diff --git a/src/backend/commands/copy.c b/src/backend/commands/copy.c
index 12ee1c28f1..6dd610cba2 100644
--- a/src/backend/commands/copy.c
+++ b/src/backend/commands/copy.c
@@ -6,7 +6,7 @@
  *
  *
  * IDENTIFICATION
- *    $Header: /cvsroot/pgsql/src/backend/commands/copy.c,v 1.22 1997/03/12 20:47:32 scrappy Exp $
+ *    $Header: /cvsroot/pgsql/src/backend/commands/copy.c,v 1.23 1997/04/02 03:57:03 vadim Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -119,6 +119,8 @@ DoCopy(char *relname, bool binary, bool oids, bool from, bool pipe,
         /* Above should not return. */
     else {
         if (from) {  /* copy from file to database */
+	    if ( rel->rd_rel->relkind == RELKIND_SEQUENCE )
+	    	elog (WARN, "You can't change sequence relation %s", relname);
             if (pipe) {
                 if (IsUnderPostmaster) {
                     ReceiveCopyBegin();
diff --git a/src/backend/commands/creatinh.c b/src/backend/commands/creatinh.c
index 88140241d1..696bd22e7c 100644
--- a/src/backend/commands/creatinh.c
+++ b/src/backend/commands/creatinh.c
@@ -7,7 +7,7 @@
  *
  *
  * IDENTIFICATION
- *    $Header: /cvsroot/pgsql/src/backend/commands/Attic/creatinh.c,v 1.5 1997/01/10 20:17:11 momjian Exp $
+ *    $Header: /cvsroot/pgsql/src/backend/commands/Attic/creatinh.c,v 1.6 1997/04/02 03:57:06 vadim Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -264,6 +264,11 @@ MergeAttributes(List *schema, List *supers)
 		 "MergeAttr: Can't inherit from non-existent superclass '%s'",
 		 name);
 	}
+	if ( relation->rd_rel->relkind == 'S' )
+	{
+	    elog(WARN, "MergeAttr: Can't inherit from sequence superclass '%s'",
+		 name);
+	}
 	tupleDesc = RelationGetTupleDescriptor(relation);
 	
 	for (attrno = relation->rd_rel->relnatts - 1; attrno >= 0; attrno--) {