On 10/15/21 19:42, Ron wrote:
The numeric ranges 0-10 and 10-19 overlap, just as the time ranges
00:01:00-00:00:02:00 overlaps 00:02:00-00:03:00.
*It's the programmer's responsibility* to say what s/he really means,
not for "the system" to make that choice.
It is the programmers choice:
--The canonical form.
--No overlap
select int4range(1,3), int4range(3, 5);
int4range | int4range
-----------+-----------
[1,3) | [3,5)
select int4range(1,3) && int4range(3, 5);
?column?
----------
f
--Making it overlap
select int4range(1,3, '[]'), int4range(3, 5, '[]');
int4range | int4range
-----------+-----------
[1,4) | [3,6)
select int4range(1,3, '[]') && int4range(3, 5, '[]');
?column?
----------
t
There is no straight time range, you would have to use tsrange or
tstzrange. The principle still holds though you can make ranges overlap
or not depending on '[)' or '[]'.
--
Adrian Klaver
adrian.klaver@xxxxxxxxxxx
