January 2002
Intermediate to advanced
640 pages
16h 39m
English
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Rollback
Aborts the current transaction block and abandons any modifications it would have made.
Synopsis
ROLLBACK [ WORK | TRANSACTION ]
Parameters
WORK | TRANSACTIONA pair of optional noise keywords. They can be ignored, or used to make your SQL more readable.
Results
ABORTThe message returned when a transaction is aborted successfully.
NOTICE: ROLLBACK: no transaction in progressThe 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
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