2012/8/23 Tom Lane :
> Fujii Masao writes:
>> On Wed, Aug 22, 2012 at 12:59 AM, Kasahara Tatsuhito
>> wrote:
>>> The latest document (doc/src/sgml/ddl.sgml) says
>>> ===
>>> 2974
>>> 2975
>>> 2976
>>> 2977 Constraint exclusion only works when the query's
>>> WHERE
>>> 2978 clause contains constants. A parameterized query will not be
>>> 2979 optimized, since the planner cannot know which partitions the
>>> 2980 parameter value might select at run time. For the same reason,
>>> 2981 stable functions such as
>>> CURRENT_DATE
>>> 2982 must be avoided.
>>> 2983
>>> 2984 >> ===
>>> but in my understanding, this problem will be solved on 9.2 (with
>>> parameterized plans).
>>>
>>> Or some issues still remain ?
>
>> At least this limitation "A parameterized query will not be optimized,
>> since the planner cannot know which partitions the parameter value
>> might select at run time." has been solved unless I'm missing something.
>> So we should just get rid of that sentence from the document.
>
> Yes, I think we can take that out now. The issue with stable functions
> still remains though.
Thanks for your replay.
I see we can remove the topic from the doc except a issue with stable functions.
Best regards,
--
Tatsuhito Kasahara
kasahara.tatsuhito _at_ gmail.com
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