"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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