Establish a savepoint within the current transaction. The savepoint-name is an identifier that can be used in a RELEASE SAVEPOINT or ROLLBACK TO SAVEPOINT statement. All savepoints are automatically
released when a transaction ends. See Savepoints within transactions.
Savepoints that are established while a trigger or atomic compound statement is executing are automatically released when
the atomic operation ends.
You cannot modify data in a proxy table from within a savepoint.