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author | Tom Lane <tgl@sss.pgh.pa.us> | 2008-07-14 00:51:46 +0000 |
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committer | Tom Lane <tgl@sss.pgh.pa.us> | 2008-07-14 00:51:46 +0000 |
commit | 6f6d8632583353d60fe3bb1694b39f6124f6e5d1 (patch) | |
tree | fcd0a2eee9e7a5efbb17ab6312d4da2a96bfefd2 /src/bin/scripts/createlang.c | |
parent | 6816577a786cd9be257f6600e3cde2d86f5adb46 (diff) | |
download | postgresql-6f6d8632583353d60fe3bb1694b39f6124f6e5d1.tar.gz postgresql-6f6d8632583353d60fe3bb1694b39f6124f6e5d1.zip |
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
Diffstat (limited to 'src/bin/scripts/createlang.c')
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