PHP 5.5.16 is released

oci_rollback

(PHP 5, PECL OCI8 >= 1.1.0)

oci_rollbackRolls back the outstanding database transaction

Beschreibung

bool oci_rollback ( resource $connection )

Reverts all uncommitted changes for the Oracle connection and ends the transaction. It releases all locks held. All Oracle SAVEPOINTS are erased.

A transaction begins when the first SQL statement that changes data is executed with oci_execute() using the OCI_NO_AUTO_COMMIT flag. Further data changes made by other statements become part of the same transaction. Data changes made in a transaction are temporary until the transaction is committed or rolled back. Other users of the database will not see the changes until they are committed.

When inserting or updating data, using transactions is recommended for relational data consistency and for performance reasons.

Parameter-Liste

connection

An Oracle connection identifier, returned by oci_connect(), oci_pconnect() or oci_new_connect().

Rückgabewerte

Gibt bei Erfolg TRUE zurück. Im Fehlerfall wird FALSE zurückgegeben.

Beispiele

Beispiel #1 oci_rollback() example

<?php

// Insert into several tables, rolling back the changes if an error occurs

$conn oci_connect('hr''welcome''localhost/XE');

$stid oci_parse($conn"INSERT INTO mysalary (id, name) VALUES (1, 'Chris')");

// The OCI_NO_AUTO_COMMIT flag tells Oracle not to commit the INSERT immediately
// Use OCI_DEFAULT as the flag for PHP <= 5.3.1.  The two flags are equivalent
$r oci_execute($stidOCI_NO_AUTO_COMMIT);
if (!
$r) {    
    
$e oci_error($stid);
    
trigger_error(htmlentities($e['message']), E_USER_ERROR);
}

$stid oci_parse($conn'INSERT INTO myschedule (startday) VALUES (12)');
$r oci_execute($stidOCI_NO_AUTO_COMMIT);
if (!
$r) {    
    
$e oci_error($stid);
    
oci_rollback($conn);  // rollback changes to both tables
    
trigger_error(htmlentities($e['message']), E_USER_ERROR);
}

// Commit the changes to both tables
$r oci_commit($conn);
if (!
r) {
    
$e oci_error($conn);
    
trigger_error(htmlentities($e['message']), E_USER_ERROR);
}

?>

Beispiel #2 Rolling back to a SAVEPOINT example

<?php
$stid 
oci_parse($conn'UPDATE mytab SET id = 1111');
oci_execute($stidOCI_NO_AUTO_COMMIT);

// Create the savepoint
$stid oci_parse($conn'SAVEPOINT mysavepoint');
oci_execute($stidOCI_NO_AUTO_COMMIT);

$stid oci_parse($conn'UPDATE mytab SET id = 2222');
oci_execute($stidOCI_NO_AUTO_COMMIT);

// Use an explicit SQL statement to rollback to the savepoint
$stid oci_parse($conn'ROLLBACK TO SAVEPOINT mysavepoint');
oci_execute($stidOCI_NO_AUTO_COMMIT);

oci_commit($conn);  // mytab now has id of 1111
?>

Anmerkungen

Hinweis:

Transactions are automatically rolled back when you close the connection, or when the script ends, whichever is soonest. You need to explicitly call oci_commit() to commit the transaction.

Any call to oci_execute() that uses OCI_COMMIT_ON_SUCCESS mode explicitly or by default will commit any previous uncommitted transaction.

Any Oracle DDL statement such as CREATE or DROP will automatically commit any uncommitted transaction.

Siehe auch

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