Re: UNICODE and PL/PGSQL

On mán, 2006-11-27 at 15:54 +0100, Bart Degryse wrote:
> Hi gnari,
> I suppose your statement
> test=# select '\x'||'65';
> is done on some command line interface. I don't have that. I can only
> use some client program. I'm using EMS SQL Manager 2007 and pgAdmin
> III 1.3
> None of them accepts your statement.
> My point is that in my first version of the function ( charset :=
> charset || '\x65'; ) a unicode hex value for the letter e is stored
> in charset.

my point was that '\x65' as a literal
is read as 'e', but '\\x' || '65' is
just the concatation of 2 2-char varchars

> When I try to do the same for a range of hex values ( FOR i IN
> 101..101 LOOP charset := charset || '\x' || to_hex(i); )

you might be able to do what you want with
set_byte() and encode().

CREATE OR REPLACE FUNCTION myfunction()
RETURNS varchar AS
$x$
DECLARE x bytea := ' ';
BEGIN
FOR i in 101..105 LOOP
x:=set_byte(x,i-101,i);
END LOOP;
RETURN encode(x,''escape'');
END;
$x$
LANGUAGE 'plpgsql';

select myfunction();

gnari