Horton

Re: Phrase search vs. multi-lexeme tokens

Alexander Korotkov <aekorotkov@gmail.com>

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From: Alexander Korotkov <aekorotkov@gmail.com>
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: pgsql-hackers <pgsql-hackers@postgresql.org>
Date: 2021-01-20T17:27:01Z
Lists: pgsql-hackers

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On Thu, Jan 7, 2021 at 6:36 AM Alexander Korotkov <aekorotkov@gmail.com> wrote:
>
> > I read your patch over quickly and it seems like a reasonable
> > approach (but sadly underdocumented).  Can we extend the idea
> > to fix the to_tsquery case?
>
> Sure, I'll provide a revised patch.

The next version of the patch is attached.  Now, it just makes
to_tsquery() and websearch_to_tsquery() use phrase operator to connect
multiple lexemes of the same tsquery token.  I leave plainto_tsquery()
aside because it considers the whole argument as a single token.
Changing it would make it an equivalent of phraseto_tsquery().

------
Regards,
Alexander Korotkov

Commits

  1. Fix parsing of complex morphs to tsquery