2009/1/5 Tom Lane <tgl@sss.pgh.pa.us>:
> "Hitoshi Harada" <umi.tanuki@gmail.com> writes:
>> 2008/12/31 Tom Lane <tgl@sss.pgh.pa.us>:
>>> RANGE UNBOUNDED PRECEDING -- same as AND CURRENT ROW
>>> ROWS UNBOUNDED PRECEDING -- same as AND CURRENT ROW
>
>> Is this true?
>
> 7.11 syntax rule 9 says so. AFAICS general rule 5b doesn't discuss the
> case where <window frame bound 2> isn't present, and doesn't need to
> because of syntax rule 9.
>
OK, I've just found it and confirmed Oracle does so.
--
Hitoshi Harada
