(PHP 3 >= 3.0.3, PHP 4, PHP 5)
ifx_affected_rows -- Get number of rows affected by a query
Description
int
ifx_affected_rows ( int result_id )
result_id is a valid result id returned by
ifx_query() or
ifx_prepare().
Returns the number of rows affected by a query associated with
result_id.
For inserts, updates and deletes the number is the real number
(sqlerrd[2]) of affected rows. For selects it is an estimate
(sqlerrd[0]). Don't rely on it. The database server can never
return the actual number of rows that will be returned by a
SELECT because it has not even begun fetching them at this stage
(just after the "PREPARE" when the optimizer has determined the
query plan).
Useful after ifx_prepare() to limit queries to
reasonable result sets.
Пример 1. Informix affected rows
<?php
$rid = ifx_prepare("select * from emp
where name like " . $name, $connid);
if (! $rid) {
/* ... error ... */
}
$rowcount = ifx_affected_rows($rid);
if ($rowcount > 1000) {
printf ("Too many rows in result set (%d)\n<br />", $rowcount);
die ("Please restrict your query<br />\n");
}
?>
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See also ifx_num_rows().