Re: Add RESPECT/IGNORE NULLS and FROM FIRST/LAST options

>> I think it should be set up
>> so that if the window function fails to call that, then something in
>> mainline execution of nodeWindowAgg.c throws an error when there had
>> been a RESPECT/IGNORE NULLS option.  With that idea, you could drop
>> the allowNullTreatment argument and just have the window functions
>> that support this syntax call something named along the lines of
>> WinAllowNullTreatmentOption.
> 
> Does that mean all user defined window functions start to fail after
> upgrading to PostgreSQL 19?  I am not sure if it's acceptable for
> extension developers and their users.

Probably I misunderstood what you said. Now I realize what you are
suggesting was, throwing an error *only* when a RESPECT/IGNORE NULLS
option is given and the function did not call
WinAllowNullTreatmentOption. If the option is not given, no error is
thrown even if WinAllowNullTreatmentOption is not called. I am okay
with this direction. I will post a patch for this.

Best regards,
--
Tatsuo Ishii
SRA OSS K.K.
English: http://www.sraoss.co.jp/index_en/
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