diff --git a/src/bin/pg_dump/pg_backup.h b/src/bin/pg_dump/pg_backup.h
index 2a5cd66ca8..97941fa3fd 100644
--- a/src/bin/pg_dump/pg_backup.h
+++ b/src/bin/pg_dump/pg_backup.h
@@ -199,8 +199,6 @@ typedef struct Archive
 	int			minRemoteVersion;	/* allowable range */
 	int			maxRemoteVersion;
 
-	bool		hasGenericLockTable;	/* can LOCK TABLE do non-table rels */
-
 	int			numWorkers;		/* number of parallel processes */
 	char	   *sync_snapshot_id;	/* sync snapshot id for parallel operation */
 
diff --git a/src/bin/pg_dump/pg_backup_db.c b/src/bin/pg_dump/pg_backup_db.c
index 590a5055f3..61f7453e63 100644
--- a/src/bin/pg_dump/pg_backup_db.c
+++ b/src/bin/pg_dump/pg_backup_db.c
@@ -534,72 +534,6 @@ EndDBCopyMode(Archive *AHX, const char *tocEntryTag)
 	}
 }
 
-/*
- * Does LOCK TABLE work on non-table relations on this server?
- *
- * Note: assumes it is called out of any transaction
- */
-bool
-IsLockTableGeneric(Archive *AHX)
-{
-	ArchiveHandle *AH = (ArchiveHandle *) AHX;
-	PGresult   *res;
-	char	   *sqlstate;
-	bool		retval;
-
-	if (AHX->remoteVersion >= 140000)
-		return true;
-	else if (AHX->remoteVersion < 90500)
-		return false;
-
-	StartTransaction(AHX);
-
-	/*
-	 * Try a LOCK TABLE on a well-known non-table catalog; WRONG_OBJECT_TYPE
-	 * tells us that this server doesn't support locking non-table rels, while
-	 * LOCK_NOT_AVAILABLE and INSUFFICIENT_PRIVILEGE tell us that it does.
-	 * Report anything else as a fatal problem.
-	 */
-#define ERRCODE_INSUFFICIENT_PRIVILEGE	"42501"
-#define ERRCODE_WRONG_OBJECT_TYPE	"42809"
-#define ERRCODE_LOCK_NOT_AVAILABLE	"55P03"
-	res = PQexec(AH->connection,
-				 "LOCK TABLE pg_catalog.pg_class_tblspc_relfilenode_index IN ACCESS SHARE MODE NOWAIT");
-	switch (PQresultStatus(res))
-	{
-		case PGRES_COMMAND_OK:
-			retval = true;
-			break;
-		case PGRES_FATAL_ERROR:
-			sqlstate = PQresultErrorField(res, PG_DIAG_SQLSTATE);
-			if (sqlstate &&
-				strcmp(sqlstate, ERRCODE_WRONG_OBJECT_TYPE) == 0)
-			{
-				retval = false;
-				break;
-			}
-			else if (sqlstate &&
-					 (strcmp(sqlstate, ERRCODE_LOCK_NOT_AVAILABLE) == 0 ||
-					  strcmp(sqlstate, ERRCODE_INSUFFICIENT_PRIVILEGE) == 0))
-			{
-				retval = true;
-				break;
-			}
-			/* else, falls through */
-		default:
-			warn_or_exit_horribly(AH, "LOCK TABLE failed for \"%s\": %s",
-								  "pg_catalog.pg_class_tblspc_relfilenode_index",
-								  PQerrorMessage(AH->connection));
-			retval = false;		/* not reached */
-			break;
-	}
-	PQclear(res);
-
-	CommitTransaction(AHX);
-
-	return retval;
-}
-
 void
 StartTransaction(Archive *AHX)
 {
diff --git a/src/bin/pg_dump/pg_backup_db.h b/src/bin/pg_dump/pg_backup_db.h
index 355beec1f7..8888dd34b9 100644
--- a/src/bin/pg_dump/pg_backup_db.h
+++ b/src/bin/pg_dump/pg_backup_db.h
@@ -20,8 +20,6 @@ extern PGresult *ExecuteSqlQueryForSingleRow(Archive *fout, const char *query);
 
 extern void EndDBCopyMode(Archive *AHX, const char *tocEntryTag);
 
-extern bool IsLockTableGeneric(Archive *AHX);
-
 extern void StartTransaction(Archive *AHX);
 extern void CommitTransaction(Archive *AHX);
 
diff --git a/src/bin/pg_dump/pg_dump.c b/src/bin/pg_dump/pg_dump.c
index 081f5be7dd..bce8d54af3 100644
--- a/src/bin/pg_dump/pg_dump.c
+++ b/src/bin/pg_dump/pg_dump.c
@@ -1168,9 +1168,6 @@ setup_connection(Archive *AH, const char *dumpencoding,
 			ExecuteSqlStatement(AH, "SET row_security = off");
 	}
 
-	/* Detect whether LOCK TABLE can handle non-table relations */
-	AH->hasGenericLockTable = IsLockTableGeneric(AH);
-
 	/*
 	 * Start transaction-snapshot mode transaction to dump consistent data.
 	 */
@@ -6730,16 +6727,16 @@ getTables(Archive *fout, int *numTables)
 		 * assume our lock on the child is enough to prevent schema
 		 * alterations to parent tables.
 		 *
-		 * We only need to lock the relation for certain components; see
-		 * pg_dump.h
+		 * NOTE: it'd be kinda nice to lock other relations too, not only
+		 * plain or partitioned tables, but the backend doesn't presently
+		 * allow that.
 		 *
-		 * On server versions that support it, we lock all relations not just
-		 * plain tables.
+		 * We only need to lock the table for certain components; see
+		 * pg_dump.h
 		 */
 		if (tblinfo[i].dobj.dump &&
-			(fout->hasGenericLockTable ||
-			 tblinfo[i].relkind == RELKIND_PARTITIONED_TABLE ||
-			 tblinfo[i].relkind == RELKIND_RELATION) &&
+			(tblinfo[i].relkind == RELKIND_RELATION ||
+			 tblinfo->relkind == RELKIND_PARTITIONED_TABLE) &&
 			(tblinfo[i].dobj.dump & DUMP_COMPONENTS_REQUIRING_LOCK))
 		{
 			resetPQExpBuffer(query);