Re: unaccent module - two params function should be immutable

2013/9/11 Bruce Momjian <bruce(at)momjian(dot)us>

> On Tue, Feb 19, 2013 at 08:30:29AM +0100, Pavel Stehule wrote:
> > Hello
> >
> > There was a proposal to change flag of function to immutable - should
> > be used in indexes
> >
> > CREATE FUNCTION unaccent(regdictionary, text)
> > RETURNS text
> > AS 'MODULE_PATHNAME', 'unaccent_dict'
> > LANGUAGE C STABLE STRICT;
> >
> >
> > is there any progress?
>
> I have developed the attached patch based on your suggestion. I did not
> see anything in the code that would make it STABLE, except a lookup of a
> dictionary library:
>
> dictOid = get_ts_dict_oid(stringToQualifiedNameList("unaccent"),
> false);
>

yes, it risk, but similar is with timezones, and other external data.

Regards

Pavel

>
> --
> Bruce Momjian <bruce(at)momjian(dot)us> http://momjian.us
> EnterpriseDB http://enterprisedb.com
>
> + It's impossible for everything to be true. +
>