Hello Tatsuo-san,
So I think adding "freeze" to the copy statement should only happen in
PostgreSQL 14 or later. Probably the test should be
"PQserverVersion() >= 140000" I think. Attached is the patch doing
what you suggest.
I have created a CommitFest entry for this.
https://commitfest.postgresql.org/33/3034/
My 0.02 €
After giving it some thought, ISTM that there could also be a performance
improvement with copy freeze from older version, so I'd suggest to add it
after 9.3 where the option was added, i.e. 90300.
Also, I do not think it is worth to fail on a 0 pqserverversion, just keep
the number and consider it a very old version?
Question: should there be a word about copy using the freeze option? I'd
say yes, in the section describing "g".
--
Fabien.
