[tarantool-patches] Re: [PATCH 2/3] Add surrogate ID for BINARY collation

[Vladislav Shpilevoy]

On 01/11/2018 14:37, Konstantin Osipov wrote:
> * n.pettik <korablev at tarantool.org> [18/10/31 18:52]:
> 
> Sorry for a last-minute comment, but is there any reason why id
> has to be  4294967294? Why not use the next spare id, it's 3
> AFAIR?


I guess, because

1) It is not real collation and is not presented in
_collation. So for a user it would be strange to see
a gap between 2 and 4 in _collation, which can not be
set.

2) Some advanced users could already create their own
collations, so 3 may be occupied.

3) Actually binary collation == no collation and it
is consistent to has its ID near COLL_NONE, in a "special
range" of collation identifiers.