From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
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To: | Vince Vielhaber <vev(at)michvhf(dot)com> |
Cc: | hackers(at)postgreSQL(dot)org |
Subject: | Re: [HACKERS] libpq++ doc error? |
Date: | 1999-10-06 14:10:17 |
Message-ID: | 13509.939219017@sss.pgh.pa.us |
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Lists: | pgsql-hackers |
Vince Vielhaber <vev(at)michvhf(dot)com> writes:
> I just sent patches for libpq++ to return an int (I'll also submit changes
> to the sgml docs) and return a -1 if PQcmdTuples() returns a NULL pointer.
> I just haven't been able to convince it to return a NULL.
It won't. If you look at the source, it's quite clear that it never
returns NULL. It will return an empty string ("") if it notices a
problem.
Also, if you wanted to be really paranoid you'd check that what it
returns actually looks like it is a number, because PQcmdTuples doesn't
check that there is a number in the right spot in the command status
returned by the backend.
These two points together are why I suggested testing for an initial
digit...
regards, tom lane
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