| From: | Teodor Sigaev <teodor(at)sigaev(dot)ru> |
|---|---|
| To: | Gregory Stark <stark(at)enterprisedb(dot)com> |
| Cc: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Bruce Momjian <bruce(at)momjian(dot)us>, Michael Paesold <mpaesold(at)gmx(dot)at>, "Joshua D(dot) Drake" <jd(at)commandprompt(dot)com>, Oleg Bartunov <oleg(at)sai(dot)msu(dot)su>, pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: How does the tsearch configuration get selected? |
| Date: | 2007-06-15 20:08:02 |
| Message-ID: | 4672F1A2.1030505@sigaev.ru |
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| Lists: | pgsql-advocacy pgsql-hackers |
> To support this sanely though wouldn't you need to know which language rule a
> tsvector was generated with? Like, have a byte in the tsvector tagging it with
> the language rule forever more?
No. As corner case, dictionary might return just a number or a hash value.
>
> What I'm wondering about is if you use a different rule than what was used
> when an index entry was inserted will you get different results using the
> index than you would doing a sequential scan and reapplying the operator to
> every datum?
Rules are apllyed during creattion of tsvector, not during indexing of
tsvectors. So, sequential and index scan will return identical results.
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