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| author | Tom Lane <tgl@sss.pgh.pa.us> | 2011-02-17 19:01:01 -0500 |
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| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2011-02-17 19:01:01 -0500 |
| commit | 2b3a0630b54ff9970a7cd2c78a686015f9a53c0c (patch) | |
| tree | 5dfcc711292be33f0a8097cfa848f5c86ef22131 /src/backend/access/gist/gistproc.c | |
| parent | 42e663cc4139bba218efccfb53293cd6e6fa43da (diff) | |
| download | postgresql-2b3a0630b54ff9970a7cd2c78a686015f9a53c0c.tar.gz postgresql-2b3a0630b54ff9970a7cd2c78a686015f9a53c0c.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/access/gist/gistproc.c')
0 files changed, 0 insertions, 0 deletions