From: Tom Lane <tgl@sss.pgh.pa.us>
To: bert.horvath@fh-erfurt.de
Cc: pgsql-interfaces@postgreSQL.org
Subject: Re: C-Interface Amound of Tupels in Result after COPYout
Date: Thu, 15 Nov 2007 11:56:22 -0500
Message-ID: <4285.1195145782@sss.pgh.pa.us> (raw)
In-Reply-To: <473C775E.9080704@fh-erfurt.de>
References: <473C3851.6060300@fh-erfurt.de>
<2564.1195140420@sss.pgh.pa.us>
<473C676A.2070805@fh-erfurt.de>
<3440.1195143240@sss.pgh.pa.us>
<473C775E.9080704@fh-erfurt.de>
Bert Horvath <bert.horvath@fh-erfurt.de> writes:
> Small example:
> create table foo(bar integer);
> insert into foo values(1),(2),(3);
> res = PQexec(conn, "COPY foo TO stdout;");
> if ( PQresultStatus( res ) == PGRES_COPY_OUT )
> {
> printf("RowCount: ");
> printf("%s\n",PQcmdTuples(res)); // this is NULL
> ...
Wrong result --- at that point you've only started the COPY, not
completed it, so how would it know how many rows there are?
You need to look at the PGRES_COMMAND_OK result after the COPY.
regards, tom lane
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To: pgsql-interfaces@postgresql.org
Cc: tgl@sss.pgh.pa.us, bert.horvath@fh-erfurt.de
Subject: Re: C-Interface Amound of Tupels in Result after COPYout
In-Reply-To: <4285.1195145782@sss.pgh.pa.us>
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