Refuse upgrades from pre-9.0 clusters
Commit 695b4a113ab added a dependency on retrieving oldestxid from
pg_control, which only exists in 9.0 and onwards, but the check for
8.4 as the oldest version was retained. Since there has been few if
any complaints of 8.4 upgrades not working, fix by setting 9.0 as
the oldest version supported rather than resurrecting 8.4 support.
Backpatch to all supported versions.
Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://postgr.es/m/1973418.1657040382@sss.pgh.pa.us
Backpatch-through: v12
Branch
------
REL_12_STABLE
Details
-------
https://git.postgresql.org/pg/commitdiff/bcd2be0c2f7e494597ad02a69127c82478369b07
Modified Files
--------------
doc/src/sgml/ref/pgupgrade.sgml | 2 +-
src/bin/pg_upgrade/check.c | 9 +++++++--
2 files changed, 8 insertions(+), 3 deletions(-)
