Bruce Momjian wrote:
> Pavel Stehule wrote:
>> Hello,
>>
>> I miss doc for this operator
>
> Strang IS [NOT] OF wasn't documented, especially seeing it was added in
> PostgreSQL 7.3. Anyway, documented and backpatched to 8.2.X.
Here's the reason -- see this thread:
http://archives.postgresql.org/pgsql-patches/2003-08/msg00062.php
Joe