Re: BUG #1326: Unique and Primary Key index over bigint type

PostgreSQL Bugs List wrote:
> The following bug has been logged online:
>
> Bug reference: 1326
> Logged by: Fernando Kasten Peinado
>
> Email address: fernandopeinado(at)uol(dot)com(dot)br
>
> PostgreSQL version: 7.4.5
>
> Operating system: Linux RedHat 7.3
>
> Description: Unique and Primary Key index over bigint type doesn't
> work
>
> Details:
>
> index is not used when Type is bigint.

This is a known issue with versions prior to 8.0. When you provide a
constant integer smaller than 2^31 it assumes you want int4. Of course,
the planner then looks for an int4 index and can't find one.

The solution/workaround is to make sure you specify the type of your
constant, or at least make sure it doesn't look like an int4.
select * from x where x.id = 12345::int8;
select * from x where x.id = CAST(12345 AS int8);
select * from x where x.id = '12345';

The last works because '...' is type unknown so it looks at x.id to see
what type it wants and casts for you.

HTH

--
Richard Huxton
Archonet Ltd