ROLLBACK
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## ROLLBACK

ROLLBACK — abort the current transaction

## Synopsis

    ROLLBACK [ WORK | TRANSACTION ] [ AND [ NO ] CHAIN ]

## Description

`ROLLBACK` rolls back the current transaction and causes all the updates made by the transaction to be discarded.

## Parameters

`WORK`
`TRANSACTION`

  Optional key words. They have no effect.

`AND CHAIN`

  If `AND CHAIN` is specified, a new transaction is immediately started with the same transaction characteristics (see SET TRANSACTION) as the just finished one. Otherwise, no new transaction is started.

## Notes

Use `COMMIT` to successfully terminate a transaction.

Issuing `ROLLBACK` outside of a transaction block emits a warning and otherwise has no effect. `ROLLBACK AND CHAIN` outside of a transaction block is an error.

## Examples

To abort all changes:

    ROLLBACK;

## Compatibility

The command `ROLLBACK` conforms to the SQL standard. The form `ROLLBACK TRANSACTION` is a PostgreSQL extension.

## See Also

BEGIN, COMMIT, ROLLBACK TO SAVEPOINT

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