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Re: [HACKERS] create operator problem

From: Bruce Momjian <maillist(at)candle(dot)pha(dot)pa(dot)us>
To: neko(at)kornel(dot)szif(dot)hu (Vazsonyi Peter[ke])
Cc: pgsql-hackers(at)postgreSQL(dot)org
Subject: Re: [HACKERS] create operator problem
Date: 1998-04-25 22:07:31
Message-ID: 199804252207.SAA14984@candle.pha.pa.us (view raw or flat)
Thread:
Lists: pgsql-hackers
> 
> Hello!
> 
> I use an external function in postgres and here i try create operator for
> like with regional character support ::
> 
> -----< Cut begin
> create function mylike(text,text) returns bool
> as '/home/vip/neko/tudakozo/comp.so' language 'c';
> CREATE
> select mylike('Jeno','Jen'),mylike('aJenO','Jen'),mylike('fJeNof','Jen'),
>        mylike('JEnke','Jen');
> mylike|mylike|mylike|mylike
> ------+------+------+------
> t     |t     |t     |t
> (1 row)
> 
> select 'f:', mylike('asd','fds');
> ?column?|mylike
> --------+------
> f:      |f
> (1 row)
> 
> -- It works
> 
> drop operator ~~ (text,text);
> DROP
> create operator ~~ (leftarg=text,rightarg=text,procedure=mylike);
> CREATE
> select 'this will be true'::text ~~ 'true';
> ?column?
> --------
> f
> (1 row)
> -- it seems not ;(
> -----< Cut end
> 
> I'm not a realy postgres guru, but whith postgres 6.2 can i use this
> function as operator too. If that was a bug, this letter is a bug report,
> but if it isn't please help me!  The used postgres's vn: 6.3-2, it runs on a
> linux (RH4.2;i386 + updates)

We overload ~~ to allow indexing of LIKE operations.  Sorry.  I will add
something to error on redefine of ~~.

-- 
Bruce Momjian                          |  830 Blythe Avenue
maillist(at)candle(dot)pha(dot)pa(dot)us              |  Drexel Hill, Pennsylvania 19026
  +  If your life is a hard drive,     |  (610) 353-9879(w)
  +  Christ can be your backup.        |  (610) 853-3000(h)

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