Re: tsearch_extras extension

> On 17 Feb 2016, at 08:14, Oleg Bartunov <obartunov(at)gmail(dot)com> wrote:
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>
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> On Wed, Feb 17, 2016 at 6:57 AM, Tim Abbott <tabbott(at)mit(dot)edu> wrote:
> Just following up here since I haven't gotten a reply -- I'd love to work with someone from the Postgres community on a plan to make the tsearch_extras functionality available as part of mainline postgres.
>
>
> -Tim Abbott
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> On Wed, Feb 3, 2016 at 9:41 PM, Tim Abbott <tabbott(at)mit(dot)edu> wrote:
> Hello,
>
> I'm a maintainer of the Zulip open source group chat application. Zulip depends on a small (~200 lines) postgres extension called tsearch_extras (https://github.com/zbenjamin/tsearch_extras) that returns the actual (offset, length) pairs of all the matches for a postgres full text search query. This extension allows Zulip to do its own highlighting of the full text search matches, using a more complicated method than what Postgres supports natively.
>
> I think tsearch_extras is probably of value to others using postgres full-text search (and I'd certainly love to get out of the business of maintaining an out-of-tree postgres extension), so I'm wondering if this feature (or a variant of it) would be of interest to upstream?
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> Thanks!
>
> -Tim Abbott
>
> (See http://www.postgresql.org/message-id/flat/52C7186D(dot)8010504(at)strangersgate(dot)com#52C7186D(dot)8010504@strangersgate.com for the discussion on postgres mailing lists that caused us to write this module in the first place.)
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> Tim,
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> take a look on this patch (https://commitfest.postgresql.org/7/385/) and contact author. It contains everything you need to your purposes.
>
> btw, Stas, check on status "Returned with feedback" !
>
>
> Regards,
> Oleg
>

Hi,

Yes, this extension have some common functionality with patch. Particularly yours tsvector_lexemes and mine to_array do the same thing. I wasn’t aware of you patch when started to work on that, so I think we can ask commiter to mention you in commit message (if it that will be commited).

And how do you use ts_match_locs_array / ts_match_locs_array? To highlight search results? There is function called ts_headline that can mark matches with custom start/stop strings.

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Stas Kelvich
Postgres Professional: http://www.postgrespro.com
Russian Postgres Company