Re: Multicolumn primary key with null value - Mailing list pgsql-general

On Friday 23 April 2010 03.27:29 Craig Ringer wrote:
> insert into test (a,b) values ('fred',NULL);
> insert into test (a,b) values ('fred',NULL);
>
>
> ... and will succeed:

Hmm.  Perhaps not as ugly as "none" placeholders:

create unique index on test (b) where a is null;
create unique index on test (a) where b is null;

cheers
-- vbi

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