Without this, an extension containing an access method is not properly dumped/restored during pg_upgrade --- the AM ends up not being a member of the extension after upgrading.
Another oversight in commit 473b93287, reported by Andrew Dunstan.
Report:
e8bdee2 Add ALTER EXTENSION ADD/DROP ACCESS METHOD, and use it in pg_upgrade.
doc/src/sgml/ref/alter_extension.sgml | 1 +
src/backend/parser/gram.y | 11 ++++++++++-
src/bin/pg_dump/pg_dump.c | 3 +++
3 files changed, 14 insertions(+), 1 deletion(-)
Upstream: git.postgresql.org