From: Tom Lane <tgl@sss.pgh.pa.us>
To: Oleg Bartunov <obartunov@gmail.com>
To: Teodor Sigaev <teodor@sigaev.ru>
Cc: Andreas Seltenreich <seltenreich@gmx.de>
Cc: pgsql-hackers@postgresql.org
Subject: Re: [sqlsmith] Failed assertion in TS_phrase_execute
Date: Sat, 26 Nov 2016 17:33:56 -0500
Message-ID: <24331.1480199636@sss.pgh.pa.us> (raw)
In-Reply-To: <14732.1480186277@sss.pgh.pa.us>
References: <87eg1y2s3x.fsf@credativ.de>
<14732.1480186277@sss.pgh.pa.us>
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I wrote:
> but I notice that some normalization seems to be getting done by
> tsqueryin:
> regression=# select $$( 'sanct' & 'peter' ) <-> ( 'sanct' & 'peter' )$$::tsquery;
> tsquery
> --------------------------------------------------------------------------------
> -------
> 'sanct' <-> 'sanct' & 'peter' <-> 'sanct' & 'sanct' <-> 'peter' & 'peter' <-> '
> peter'
> (1 row)
BTW, it seems like that normalization is wrong. The transformed query
should (and does) match the string "sanct sanct peter sanct sanct peter
peter peter", since each of the <-> pairs has a match somewhere in there.
But I would expect the original query to be specifying that a match occurs
at exactly one place, which of course is unsatisfiable since 'sanct' and
'peter' can't match the same word.
regards, tom lane
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To: pgsql-hackers@postgresql.org
Cc: tgl@sss.pgh.pa.us, obartunov@gmail.com, teodor@sigaev.ru, seltenreich@gmx.de
Subject: Re: [sqlsmith] Failed assertion in TS_phrase_execute
In-Reply-To: <24331.1480199636@sss.pgh.pa.us>
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