| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | "Robert Haas" <robertmhaas(at)gmail(dot)com> |
| Cc: | "Simon Riggs" <simon(at)2ndquadrant(dot)com>, "Gregory Stark" <stark(at)enterprisedb(dot)com>, "Kevin Grittner" <Kevin(dot)Grittner(at)wicourts(dot)gov>, "jd(at)commandprompt(dot)com" <jd(at)commandprompt(dot)com>, "Josh Berkus" <josh(at)agliodbs(dot)com>, "Greg Smith" <gsmith(at)gregsmith(dot)com>, pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: benchmarking the query planner |
| Date: | 2008-12-11 23:38:15 |
| Message-ID: | 13687.1229038695@sss.pgh.pa.us |
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"Robert Haas" <robertmhaas(at)gmail(dot)com> writes:
> On Thu, Dec 11, 2008 at 5:45 PM, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
>> Simon Riggs <simon(at)2ndQuadrant(dot)com> writes:
>>> I would like it even more if there was a data type specific default.
>>> Currently we have a special case for boolean, but that's it.
>>
>> No, we don't (or if we do I'd be interested to know where).
> utils/adt/selfuncs.c, get_variable_numdistinct
That's got nothing to do with stats collection; it's a fallback case
used if no stats are available.
regards, tom lane
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