On Sat, 27 Oct 2007, Tom Lane wrote:
"Catalin Marinas" <catalin.marinas@xxxxxxxxx> writes:
Is there an easy way to generate a headline from separate fragments
containing the search words and maybe separated by "..."?
Hmm, the documentation for ts_headline claims it does this already:
<function>ts_headline</function> 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.
However, a quick look at the code suggests this is a lie --- I see no
evidence whatever that there's any smarts for putting in ellipses.
Oleg, Teodor, is there something I missed here? Or do we need to change
the documentation?
Probably documentation is not correct here. 'ellipsis-separated' should be
treated as a general wording. Default highlighting is <b>..</b> as it
stated below in docs.
postgres=# select ts_headline('this is a highlighted text','highlight'::tsquery, 'StartSel=...,StopSel=...')
postgres-# ;
ts_headline
----------------------------------
this is a ...highlighted... text
Regards,
Oleg
_____________________________________________________________
Oleg Bartunov, Research Scientist, Head of AstroNet (www.astronet.ru),
Sternberg Astronomical Institute, Moscow University, Russia
Internet: oleg@xxxxxxxxxx, http://www.sai.msu.su/~megera/
phone: +007(495)939-16-83, +007(495)939-23-83
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