Re: Unicode combining characters

From: "Zeugswetter Andreas SB SD" <ZeugswetterA(at)spardat(dot)at>
To: "Tatsuo Ishii" <t-ishii(at)sra(dot)co(dot)jp>, <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: <pgman(at)candle(dot)pha(dot)pa(dot)us>, <phede-ml(at)islande(dot)org>, <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Unicode combining characters
Date: 2001-10-03 08:09:46
Message-ID: 46C15C39FEB2C44BA555E356FBCD6FA41EB3A4@m0114.s-mxs.net
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> ------------- shell script -------------------
> for i in 32 64 128 256 512 1024 2048 4096 8192
> do
> psql -c "explain analyze select liketest(a,'aaa') from
> (select substring('very_long_text' from 0 for $i) as a) as a" test
> done
> ------------- shell script -------------------

I don't think your search string is sufficient for a test.
With 'aaa' it actually knows that it only needs to look at the
first three characters of a. Imho you need to try something
like liketest(a,'%aaa%').

Andreas

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