On 03/23/2016 02:53 AM, Tatsuo Ishii wrote:
>> The users will be able to define statistics with the limitation that
>> only a single one (the one covering the most columns referenced by the
>> clauses) can be used when estimating a query. Which is not perfect,
>> but I think it's a valuable improvement.
>>
>> It might also be possible to split 0006 into smaller pieces, for
>> example implementing the "non-overlapping statistics" case first and
>> then extending it to more complicated cases. That might increase the
>> change of getting at least some of that into 9.6 ...
>>
>> But considering it's not clear whether the initial chunks are likely
>> to make it into 9.6 - I kinda expect a fair amount of comments from TL
>> about the preceding parts, who mentioned he might look at the patch
>> this week. So I'm not sure splitting 0006 into smaller pieces makes
>> sense at this point.
>
> Thanks for the explanation. I will look into patch 0001 to 0005 so
> that they could get into 9.6.
>
> In the mean time after applying patch 0001 to 0005 of v16, I get this
> while compiling SGML docs.
>
> openjade:ref/create_statistics.sgml:281:26:X: reference to non-existent ID "SQL-ALTERSTATISTICS"
> openjade:ref/drop_statistics.sgml:86:26:X: reference to non-existent ID "SQL-ALTERSTATISTICS"
I believe this is because reference.sgml is missing a call to
&alterStatistic (per report by Alvaro Herrera).
thanks
--
Tomas Vondra http://www.2ndQuadrant.com
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