C#•2y ago

❔ Auto incremented Id not sequential

Hello, I have an auto increment on an Id(integer) column on a database, however values are not sequential. The gaps aren't caused by deletion, as we have no functionality for it on our website( unless someone is intentionally deleting them by hand :p ). For example, these are the Id's for the first 22 records from the db:

Is this something to worry about? I'm using EF core.

8 Replies

honk•2y ago

Just realized most of these are incrementing by 33, however there are a few exceptions catthinking

Pobiega•2y ago

What database software? Is it perhaps using HiLo? in MSSQL, its possible to tell a table to use a certain sequence to get its IDs from, and a sequence could easily be configured to have an increment of 33

honk•2y ago

I'm using Postgres db and looking at the sequence, nothing seems to be out of the ordinary( it was auto generated by ef). The issue seems to be with this table only as well.

Pobiega•2y ago

But there is a sequence specifically for this table?

honk•2y ago

Yes.

create sequence "MyTable_Id_seq";

alter sequence "MyTable_Id_seq" owner to postgres;

alter sequence "MyTable_Id_seq" owned by "MyTable"."Id";

create sequence "MyTable_Id_seq";

alter sequence "MyTable_Id_seq" owner to postgres;

alter sequence "MyTable_Id_seq" owned by "MyTable"."Id";

Pobiega•2y ago

Alright, my postgres isn't amazing, but if you were to check currval and nextval on that, (use a transaction and roll it back!), what do you get https://www.postgresql.org/docs/current/functions-sequence.html

honk•2y ago

Sorry for the late response, discord isn't showing me notifications for some reason. Nextval incremented the value by 1 each time I called it

Accord•2y ago

Was this issue resolved? If so, run /close - otherwise I will mark this as stale and this post will be archived until there is new activity.

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❔ Auto incremented Id not sequential