| commit | 12a19de4dcae075b5eb0e627f15458eb1c2ca7f8 | |
| author | tgl <tgl> | |
| Mon, 14 Jul 2008 00:51:46 +0000 (14 00:51 +0000) | ||
| committer | tgl <tgl> | |
| Mon, 14 Jul 2008 00:51:46 +0000 (14 00:51 +0000) | ||
| tree | 8c2a980adedd0cb46f48c796fe3732fdef4742de | treesnapshot (tar.gz zip) |
| parent | 8676d942c3c6a3fa735f07a3059bbaea7b839ad3 | commitdiff |
Create a type-specific typanalyze routine for tsvector, which collects stats
on the most common individual lexemes in place of the mostly-useless default
behavior of counting duplicate tsvectors. Future work: create selectivity
estimation functions that actually do something with these stats.
(Some other things we ought to look at doing: using the Lossy Counting
algorithm in compute_minimal_stats, and using the element-counting idea for
stats on regular arrays.)
Jan Urbanski
on the most common individual lexemes in place of the mostly-useless default
behavior of counting duplicate tsvectors. Future work: create selectivity
estimation functions that actually do something with these stats.
(Some other things we ought to look at doing: using the Lossy Counting
algorithm in compute_minimal_stats, and using the element-counting idea for
stats on regular arrays.)
Jan Urbanski