ifx_affected_rows - Get number of rows affected by a query
Вернуться к: Informix Функции
ifx_affected_rows
(PHP 4, PHP <=5.2.0)
ifx_affected_rows — Get number of rows affected by a query
Описание
$result_id
)
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.
Возвращаемые значения
Returns the number of rows as an integer.
Примеры
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");
}
?>
Вернуться к: Informix Функции