"Hitoshi Harada" <umi(dot)tanuki(at)gmail(dot)com> writes:
> 2008/12/31 Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)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.

			regards, tom lane

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• Re: WIP patch for basic window frame support at 2009-01-05 00:16:23 from Hitoshi Harada

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• Re: WIP patch for basic window frame support at 2009-01-05 00:52:49 from Hitoshi Harada

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