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(parent: 7422e00) | patch
Fix tsmatchsel() to account properly for null rows.
authorTom Lane <tgl@sss.pgh.pa.us>
Fri, 18 Feb 2011 00:00:54 +0000 (19:00 -0500)
committerTom Lane <tgl@sss.pgh.pa.us>
Fri, 18 Feb 2011 00:00:54 +0000 (19:00 -0500)
commit848cd3289e4d08f9a3c78f654ceb6e3f754e1dd3
treef2d2a2420fde8b6d8a4f8259b0fc7f7df749a680tree
parent7422e0081d04ee4373a822392c729eb892a9d25ecommit | diff
Fix tsmatchsel() to account properly for null rows.

ts_typanalyze.c computes MCE statistics as fractions of the non-null rows,
which seems fairly reasonable, and anyway changing it in released versions
wouldn't be a good idea.  But then ts_selfuncs.c has to account for that.
Failure to do so results in overestimates in columns with a significant
fraction of null documents.  Back-patch to 8.4 where this stuff was
introduced.

Jesper Krogh
src/backend/tsearch/ts_selfuncs.c diff | blob | blame | history
src/include/catalog/pg_statistic.h diff | blob | blame | history
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