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Re: UTF-8 and LIKE vs =

From: Tatsuo Ishii <t-ishii(at)sra(dot)co(dot)jp>
To: rees(at)ddcom(dot)co(dot)jp
Cc: pgsql-general(at)postgresql(dot)org, david(at)kineticode(dot)com
Subject: Re: UTF-8 and LIKE vs =
Date: 2004-08-24 06:47:18
Message-ID: 20040824.154718.10295780.t-ishii@sra.co.jp (view raw or flat)
Thread:
Lists: pgsql-general
> Just want to check this --
> 
> > > > > The following should end up posted as shift-JIS, but
> > > > >
> > > > > テスト
> > > > > and
> > > > > てすと
> > > > >
> > > > > should collate the same under some contexts, since it's more-or-less
> > > > > equivalent to a variation in case.
> > > > 
> > > > Do you mean if you search for
> > > > 
> > > >    SELECT * FROM keyword where name = 'テスト';
> > > > 
> > > > You might expect it to return a row with name set to 'てすと'?
> > > 
> > > If the locale machinery iw functioning correctly (and if I understand
> > > correctly), there ought to be a setting that would allow those to
> > > collate to the same point. 
> > > 
> > > I'm not sure what the settings would be, or if it's fully funtional yet.
> > > Maybe Tatsuo would know? (Hope he doesn't mind me CC-ing him.)
> > 
> > I'm not sure what the point of the original question was, but I know 
> > that
> > 
> > 	SELECT * FROM keyword where name = 'テスト';
> > 
> > should work if locale = C and encoding is either EUC_JP or UTF-8 on my
> > standard Linux box (of course I did initdb --no-locale).
> 
> (query is katakana)
> 
>     SELECT * FROM keyword where name = 'テスト';
> 
> 
> returns a record whose name field is 'てすと' (hiragana)?
> 
> Doesn't this require some LC_COLLATE flag?

No. 

> (I suppose I should try this myself.)

Actually there's a similar regression test case in
src/test/mb/sql/euc_jp.sql(expected result is
src/test/mb/expected/euc_jp.sql).
--
Tatsuo Ishii

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