database-sequence

I have a table create table testtable( testtable_rid serial not null, data integer not null, constraint pk_testtable primary key(testtable_rid) ); So lets say I do this code about 20 times: begin; insert into testtable (data) values (0); rollback; and then I do begin; insert into testtable (data) values (0); commit; And finally a select * from testtable Result: row0: testtable_rid=21 | data=0 Expected result: row0: testtable_rid=1 | data=0 As you can see, sequences do not appear to be affected by transaction rollbacks. They continue to increment as if the transaction was committed and then the

I'm trying to set a sequence to a specific value. SELECT setval('payments_id_seq'), 21, true This gives an error: ERROR: function setval(unknown) does not exist Using ALTER SEQUENCE doesn't seem to work either? ALTER SEQUENCE payments_id_seq LASTVALUE 22 How can this be done? Ref: https://www.postgresql.org/docs/current/static/functions-sequence.html NPE The parentheses are misplaced: SELECT setval('payments_id_seq', 21, true); # next value will be 22 Otherwise you're calling setval with a single argument, while it requires two or three. This syntax isn't valid in any version of PostgreSQL: