hi!
the only place I managed to find where time ranges are mentioned is
"pgbuilti"n man pages:
================
TIME RANGES
Time ranges are specified as:
[ 'abstime' 'abstime']
where abstime is a time in the absolute time format. Special
abstime
values such as "current", "infinity" and "-infinity" can be used.
============================
So, the question is: how can one use them
Thanks
Aleksey