diff options
| author | Tom Lane <tgl@sss.pgh.pa.us> | 2008-09-19 19:03:41 +0000 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2008-09-19 19:03:41 +0000 |
| commit | 4e57668da475f47242d8552df371a3dbef5205f8 (patch) | |
| tree | e57955d9d4e771ce6a2412651e98a060044d9d37 /doc/src | |
| parent | e2b7d0c65c611ae3044eb3a49ada71aa22cbca80 (diff) | |
Create a selectivity estimation function for the text search @@ operator.
Jan Urbanski
Diffstat (limited to 'doc/src')
| -rw-r--r-- | doc/src/sgml/catalogs.sgml | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/doc/src/sgml/catalogs.sgml b/doc/src/sgml/catalogs.sgml index 646e37d79fc..40f1ce568ed 100644 --- a/doc/src/sgml/catalogs.sgml +++ b/doc/src/sgml/catalogs.sgml @@ -1,4 +1,4 @@ -<!-- $PostgreSQL: pgsql/doc/src/sgml/catalogs.sgml,v 2.174 2008/09/15 18:43:41 tgl Exp $ --> +<!-- $PostgreSQL: pgsql/doc/src/sgml/catalogs.sgml,v 2.175 2008/09/19 19:03:40 tgl Exp $ --> <!-- Documentation of the system catalogs, directed toward PostgreSQL developers --> @@ -6664,6 +6664,9 @@ A list of the frequencies of the most common values or elements, i.e., number of occurrences of each divided by total number of rows. (NULL when <structfield>most_common_vals</structfield> is.) + For some datatypes such as <type>tsvector</>, it can also store some + additional information, making it longer than the + <structfield>most_common_vals</> array. </entry> </row> |