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| author | Tom Lane <tgl@sss.pgh.pa.us> | 2011-02-17 19:00:49 -0500 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2011-02-17 19:00:49 -0500 |
| commit | 52b60530f257b1591d8b72264cd6c0dd9aabfd46 (patch) | |
| tree | 6eda7c7cbeaac73debfe3526614a65a8db272a58 /src/backend/executor/execProcnode.c | |
| parent | de623f33353c96657651f9c3a6c8756616c610e4 (diff) | |
| download | postgresql-52b60530f257b1591d8b72264cd6c0dd9aabfd46.tar.gz postgresql-52b60530f257b1591d8b72264cd6c0dd9aabfd46.zip | |
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/execProcnode.c')
0 files changed, 0 insertions, 0 deletions