From: Robert Haas <robertmhaas@gmail.com>
> I think it would be better to have read-write and read-only check
> trnasaction_read_only, and primary and standby can check the new
> thing. There can never be any real advantage in having synonyms for
> the same thing, but there can be an advantage to letting users choose
> the behavior they want.
+1
"primary" is not always equal to "read-write". When normal users are only allowed to query data on a logically
replicateddatabase (ALTER USER SET default_transaction_read_only = on), it's the primary read-only server.
Regards
Takayuki Tsunakawa
