Re: ts_headline

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От Stephen Davies
Тема Re: ts_headline
Дата
Msg-id 200802212016.31857.scldad@sdc.com.au
обсуждение исходный текст
Ответ на Re: ts_headline  (Richard Huxton <dev@archonet.com>)
Ответы Re: ts_headline
Список pgsql-general
Attached is the "document" in question.

Searches for "norwegian", "thesaurus" and "statement" give good results. A
search for "database" gives the plain text from the beginning.

Cheers and thanks,
Stephen Davies

On Thursday 21 February 2008 20:08, Richard Huxton wrote:
> Stephen Davies wrote:
> > G'day Richard.
> >
> > I don't think so. A sample command is:
> >
> > ts_headline(abstract,to_tsquery('english','database'),'minWords = 99,
> > maxWords = 999')
> >
> > I have also tried with smaller maxwords without any visible effect.
>
> Hmm - a simple test seems to work OK.
>
> SELECT ts_headline( repeat('apple banana carrot ', 100),
> to_tsquery('apple'));
>                                                                ts_headline
> ---------------------------------------------------------------------------
>------------------------------------------------------------- <b>apple</b>
> banana carrot <b>apple</b> banana carrot <b>apple</b> banana carrot
> <b>apple</b> banana carrot <b>apple</b> banana carrot (1 row)
>
> It's not just the start of the text either:
>
> SELECT ts_headline( repeat('elephant ', 100) || repeat('apple banana
> carrot ', 100), to_tsquery('apple'));
>                                                                ts_headline
> ---------------------------------------------------------------------------
>------------------------------------------------------------- <b>apple</b>
> banana carrot <b>apple</b> banana carrot <b>apple</b> banana carrot
> <b>apple</b> banana carrot <b>apple</b> banana carrot (1 row)
>
> Can you provide a piece of text that shows the problem?

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