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
Branch
------
master
Details
-------
http://git.postgresql.org/pg/commitdiff/52b60530f257b1591d8b72264cd6c0dd9aabfd46
Modified Files
--------------
src/backend/tsearch/ts_selfuncs.c | 6 ++++++
src/include/catalog/pg_statistic.h | 2 ++
2 files changed, 8 insertions(+), 0 deletions(-)
