> > Use a simple wrap function.
>
> How knows this function to/from encoding?
For example you want to define a function for LATIN1 to UNICODE conversion
function would look like:
function_for_LATIN1_to_UTF-8(from_string opaque, to_string opaque, length
integer)
{::generic_function_using_iconv(from_str, to_str, "ISO-8859-1", "UTF-8",length);
}
CREATE FUNCTION function_for_LATIN1_to_UTF-8(opaque, opaque, integer)
RETURNS integer;
CREAE CONVERSION myconversion FOR 'LATIN1' TO 'UNICODE' FROM
function_for_LATIN1_to_UTF-8;