Re: BUG #13440: unaccent does not remove all diacritics

On 2015-06-18 15:30:46 -0400, Tom Lane wrote:
> Yeah, if we do anything other than adding new mappings, I suspect that
> part could not be back-patched.  Maybe adding new mappings shouldn't
> be back-patched either, though it seems relatively safe to me.

Hm. Why is it safe to add new mappings? If previously something has been
indexed with accents because unaccent didn't remove them and you're now
adding a new mapping to unaccent, the tsearch query will lookup the
wrong key (with accents removed)?

Greetings,

Andres Freund