Re: [HACKERS] psql and pg_dump using obselete copy commands

[Christopher Kings-Lynne]

Oh, if we do that, do we disallow connecting to older servers?
Not at all, since the logic would be like this:
if we have new copy functions
  and we have protocol version function
    and protocol version >= 3
      then use new copy functions
else
  use old copy functions
That would be even simpler if someone would answer my question about the 
new copy functions working on a pre v3 server.  (I'm setting up to test 
that atm)

Chris
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TIP 9: the planner will ignore your desire to choose an index scan if your
     joining column's datatypes do not match