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| author | Tom Lane <tgl@sss.pgh.pa.us> | 2012-07-21 17:45:15 -0400 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2012-07-21 17:45:15 -0400 |
| commit | 641054ad7882a701cf3ac4c5666f6ee59103d3a7 (patch) | |
| tree | 4dfa6889904b4df2d59c67a6630b70c291c8218c /src/backend/access/gist/gist.c | |
| parent | c6c6f2192dfd7d4e77bd00b698feef284ddabfaa (diff) | |
| download | postgresql-641054ad7882a701cf3ac4c5666f6ee59103d3a7.tar.gz postgresql-641054ad7882a701cf3ac4c5666f6ee59103d3a7.zip | |
Account for SRFs in targetlists in planner rowcount estimates.
We made use of the ROWS estimate for set-returning functions used in FROM,
but not for those used in SELECT targetlists; which is a bit of an
oversight considering there are common usages that require the latter
approach. Improve that. (I had initially thought it might be worth
folding this into cost_qual_eval, but after investigation concluded that
that wouldn't be very helpful, so just do it separately.) Per complaint
from David Johnston.
Back-patch to 9.2, but not further, for fear of destabilizing plan choices
in existing releases.
Diffstat (limited to 'src/backend/access/gist/gist.c')
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