Re: Retrieving result of COUNT(*) with PHP

["Gavin M. Roy" <gmr(at)ehpg(dot)net>]

On 3/28/07, Mihail Mihailov <Mihail(dot)Mihailov(at)uta(dot)fi> wrote:

Another way to calculate number of rows in the result is to use
pg_num_rows function.
$res = pg_query("SELECT COUNT(*) AS result_count FROM etc. WHERE etc.");
$count = pg_num_rows($res);

I dont think this will work as expected.  PostgreSQL will return 1 row and your $count var will be 1.  If you do SELECT * FROM it would return the proper result.  Not very effective for speed though.

http://www.varlena.com/GeneralBits/120.php has some good suggestions for dealing with count(*) speed issues.

Gavin