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| author | Teodor Sigaev <teodor@sigaev.ru> | 2006-03-02 19:07:19 +0000 |
|---|---|---|
| committer | Teodor Sigaev <teodor@sigaev.ru> | 2006-03-02 19:07:19 +0000 |
| commit | 38c4fe87ac86965253235edf46a5908e49c8478e (patch) | |
| tree | 51b68da465c5c0a314594cc2e583de2673a63eea /contrib/tsearch2/expected | |
| parent | 85fa9f516c6e1d0fd30303a7cf1b182e1d7d69d9 (diff) | |
| download | postgresql-38c4fe87ac86965253235edf46a5908e49c8478e.tar.gz | |
Significantly improve ranking:
1) rank_cd now use weight of lexemes
2) rank_cd and rank can use any combination of normalization methods:
no normalization
normalization by log(length of document)
-----/------- by length of document
-----/------- by number of unique word in document
-----/------- by log(number of unique word in document)
-----/------- by number of covers (only rank_cd)
Improve cover's search.
TODO: changes in documentation
Diffstat (limited to 'contrib/tsearch2/expected')
| -rw-r--r-- | contrib/tsearch2/expected/tsearch2.out | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/contrib/tsearch2/expected/tsearch2.out b/contrib/tsearch2/expected/tsearch2.out index 8fb16b045d..2a60e317cd 100644 --- a/contrib/tsearch2/expected/tsearch2.out +++ b/contrib/tsearch2/expected/tsearch2.out @@ -2315,9 +2315,9 @@ An hour of storm to place The sculpture of these granite seams, Upon a woman s face. E. J. Pratt (1882 1964) '), to_tsquery('sea&thousand&years')); - rank_cd ---------- - 1.2 + rank_cd +----------- + 0.0555556 (1 row) select rank_cd(to_tsvector('Erosion It took the sea a thousand years, @@ -2329,9 +2329,9 @@ An hour of storm to place The sculpture of these granite seams, Upon a woman s face. E. J. Pratt (1882 1964) '), to_tsquery('granite&sea')); - rank_cd ----------- - 0.880303 + rank_cd +----------- + 0.0238095 (1 row) select rank_cd(to_tsvector('Erosion It took the sea a thousand years, @@ -2345,7 +2345,7 @@ Upon a woman s face. E. J. Pratt (1882 1964) '), to_tsquery('sea')); rank_cd --------- - 2 + 0.2 (1 row) select get_covers(to_tsvector('Erosion It took the sea a thousand years, |