_fetch(PG_FUNCTION_ARGS);
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extern Datum dblink_record(PG_FUNCTION_ARGS);
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extern Datum dblink_send_query(PG_FUNCTION_ARGS);
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extern Datum dblink_get_result(PG_FUNCTION_ARGS);
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extern Datum dblink_get_connections(PG_FUNCTION_ARGS);
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extern Datum dblink_is_busy(PG_FUNCTION_ARGS);
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extern Datum dblink_cancel_query(PG_FUNCTION_ARGS);
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extern Datum dblink_error_message(PG_FUNCTION_ARGS);
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extern Datum dblink_exec(PG_FUNCTION_ARGS);
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extern Datum dblink_get_pkey(PG_FUNCTION_ARGS);
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extern Datum dblink_build_sql_insert(PG_FUNCTION_ARGS);
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extern Datum dblink_build_sql_delete(PG_FUNCTION_ARGS);
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extern Datum dblink_build_sql_update(PG_FUNCTION_ARGS);
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extern Datum dblink_current_query(PG_FUNCTION_ARGS);
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extern Datum dblink_get_notify(PG_FUNCTION_ARGS);
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extern Datum dblink_fdw_validator(PG_FUNCTION_ARGS);
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#endif /* DBLINK_H */
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