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BUG #4887: inclusion operator (@>) on tsqeries behaves not conforming to documentation

From: "Alexey Bashtanov" <bashtanov(at)imap(dot)cc>
To: pgsql-bugs(at)postgresql(dot)org
Subject: BUG #4887: inclusion operator (@>) on tsqeries behaves not conforming to documentation
Date: 2009-06-26 12:54:22
Message-ID: 200906261254.n5QCsMCx020480@wwwmaster.postgresql.org (view raw or flat)
Thread:
Lists: pgsql-bugspgsql-hackers
The following bug has been logged online:

Bug reference:      4887
Logged by:          Alexey Bashtanov
Email address:      bashtanov(at)imap(dot)cc
PostgreSQL version: 8.3.1, 8.3.7
Operating system:   Linux 2.6.20 FC5 i686, Linux 2.6.27 FC10 i686
Description:        inclusion operator (@>) on tsqeries behaves not
conforming to documentation
Details: 

Hello!

'!a|b'::tsquery <@ 'a|b'::tsquery evaluates to false, but should evalueate
to true
(http://www.postgresql.org/docs/8.3/interactive/functions-textsearch.html
says "The tsquery containment operators consider only the lexemes listed in
the two queries, ignoring the combining operators.")

I think negation operator is treated as a lexeme. So please correct the
behaviour of operators or rewrite this line of docs.

Thanks,
 Alexey

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