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| author | Tom Lane <tgl@sss.pgh.pa.us> | 2011-02-17 19:00:54 -0500 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2011-02-17 19:00:54 -0500 |
| commit | 848cd3289e4d08f9a3c78f654ceb6e3f754e1dd3 (patch) | |
| tree | f2d2a2420fde8b6d8a4f8259b0fc7f7df749a680 /src/backend/executor | |
| parent | 7422e0081d04ee4373a822392c729eb892a9d25e (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
Diffstat (limited to 'src/backend/executor')
0 files changed, 0 insertions, 0 deletions