Обсуждение: eekk tuples ok when there not!

postgres 6-5-1 on linux

after calling PgConnection::Exec(const char *query);
it returns PGRES_TUPLES_OK even when there is nothing in the table!
has anyone else noticed this?? or am i mad again =)


+-=-=-=-=-=-=-=-StOo-=-=-=-=-=-=-=-+

Stuart Hodgkinson - Software Engineer

Comodo Technology Development

On Fri, 20 Aug 1999, StOo wrote:

> 
> postgres 6-5-1 on linux
> 
> after calling PgConnection::Exec(const char *query);
> it returns PGRES_TUPLES_OK even when there is nothing in the table!
> has anyone else noticed this?? or am i mad again =)

PGRES_TUPLES_OK, as I've always interpreted it, means that there were no
errors in the query itself...checking for res->ntuples is how to check for
the existence of any data...

Systems Administrator @ hub.org 
primary: scrappy@hub.org           secondary: scrappy@{freebsd|postgresql}.org 

StOo <stuart@comodo.net> writes:
> after calling PgConnection::Exec(const char *query);
> it returns PGRES_TUPLES_OK even when there is nothing in the table!

Yes.  Always has, always will.  PGRES_TUPLES_OK means you did a
SELECT and had no error --- it is not an error for the SELECT
to find no matching tuples.  You have to look at PQntuples
to find out how many tuples you got back.
        regards, tom lane