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SQL Anywhere 11.0.1 » SQL Anywhere Server - SQL Reference » Using SQL » SQL statements » SQL statements (P-Z)

 

ROLLBACK TRANSACTION statement [T-SQL]

Use this statement to cancel any changes made since a SAVE TRANSACTION.

Syntax
ROLLBACK TRANSACTION [ savepoint-name ]
Remarks

The ROLLBACK TRANSACTION statement undoes any changes that have been made since a savepoint was established using SAVE TRANSACTION. Changes made prior to the SAVE TRANSACTION are not undone; they are still pending.

The savepoint-name is an identifier that was specified on a SAVE TRANSACTION statement within the current transaction. If savepoint-name is omitted, all outstanding changes are rolled back. Any savepoints since the named savepoint are automatically released.

Permissions

There must be a corresponding SAVE TRANSACTION within the current transaction.

Side effects

None.

See also
Standards and compatibility
  • SQL/2003   Vendor extension.

Example

The following example displays five rows with values 10, 20, and so on. The effect of the DELETE, but not the prior INSERTs or UPDATE, is undone by the ROLLBACK TRANSACTION statement.

BEGIN
    SELECT row_num INTO #tmp 
    FROM sa_rowgenerator( 1, 5 ) 
    UPDATE #tmp SET row_num=row_num*10
    SAVE TRANSACTION before_delete
    DELETE FROM #tmp WHERE row_num >= 3
    ROLLBACK TRANSACTION before_delete
    SELECT * FROM #tmp
END