Practical PostgreSQL

Rollback

Aborts the current transaction block and abandons any modifications it would have made.

Synopsis

ROLLBACK [ WORK | TRANSACTION ]

Parameters

WORK | TRANSACTION

A pair of optional noise keywords. They can be ignored, or used to make your SQL more readable.

Results

ABORT

The message returned when a transaction is aborted successfully.

NOTICE: ROLLBACK: no transaction in progress

The notice returned if there is not a transaction in progress to rollback.

Description

Use ROLLBACK to abort a transaction in progress and discard all changes either already made or queued to be made on COMMIT.

Example

The following example demonstrates how to rollback an accidental delete performed within a transaction block:

booktown=# BEGIN WORK;
BEGIN
booktown=# DELETE FROM shipments;
DELETE 36
booktown=# ROLLBACK WORK;
ROLLBACK