PHP. Руководство по PHP. 2005

maxdb_rollback

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maxdb_rollback

(PECL)maxdb_rollback

(no version information, might be only in CVS)maxdb->rollback -- Rolls back current transaction

Description

bool maxdb_rollback (resource link)

class maxdb {

bool rollback (void)

}

Rollbacks the current transaction for the database specified by the link parameter.

Return values

Возвращает TRUE в случае успешного завершения или FALSE в случае возникновения ошибки.

Example

Пример 1. Object oriented style


<?
$maxdb = new maxdb("localhost", "MONA", "RED", "DEMODB");
/*check connection*/
if (maxdb_connect_errno()){
printf("Connect failed: %s\n", maxdb_connect_error());
exit();
}
/*disable autocommit*/
$maxdb->autocommit(FALSE);
$maxdb->query("CREATE TABLE temp.mycity LIKE hotel.city");
$maxdb->query("INSERT INTO temp.mycity SELECT * FROM hotel.city");
/*commit insert*/
$maxdb->commit();
/*delete all rows*/
$maxdb->query("DELETE FROM temp.mycity");
if ($result = $maxdb->query("SELECT COUNT(*) FROM temp.mycity")){
$row = $result->fetch_row();
printf("%d rows in table mycity.\n", $row[0]);
/*Free result*/
$result->close();
}
/*Rollback*/
$maxdb->rollback();
if ($result = $maxdb->query("SELECT COUNT(*) FROM temp.mycity")){
$row = $result->fetch_row();
printf("%d rows in table mycity (after rollback).\n", $row[0]);
/*Free result*/
$result->close();
}
/*Drop table myCity*/
$maxdb->query("DROP TABLE temp.mycity");
$maxdb->close();

?>

Пример 2. Procedural style


<?
$link = maxdb_connect("localhost", "MONA", "RED", "DEMODB");
/*check connection*/
if (maxdb_connect_errno()){
printf("Connect failed: %s\n", maxdb_connect_error());
exit();
}
/*disable autocommit*/
maxdb_autocommit($link, FALSE);
maxdb_query($link, "CREATE TABLE temp.mycity LIKE hotel.city");
maxdb_query($link, "INSERT INTO temp.mycity SELECT * FROM hotel.city");
/*commit insert*/
maxdb_commit($link);
/*delete all rows*/
maxdb_query($link, "DELETE FROM temp.mycity");
if ($result = maxdb_query($link, "SELECT COUNT(*) FROM temp.mycity")){
$row = maxdb_fetch_row($result);
printf("%d rows in table mycity.\n", $row[0]);
/*Free result*/
maxdb_free_result($result);
}
/*Rollback*/
maxdb_rollback($link);
if ($result = maxdb_query($link, "SELECT COUNT(*) FROM temp.mycity")){
$row = maxdb_fetch_row($result);
printf("%d rows in table mycity (after rollback).\n", $row[0]);
/*Free result*/
maxdb_free_result($result);
}
/*Drop table myCity*/
maxdb_query($link, "DROP TABLE temp.mycity");
maxdb_close($link);

?>

The above examples would produce the following output:

0 rows in table mycity.
25 rows in table mycity (after rollback).

maxdb_report

maxdb_rpl_parse_enabled

Отвечу на любые вопросы. С уважением, Дмитрий Владимирович.

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PHP. Руководство по PHP. 2005

maxdb_rollback

Description

Return values

See also

Example