Hi John,
By looking at timestamptz_bin() implementation I don't see why it
should be STABLE. Its return value depends only on the input values.
It doesn't look at the session parameters. timestamptz_in() and
timestamptz_out() are STABLE, that's true, but this is no concern of
timestamptz_bin().
Am I missing something?
--
Best regards,
Aleksander Alekseev