On 2014-02-10 17:35:12 -0600, Merlin Moncure wrote: > Wrong. You still need to have code that checks the server version and > see if it's supported (particularly for sending) and as there is *no > protocol negotiation of the formats at present it's all going to boil > down to if version = X do Y*. How does the server know which > 'versions' are ok to send? It doesn't. Follow along with me here: > Suppose we don't introduce a version flag today and change the format > to some more exotic structure for 9.5. How has the version flag made > things easier for the client? It hasn't. The client goes "if version > = X do Y".
think of binary COPY outputting data in 9.4 and then trying to import that data into 9.5. That's the interesting case here. > What about them? Are we now, at the > upteenth hour of the final commit fest, suddenly deciding that binary > wire formats going to be compatible across versions? It has been a concern before. Greetings, Andres Freund -- Andres Freund http://www.2ndQuadrant.com/ PostgreSQL Development, 24x7 Support, Training & Services -- Sent via pgsql-hackers mailing list (email@example.com) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers