Update messages, comments and documentation for materialized views.

All instances of the verbiage lagging the code.  Back-patch to 9.3,
where materialized views were introduced.

src/backend/commands/comment.c

@@ -98,7 +98,7 @@ CommentObject(CommentStmt *stmt)
 				relation->rd_rel->relkind != RELKIND_FOREIGN_TABLE)
 				ereport(ERROR,
 						(errcode(ERRCODE_WRONG_OBJECT_TYPE),
-						 errmsg("\"%s\" is not a table, view, composite type, or foreign table",
+						 errmsg("\"%s\" is not a table, view, materialized view, composite type, or foreign table",
 								RelationGetRelationName(relation))));
 			break;
 		default:

src/backend/commands/indexcmds.c

@@ -372,7 +372,7 @@ DefineIndex(IndexStmt *stmt,
 		else
 			ereport(ERROR,
 					(errcode(ERRCODE_WRONG_OBJECT_TYPE),
-					 errmsg("\"%s\" is not a table",
+					 errmsg("\"%s\" is not a table or materialized view",
 							RelationGetRelationName(rel))));
 	}
 
@@ -1834,8 +1834,8 @@ ReindexDatabase(const char *databaseName, bool do_system, bool do_user)
 	/*
 	 * Scan pg_class to build a list of the relations we need to reindex.
 	 *
-	 * We only consider plain relations here (toast rels will be processed
-	 * indirectly by reindex_relation).
+	 * We only consider plain relations and materialized views here (toast
+	 * rels will be processed indirectly by reindex_relation).
 	 */
 	relationRelation = heap_open(RelationRelationId, AccessShareLock);
 	scan = heap_beginscan(relationRelation, SnapshotNow, 0, NULL);

src/backend/commands/seclabel.c

@@ -111,7 +111,7 @@ ExecSecLabelStmt(SecLabelStmt *stmt)
 				relation->rd_rel->relkind != RELKIND_FOREIGN_TABLE)
 				ereport(ERROR,
 						(errcode(ERRCODE_WRONG_OBJECT_TYPE),
-						 errmsg("\"%s\" is not a table, view, composite type, or foreign table",
+						 errmsg("\"%s\" is not a table, view, materialized view, composite type, or foreign table",
 								RelationGetRelationName(relation))));
 			break;
 		default:

src/backend/commands/tablecmds.c

@@ -10536,7 +10536,7 @@ RangeVarCallbackForAlterRelation(const RangeVar *rv, Oid relid, Oid oldrelid,
 		relkind != RELKIND_FOREIGN_TABLE)
 		ereport(ERROR,
 				(errcode(ERRCODE_WRONG_OBJECT_TYPE),
-			errmsg("\"%s\" is not a table, view, sequence, or foreign table",
+			errmsg("\"%s\" is not a table, view, materialized view, sequence, or foreign table",
 				   rv->relname)));
 
 	ReleaseSysCache(tuple);

src/backend/commands/typecmds.c

@@ -2813,7 +2813,14 @@ get_rels_with_domain(Oid domainOid, LOCKMODE lockmode)
 												 NULL,
 												 format_type_be(domainOid));
 
-			/* Otherwise we can ignore views, composite types, etc */
+			/*
+			 * Otherwise, we can ignore relations except those with both
+			 * storage and user-chosen column types.
+			 *
+			 * XXX If an index-only scan could satisfy "col::some_domain" from
+			 * a suitable expression index, this should also check expression
+			 * index columns.
+			 */
 			if (rel->rd_rel->relkind != RELKIND_RELATION &&
 				rel->rd_rel->relkind != RELKIND_MATVIEW)
 			{

src/backend/commands/vacuum.c

@@ -742,8 +742,8 @@ vac_update_datfrozenxid(void)
 		Form_pg_class classForm = (Form_pg_class) GETSTRUCT(classTup);
 
 		/*
-		 * Only consider heap and TOAST tables (anything else should have
-		 * InvalidTransactionId in relfrozenxid anyway.)
+		 * Only consider relations able to hold unfrozen XIDs (anything else
+		 * should have InvalidTransactionId in relfrozenxid anyway.)
 		 */
 		if (classForm->relkind != RELKIND_RELATION &&
 			classForm->relkind != RELKIND_MATVIEW &&
@@ -1044,7 +1044,7 @@ vacuum_rel(Oid relid, VacuumStmt *vacstmt, bool do_toast, bool for_wraparound)
 	}
 
 	/*
-	 * Check that it's a vacuumable table; we used to do this in
+	 * Check that it's a vacuumable relation; we used to do this in
 	 * get_rel_oids() but seems safer to check after we've locked the
 	 * relation.
 	 */