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PHP

Rolls back current transaction


maxdb_rollback

maxdb::rollback

(PECL maxdb >= 1.0)

maxdb_rollback -- maxdb::rollbackRolls back current transaction

Description

Procedural style

bool maxdb_rollback ( resource $link )

Object oriented style

bool maxdb::rollback ( void )

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

Return Values

Returns TRUE on success or FALSE on failure.

Examples

Example #1 Object oriented style

<?php
$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();
?>

Example #2 Procedural style

<?php
$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($linkFALSE);

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 example will output something similar to:

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

See Also



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