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Remove claim that ts_headline knows how to generate multiple ellipsis-separated

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excerpts of a document.  That's clearly desirable, but the functionality
is not there yet.
This commit is contained in:
Tom Lane 2007-10-29 01:55:11 +00:00
parent 3fe266207b
commit f9e83a5588
1 changed files with 21 additions and 18 deletions
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39
doc/src/sgml/textsearch.sgml
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@ -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"> <chapter id="textsearch">
<title id="textsearch-title">Full Text Search</title> <title id="textsearch-title">Full Text Search</title>
@ -1040,7 +1040,7 @@ ORDER BY rank DESC LIMIT 10;
<para> <para>
<function>ts_headline</function> accepts a document along <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 the document in which terms from the query are highlighted. The
configuration to be used to parse the document can be specified by configuration to be used to parse the document can be specified by
<replaceable>config</replaceable>; if <replaceable>config</replaceable> <replaceable>config</replaceable>; if <replaceable>config</replaceable>
@ -1094,24 +1094,27 @@ StartSel=&lt;b&gt;, StopSel=&lt;/b&gt;, MaxWords=35, MinWords=15, ShortWord=3, H
For example: For example:
<programlisting> <programlisting>
SELECT ts_headline('ts_headline accepts a document along SELECT ts_headline('The most common type of search
with a query, and returns one or more ellipsis-separated excerpts from is to find all documents containing given query terms
the document in which terms from the query are highlighted.', and return them in order of their similarity to the
to_tsquery('ellipsis &amp; term')); query.', to_tsquery('query &amp; similarity'));
ts_headline ts_headline
-------------------------------------------------------------------- ------------------------------------------------------------
&lt;b&gt;ellipsis&lt;/b&gt;-separated excerpts from given &lt;b&gt;query&lt;/b&gt; terms
the document in which &lt;b&gt;terms&lt;/b&gt; from the query are highlighted. and return them in order of their &lt;b&gt;similarity&lt;/b&gt; to the
&lt;b&gt;query&lt;/b&gt;.
SELECT ts_headline('ts_headline accepts a document along SELECT ts_headline('The most common type of search
with a query, and returns one or more ellipsis-separated excerpts from is to find all documents containing given query terms
the document in which terms from the query are highlighted.', and return them in order of their similarity to the
to_tsquery('ellipsis &amp; term'), query.',
to_tsquery('query &amp; similarity'),
'StartSel = &lt;, StopSel = &gt;'); 'StartSel = &lt;, StopSel = &gt;');
ts_headline ts_headline
--------------------------------------------------------------- -------------------------------------------------------
&lt;ellipsis&gt;-separated excerpts from given &lt;query&gt; terms
the document in which &lt;terms&gt; from the query are highlighted. and return them in order of their &lt;similarity&gt; to the
&lt;query&gt;.
</programlisting> </programlisting>
</para> </para>