Wang Yan 39bdd7b506
pg upgrade failure handling (#14934)
To ensure the upgrade execution idempotence, it needs to clean the $PGDATANEW on pg_upgrade failure.
Otherwise, the upgrade will skip the upgrade process from the second time launch as the exist of $PGDATANEW.

Signed-off-by: Wang Yan <wangyan@vmware.com>
2021-05-21 13:53:39 +08:00
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