oci_rollback
(PHP 5, PHP 7, PECL OCI8 >= 1.1.0)
oci_rollback — Rolls back the outstanding database transaction
설명
$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.
인수
-
connection -
An Oracle connection identifier, returned by oci_connect(), oci_pconnect() or oci_new_connect().
반환값
성공 시 TRUE를, 실패 시 FALSE를 반환합니다.
예제
Example #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
$r = oci_execute($stid, OCI_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)');
$r = oci_execute($stid, OCI_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);
}
?>
Example #2 Rolling back to a SAVEPOINT example
<?php
$stid = oci_parse($conn, 'UPDATE mytab SET id = 1111');
oci_execute($stid, OCI_NO_AUTO_COMMIT);
// Create the savepoint
$stid = oci_parse($conn, 'SAVEPOINT mysavepoint');
oci_execute($stid, OCI_NO_AUTO_COMMIT);
$stid = oci_parse($conn, 'UPDATE mytab SET id = 2222');
oci_execute($stid, OCI_NO_AUTO_COMMIT);
// Use an explicit SQL statement to rollback to the savepoint
$stid = oci_parse($conn, 'ROLLBACK TO SAVEPOINT mysavepoint');
oci_execute($stid, OCI_NO_AUTO_COMMIT);
oci_commit($conn); // mytab now has id of 1111
?>
주의
Note:
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_SUCCESSmode 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.
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