When I delete all records from a Postgresql table and then try to reset the sequence to start a new record with number 1 when it is inserted, i get different results :

SELECT setval('tblname_id_seq', (SELECT COALESCE(MAX(id),1) FROM tblname));

This sets the current value of the sequence to 1, but the NEXT record (actually the first because there are no records yet) gets number 2!

And I can't set it to 0, because the minimum value in the sequence is 1!

When I use :

ALTER SEQUENCE tblname_id_seq RESTART WITH 1;

the first record that is inserted actually gets number 1 ! But the above code doesn't accept a SELECT as a value instead of 1.

I wish to reset the sequence to number 1 when there are no records, and the first record then should start with 1. But when there ARE already records in the table, I want to reset the sequence so that the next record that is inserted will get {highest}+1

Does anyone have a clear solution for this?