Hello,
the issue can be show with this example:
piro=> SET TIMEZONE = 'America/New_York';
SET
piro=> select '1970-01-01T00:00:00+03:00'::timestamp;
timestamp
---------------------
1970-01-01 00:00:00
(1 row)
piro=> select '1970-01-01T00:00:00+03:00'::timestamptz::timestamp;
timestamp
---------------------
1969-12-31 16:00:00
(1 row)
I find surprising that an unknown literal containing a TZ-aware
timestamp has the tz info discarded (e.g. upon insertion in a
timestamp without time zone field), whereas the cast from tz-aware to
non-tz-aware performs a conversion. I find the second behaviour much
more reasonable.
Is there an explanation for the first behaviour?
Is the first behaviour documented?
Thank you very much,
-- Daniele
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