On 2/16/24 10:10 AM, David G. Johnston wrote:
By explicitly making a column an IDENTITY column it is going to make a sequence behind the scenes even if one with a similar name exists. I tried and it created part_tab_part_id_seq1. Is there no way to have it use the original part_tab_part_id_seq?
No, the fact that there is even a sequence is mostly an implementation detail you shouldn't be concerned with.
Actually you should be concerned with/aware of this detail for the reason you state below.
How do I get the data and the sequence in sync?
That would be why the alter table command has a bunch of keywords and values as part of it. So you can modify the values to be what you need.
From
https://www.postgresql.org/docs/current/sql-altertable.html
"
SET sequence_option
RESTART These forms alter the sequence that underlies an existing identity column. sequence_option is an option supported by ALTER SEQUENCE such as INCREMENT BY.
- "
You need to know how a sequence works and what can be modified.
--
Adrian Klaver
adrian.klaver@aklaver.com