diff options
| -rw-r--r-- | doc/src/sgml/textsearch.sgml | 41 |
1 files changed, 22 insertions, 19 deletions
diff --git a/doc/src/sgml/textsearch.sgml b/doc/src/sgml/textsearch.sgml index 9cab9a4b46c..9ed4b7435b7 100644 --- a/doc/src/sgml/textsearch.sgml +++ b/doc/src/sgml/textsearch.sgml @@ -1,4 +1,4 @@ -<!-- $PostgreSQL: pgsql/doc/src/sgml/textsearch.sgml,v 1.28 2007/10/27 16:01:08 tgl Exp $ --> +<!-- $PostgreSQL: pgsql/doc/src/sgml/textsearch.sgml,v 1.29 2007/10/29 01:55:11 tgl Exp $ --> <chapter id="textsearch"> <title id="textsearch-title">Full Text Search</title> @@ -1040,7 +1040,7 @@ ORDER BY rank DESC LIMIT 10; <para> <function>ts_headline</function> accepts a document along - with a query, and returns one or more ellipsis-separated excerpts from + with a query, and returns an excerpt from the document in which terms from the query are highlighted. The configuration to be used to parse the document can be specified by <replaceable>config</replaceable>; if <replaceable>config</replaceable> @@ -1094,24 +1094,27 @@ StartSel=<b>, StopSel=</b>, MaxWords=35, MinWords=15, ShortWord=3, H For example: <programlisting> -SELECT ts_headline('ts_headline accepts a document along -with a query, and returns one or more ellipsis-separated excerpts from -the document in which terms from the query are highlighted.', - to_tsquery('ellipsis & term')); - ts_headline --------------------------------------------------------------------- - <b>ellipsis</b>-separated excerpts from - the document in which <b>terms</b> from the query are highlighted. - -SELECT ts_headline('ts_headline accepts a document along -with a query, and returns one or more ellipsis-separated excerpts from -the document in which terms from the query are highlighted.', - to_tsquery('ellipsis & term'), +SELECT ts_headline('The most common type of search +is to find all documents containing given query terms +and return them in order of their similarity to the +query.', to_tsquery('query & similarity')); + ts_headline +------------------------------------------------------------ + given <b>query</b> terms + and return them in order of their <b>similarity</b> to the + <b>query</b>. + +SELECT ts_headline('The most common type of search +is to find all documents containing given query terms +and return them in order of their similarity to the +query.', + to_tsquery('query & similarity'), 'StartSel = <, StopSel = >'); - ts_headline ---------------------------------------------------------------- - <ellipsis>-separated excerpts from - the document in which <terms> from the query are highlighted. + ts_headline +------------------------------------------------------- + given <query> terms + and return them in order of their <similarity> to the + <query>. </programlisting> </para> |