Re: BUG #6701: IS NOT NULL doesn't work on complex composites

Hello

it is not a bug - see
http://archives.postgresql.org/pgsql-hackers/2009-07/msg01525.php

Regards

Pavel Stehule

2012/6/20 <rikard(dot)pavelic(at)zg(dot)htnet(dot)hr>:
> The following bug has been logged on the website:
>
> Bug reference:      6701
> Logged by:          Rikard Pavelic
> Email address:      rikard(dot)pavelic(at)zg(dot)htnet(dot)hr
> PostgreSQL version: 9.1.3
> Operating system:   Windows 7
> Description:
>
> create type t AS (i int);
> create type complex as (t t, i int);
> create table bad(i int, c complex);
>
> insert into bad values(1, null);
> insert into bad values(1, ROW(null, 2));
> insert into bad values(1, ROW(ROW(1), 2));
>
> select * from bad;
> select * from bad where c is null;
>
> --This doesn't work as expected
> select * from bad where c is not null;
>
> --Fortunately a workaround
> select * from bad where NOT c is null;
>
>
>
> --
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