Re: Could postgres12 support millions of sequences? (like 10 million)

On Sat, Mar 21, 2020 at 4:37 PM Adrian Klaver <adrian(dot)klaver(at)aklaver(dot)com>
wrote:

>
> > Anyway, It will be awesome if we have a sequence data type in a future
> > version of postgresql. They will solve a lot of problems similar to this
> > one.
>
> Actually there are already two:
>
> https://www.postgresql.org/docs/12/datatype-numeric.html#DATATYPE-SERIAL
>
> https://www.postgresql.org/docs/12/sql-createtable.html
> "
> GENERATED { ALWAYS | BY DEFAULT } AS IDENTITY [ ( sequence_options ) ]
>
> This clause creates the column as an identity column. It will have
> an implicit sequence attached to it and the column in new rows will
> automatically have values from the sequence assigned to it.
> "
>
> What you want is a built in method to pull from different sequences
> depending on the value of another column or values from multiple columns
> in the same table.
>
> Exactly. That will work fine too.