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Added patch by Bernd Helmle <bernd.helmle@credativ.de> that adds a low level

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function that returns the current transaction status.
This commit is contained in:
Michael Meskes 2009-09-18 13:13:32 +00:00
parent 20f7f019f9
commit dacaeff5ae
4 changed files with 46 additions and 5 deletions
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27
doc/src/sgml/ecpg.sgml
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@ -1,4 +1,4 @@
<!-- $PostgreSQL: pgsql/doc/src/sgml/ecpg.sgml,v 1.90 2009/07/11 21:15:32 petere Exp $ -->
<!-- $PostgreSQL: pgsql/doc/src/sgml/ecpg.sgml,v 1.91 2009/09/18 13:13:32 meskes Exp $ -->
<chapter id="ecpg">
<title><application>ECPG</application> - Embedded <acronym>SQL</acronym> in C</title>
@ -4753,6 +4753,31 @@ ECPG = ecpg
</note>
</listitem>
<listitem>
<para>
<function>ECPGget_PGconn(const char *<replaceable>connection_name</replaceable>)
</function> returns the library database connection handle identified by the given name.
If <replaceable>connection_name</replaceable> is set to <literal>NULL</literal>, the current
connection handle is returned. If no connection handle can be identified, the function returns
<literal>NULL</literal>. The returned connection handle can be used to call any other functions
from <application>libpq</application>, if necessary.
</para>
<note>
<para>
It is a bad idea to manipulate database connection handles made from <application>ecpg</application> directly
with <application>libpq</application> routines.
</para>
</note>
</listitem>
<listitem>
<para>
<function>ECPGtransactionStatus(const char *<replaceable>connection_name</replaceable>)</function>
returns the current transaction status of the given connection identified by <replaceable>connection_name</replaceable>.
See <xref linkend="libpq-status"> and libpq's <function>PQtransactionStatus()</function> for details about the returned status codes.
</para>
</listitem>
<listitem>
<para>
<function>ECPGstatus(int <replaceable>lineno</replaceable>,

3
src/interfaces/ecpg/ecpglib/exports.txt
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@ -1,4 +1,4 @@
# $PostgreSQL: pgsql/src/interfaces/ecpg/ecpglib/exports.txt,v 1.5 2008/03/25 12:45:25 meskes Exp $
# $PostgreSQL: pgsql/src/interfaces/ecpg/ecpglib/exports.txt,v 1.6 2009/09/18 13:13:32 meskes Exp $
# Functions to be exported by ecpglib DLL
ECPGallocate_desc 1
ECPGconnect 2
@ -26,3 +26,4 @@ ECPGstatus 23
ECPGtrans 24
sqlprint 25
ECPGget_PGconn 26
ECPGtransactionStatus 27

17
src/interfaces/ecpg/ecpglib/misc.c
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@ -1,4 +1,4 @@
/* $PostgreSQL: pgsql/src/interfaces/ecpg/ecpglib/misc.c,v 1.51 2009/09/03 09:09:01 meskes Exp $ */
/* $PostgreSQL: pgsql/src/interfaces/ecpg/ecpglib/misc.c,v 1.52 2009/09/18 13:13:32 meskes Exp $ */
#define POSTGRES_ECPG_INTERNAL
#include "postgres_fe.h"
@ -170,6 +170,21 @@ ECPGstatus(int lineno, const char *connection_name)
return (true);
}
PGTransactionStatusType
ECPGtransactionStatus(const char *connection_name)
{
const struct connection *con;
con = ecpg_get_connection(connection_name);
if (con == NULL) {
/* transaction status is unknown */
return PQTRANS_UNKNOWN;
}
return PQtransactionStatus(con->connection);
}
bool
ECPGtrans(int lineno, const char *connection_name, const char *transaction)
{

4
src/interfaces/ecpg/include/ecpglib.h
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@ -1,7 +1,7 @@
/*
* this is a small part of c.h since we don't want to leak all postgres
* definitions into ecpg programs
* $PostgreSQL: pgsql/src/interfaces/ecpg/include/ecpglib.h,v 1.79 2009/06/11 14:49:13 momjian Exp $
* $PostgreSQL: pgsql/src/interfaces/ecpg/include/ecpglib.h,v 1.80 2009/09/18 13:13:32 meskes Exp $
*/
#ifndef _ECPGLIB_H
@ -59,7 +59,7 @@ bool ECPGdeallocate(int, int, const char *, const char *);
bool ECPGdeallocate_all(int, int, const char *);
char *ECPGprepared_statement(const char *, const char *, int);
PGconn *ECPGget_PGconn(const char *);
PGTransactionStatusType ECPGtransactionStatus(const char *);
char *ECPGerrmsg(void);