Description

COMMIT commits the current transaction. All changes made by the transaction become visible to others and are guaranteed to be durable if a crash occurs.

If the transaction is in an aborted state then no changes will be made and the effect of the COMMIT will be identical to that of ROLLBACK, including the command tag output.

In either case, if the AND CHAIN parameter is specified then a new, identically configured, transaction is started.

For more information regarding transactions see Section 3.4.

Parameters

Outputs

On successful completion of a non-aborted transaction, a COMMIT command returns a command tag of the form

COMMIT

However, in an aborted transaction, a COMMIT command returns a command tag of the form

ROLLBACK

Notes

Use ROLLBACK to abort a transaction.

Issuing COMMIT when not inside a transaction does no harm, but it will provoke a warning message. COMMIT AND CHAIN when not inside a transaction is an error.

Examples

To commit the current transaction and make all changes permanent:

COMMIT;

Compatibility

The command COMMIT conforms to the SQL standard, except that no exception condition is raised in the case where the transaction was already aborted.

The form COMMIT TRANSACTION is a PostgreSQL extension.

See Also