ifx_affected_rows Get number of rows affected by a query php函数


ifx_affected_rows

(PHP 4, PHP <=5.2.0)

ifx_affected_rowsGet 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) <br />"$rowcount);
    die (
"Please restrict your query<br /> ");
}
?>

参见



相关阅读:
ifx_blobinfile_mode Set the default blob mode for all select queries
ifx_byteasvarchar Set the default byte mode
ifx_close Close Informix connection
ifx_connect Open Informix server connection
ifx_copy_blob Duplicates the given blob object
ifx_create_blob Creates an blob object
ifx_create_char Creates an char object
ifx_do Execute a previously prepared SQL-statement
ifx_error Returns error code of last Informix call
ifx_errormsg Returns error message of last Informix call
ifx_fetch_row Get row as an associative array
ifx_fieldproperties List of SQL fieldproperties
ifx_fieldtypes List of Informix SQL fields
ifx_free_blob Deletes the blob object
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