On Fri, Jun 30, 2017 at 1:36 PM, Amit Langote
<Langote_Amit_f8@lab.ntt.co.jp> wrote:
>
> Alright, I spent some time implementing a patch to allow specifying
> -infinity and +infinity in arbitrary ways. Of course, it prevents
> nonsensical inputs with appropriate error messages.
I don't think -infinity and +infinity are the right terms. For a
string or character data type there is no -infinity and +infinity.
Similarly for enums. We need to extend UNBOUNDED somehow to indicate
the end of a given type in the given direction. I thought about
UNBOUNDED LEFT/RIGHT but then whether LEFT indicates -ve side or +side
would cause confusion. Also LEFT/RIGHT may work for a single
dimensional datatype but not for multi-dimensional spaces. How about
MINIMUM/MAXIMUM or UNBOUNDED MIN/MAX to indicate the extremities.
--
Best Wishes,
Ashutosh Bapat
EnterpriseDB Corporation
The Postgres Database Company