Hi Jian,
Thanks for the update.
I tried applying the v7 patch on current master (cbf9a72993e), but it
doesn't apply cleanly. Most of the patch applies, however there are
rejected hunks in src/backend/commands/copyfrom.c,
src/backend/commands/tablecmds.c, and the fast_default regression test
files.
Could you please check if the patch needs a rebase or if there is a
prerequisite patch?
Regards,
Solai