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a98f01c933
4b8266415 added a precheck to pgrowlocks() to ensure the given object's pg_class.relam is HEAP_TABLE_AM_OID, however, that check was put before another check which was checking if the given object was a partitioned table. Since the pg_class.relam is always InvalidOid for partitioned tables, if pgrowlocks() was called passing a partitioned table, then the "only heap AM is supported" error would be raised instead of the intended error about the given object being a partitioned table. Here we simply move the pg_class.relam check to after the check that verifies that we are in fact working with a normal (non-partitioned) table. Reported-by: jian he Discussion: https://postgr.es/m/CACJufxFaSp_WguFCf0X98951zFVX+dXFnF1mxAb-G3g1HiHOow@mail.gmail.com Backpatch-through: 12, where 4b8266415 was introduced.