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We'd try to drop the partitions of a partitioned index separately, which is disallowed by the backend, leading to an error during restore. While the error is harmless, it causes problems if you try to use --single-transaction mode. Fortunately, there seems no need to do a DROP at all, since the partition will go away silently when we drop either the parent index or the partition's table. So just make the DROP conditional on not being a partition. Reported-by: jian he <jian.universality@gmail.com> Author: jian he <jian.universality@gmail.com> Reviewed-by: Pavel Stehule <pavel.stehule@gmail.com> Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us> Discussion: https://postgr.es/m/CACJufxF0QSdkjFKF4di-JGWN6CSdQYEAhGPmQJJCdkSZtd=oLg@mail.gmail.com Backpatch-through: 13