Some RELKIND macro refactoring

Add more macros to group some RELKIND_* macros:

- RELKIND_HAS_PARTITIONS()
- RELKIND_HAS_TABLESPACE()
- RELKIND_HAS_TABLE_AM()

Reviewed-by: Michael Paquier <michael@paquier.xyz>
Reviewed-by: Alvaro Herrera <alvherre@alvh.no-ip.org>
Discussion: https://www.postgresql.org/message-id/flat/a574c8f1-9c84-93ad-a9e5-65233d6fc00f%40enterprisedb.com

contrib/amcheck/verify_heapam.c

@@ -306,9 +306,7 @@ verify_heapam(PG_FUNCTION_ARGS)
 	/*
 	 * Check that a relation's relkind and access method are both supported.
 	 */
-	if (ctx.rel->rd_rel->relkind != RELKIND_RELATION &&
-		ctx.rel->rd_rel->relkind != RELKIND_MATVIEW &&
-		ctx.rel->rd_rel->relkind != RELKIND_TOASTVALUE &&
+	if (!RELKIND_HAS_TABLE_AM(ctx.rel->rd_rel->relkind) &&
 		ctx.rel->rd_rel->relkind != RELKIND_SEQUENCE)
 		ereport(ERROR,
 				(errcode(ERRCODE_WRONG_OBJECT_TYPE),

contrib/pg_surgery/heap_surgery.c

@@ -103,9 +103,7 @@ heap_force_common(FunctionCallInfo fcinfo, HeapTupleForceOption heap_force_opt)
 	/*
 	 * Check target relation.
 	 */
-	if (rel->rd_rel->relkind != RELKIND_RELATION &&
-		rel->rd_rel->relkind != RELKIND_MATVIEW &&
-		rel->rd_rel->relkind != RELKIND_TOASTVALUE)
+	if (!RELKIND_HAS_TABLE_AM(rel->rd_rel->relkind))
 		ereport(ERROR,
 				(errcode(ERRCODE_WRONG_OBJECT_TYPE),
 				 errmsg("cannot operate on relation \"%s\"",

contrib/pg_visibility/pg_visibility.c

@@ -776,9 +776,7 @@ tuple_all_visible(HeapTuple tup, TransactionId OldestXmin, Buffer buffer)
 static void
 check_relation_relkind(Relation rel)
 {
-	if (rel->rd_rel->relkind != RELKIND_RELATION &&
-		rel->rd_rel->relkind != RELKIND_MATVIEW &&
-		rel->rd_rel->relkind != RELKIND_TOASTVALUE)
+	if (!RELKIND_HAS_TABLE_AM(rel->rd_rel->relkind))
 		ereport(ERROR,
 				(errcode(ERRCODE_WRONG_OBJECT_TYPE),
 				 errmsg("relation \"%s\" is of wrong relation kind",

contrib/pgstattuple/pgstattuple.c

@@ -252,14 +252,13 @@ pgstat_relation(Relation rel, FunctionCallInfo fcinfo)
 				(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
 				 errmsg("cannot access temporary tables of other sessions")));
 
-	switch (rel->rd_rel->relkind)
+	if (RELKIND_HAS_TABLE_AM(rel->rd_rel->relkind) ||
+		rel->rd_rel->relkind == RELKIND_SEQUENCE)
 	{
-		case RELKIND_RELATION:
-		case RELKIND_MATVIEW:
-		case RELKIND_TOASTVALUE:
-		case RELKIND_SEQUENCE:
 			return pgstat_heap(rel, fcinfo);
-		case RELKIND_INDEX:
+	}
+	else if (rel->rd_rel->relkind == RELKIND_INDEX)
+	{
 			switch (rel->rd_rel->relam)
 			{
 				case BTREE_AM_OID:
@@ -288,9 +287,9 @@ pgstat_relation(Relation rel, FunctionCallInfo fcinfo)
 					(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
 					 errmsg("index \"%s\" (%s) is not supported",
 							RelationGetRelationName(rel), err)));
-			break;
-
-		default:
+	}
+	else
+	{
 			ereport(ERROR,
 					(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
 					 errmsg("cannot get tuple-level statistics for relation \"%s\"",