ifx_affected_rows

(No version information available, might be only in CVS)

ifx_affected_rows — Get number of rows affected by a query

说明

int ifx_affected_rows ( resource $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.

参数

result_id: A valid result id returned by ifx_query() or ifx_prepare().

返回值

Returns the number of rows as an integer.

范例

Example#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");
}
?>

参见

ifx_num_rows()


	PHP5中文手册 Informix ifx_blobinfile_mode Informix PHP Manual ifx_affected_rows (No version information available, might be only in CVS) ifx_affected_rows — Get number of rows affected by a query 说明 int ifx_affected_rows ( resource `$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. 参数 `result_id` A valid result id returned by ifx_query() or ifx_prepare(). 返回值 Returns the number of rows as an integer. 范例 Example#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"); } ?>` 参见 ifx_num_rows() Informix ifx_blobinfile_mode Informix PHP Manual