Re: [HACKERS] create operator problem - Mailing list pgsql-hackers

From Bruce Momjian
Subject Re: [HACKERS] create operator problem
Date
Msg-id 199804252207.SAA14984@candle.pha.pa.us
Whole thread Raw
In response to create operator problem  ("Vazsonyi Peter[ke]" <neko@kornel.szif.hu>)
List 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('JEn�ke','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 ~~.

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