empty range

Hello,

default constructor for ranges use lower bound closed '[' and upper bound
open ')'. This is correct behavior, but when upper bound is same like
lower bound then range is empty. Mathematically is correct again - but in
database is lost information about range bounds (lower/upper is NULL). To
prevent this sitiuation we must have check if lower and upper argument is
same and add some 0.00001s to upper range or use another constructor like
tstzrange(now(),now(),'[]') .

Is there chance to change behavior of storing ranges? Its possible store
range bounds in internal structure and lower(tstzrange(now(),now())) show
not NULL value or change default behavior
tstzrange(timestamptz,timestamptz) - if both args are same, then store as
'[]', else '[)' and only tstzrange(timestamptz,timestamtz,'[)') and
tstzrange(timestamptz,timestamtz,'()') store empty range.

It's only suggestion, i don't now if somebody wants store empty range
without bounds.

We must have some checks to prevent storing empty values on every place
where can occur this empty range, becouse we don't want lose bound
information.

Best regards,
--
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Ing. David TUROŇ
LinuxBox.cz, s.r.o.
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