Re: COPY data into a table with a SERIAL column?

On Thu, Oct 16, 2014 at 11:44 AM, lup [via PostgreSQL] <
ml-node+s1045698n5823292h76(at)n5(dot)nabble(dot)com> wrote:

>
>
> I appreciate the vastness of bigserial but I think it starts at 1. Are
> negative numbers even allowed?

​http://www.postgresql.org/docs/9.3/static/sql-createsequence.html

A DEFAULT sequence starts at one but it is able to generate any biginteger
value.​ Regardless, the value generated by the sequence and the allowed
values for the target column are distinct - which is why a sequence
attached to a normal integer will start throwing "value out of bounds"
errors before it runs out of values.

Therefore, by default if one is able to live with disallowing half of the
bigint range for auto-generation using the negative half of the range for
manual assignment is a quick-and-simple solution to the problem.

David J.

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