insert into g_test values (1,'x');
commit;
update g_test set f=2,b='y';
savepoint a;
update g_test set f=3;
savepoint b;
update g_test set f=4,b='z';
release savepoint a only;
rollback to savepoint a;
Statement failed, SQLSTATE = 3B000
Unable to find savepoint with name A in transaction context
After line 11 in file g_test_m.sql
commit;
select * from g_test;

           F                 B
============ =================
           1              80:0
==============================================================================
B:
x
==============================================================================