Re: Multiple Table Selection

On Mon, 2002-06-10 at 19:26, arun kv wrote:
> hello sir,
> I am having a postgresql database and using php to access the
> same. i have three tables and my program has to search for the data
> entered thru my php page in all these tables.
>
> i have to enter either of name,age or company of a person and have to
> search for either of these in all the three tables and display results.for
> 1 table its working fine but for 3 tables it gives me error: Unable to
> jump to row 0 of postgresql result index 3 on *.php file. how can i
> override this warning. i have to search all the tables if i enter 1 or 2
> or all three values. how can i do the same.

Usually that error means that the query executed fine - it just found no
records.

Test the value of pg_NumRows($result) to see if you need to process the
results, viz:

$result = pg_Exec( $dbconn, $sql );
if ( !$result ) {
echo "<p> Search failed";
// Security hole to tell the user the query is busted but we log it
error_log( "Broken query: $sql", 0);
}
elseif( pg_NumRows($result) ) {
echo "<table>";
for( $i = 0; $i < pg_NumRows($result) ; $i ++ ) {
$row = pg_Fetch_Object( $result, $i );
echo "<tr><td>$row->field1</td><td>$row->field2</td></tr>\n";
}
echo "</table>";
}
else {
echo "<p> No Records Found";
}

Which is a simplification of how I wrap many of the queries I use (I put
most of this sort of logic in a standard function and just call that).

Regards,
Andrew.
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