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| author | Bruce Momjian <bruce@momjian.us> | 2014-03-24 15:46:59 -0400 |
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| committer | Bruce Momjian <bruce@momjian.us> | 2014-03-24 15:46:59 -0400 |
| commit | 0b5c0f3bc78d72b753387f84b9188709af3ef8fb (patch) | |
| tree | c16778e422cf44080e9ee8f2f31a0beb7bcde0b0 | |
| parent | 1420f3a9827a39e5c6c998f6fa35a6fc97903145 (diff) | |
| download | postgresql-0b5c0f3bc78d72b753387f84b9188709af3ef8fb.tar.gz postgresql-0b5c0f3bc78d72b753387f84b9188709af3ef8fb.zip | |
docs: Add short "cover density" description
Also, previous commit 1420f3a9827a39e5c6c998f6fa35a6fc97903145 to fix
ts_rank_cd() for stripped lexemes was from a patch created by Alex Hill.
| -rw-r--r-- | doc/src/sgml/textsearch.sgml | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/doc/src/sgml/textsearch.sgml b/doc/src/sgml/textsearch.sgml index 9e78286bb59..fd54c4425dc 100644 --- a/doc/src/sgml/textsearch.sgml +++ b/doc/src/sgml/textsearch.sgml @@ -885,7 +885,9 @@ SELECT plainto_tsquery('english', 'The Fat & Rats:C'); ranking for the given document vector and query, as described in Clarke, Cormack, and Tudhope's "Relevance Ranking for One to Three Term Queries" in the journal "Information Processing and Management", - 1999. + 1999. Cover density is similar to <function>ts_rank</> ranking + except that the proximity of matching lexemes to each other is + taken into consideration. </para> <para> |