Re: how to determine where a select statement fails

other than putting an if statement and doing 3 more queries, I can't think
of anything

something like:
if(pg_numrows == 0)
{
select * from table where streetname = streetname
if(pg_numrows == 0)
{
you found your error
}
else
{
do another query.........
}
}

Tim.

Timothy P. Maguire
Web Developer II
Harte-Hanks
978 436 3325

"Heather Johnson"
<hjohnson(at)nypost(dot)com To: <pgsql-php(at)postgresql(dot)org>
> cc:
Sent by: Subject: how to determine where a select statement
pgsql-php-owner(at)post fails
gresql.org


07/26/01 11:15 AM

I am using php to do a select query which returns rows on the condition
that
a conjunction is true in the WHERE clause. This is the SELECT statement:

SELECT low_range, high_range, st_name, city, zip FROM router
WHERE st_name = '$st_name' AND city = '$city' AND zip = '$zip';

In the event that the query fails to return any rows, I'd like to be able
to
determine which conjunct caused it to fail. So, for example, if the
user-entered $st_name isn't in the router table, I'd like to know that
st_name = '$st_name' is what made the conjunction false and caused the
query
to fail. $pg_errormsg isn't this specific about query failures though. Does
anyone know how I might be able to get this information?

Thanks!
Heather Johnson

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