Make renamerel take an OID, not a RangeVar, to identify the relation

to rename.  Avoids some corner-case bugs in cluster.c, improves
consistency with renameatt.

src/include/commands/rename.h

@@ -7,7 +7,7 @@
  * Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $Id: rename.h,v 1.15 2002/03/29 19:06:22 tgl Exp $
+ * $Id: rename.h,v 1.16 2002/03/31 07:49:30 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -15,11 +15,11 @@
 #define RENAME_H
 
 extern void renameatt(Oid relid,
-		  char *oldattname,
-		  char *newattname,
+		  const char *oldattname,
+		  const char *newattname,
 		  bool recurse);
 
-extern void renamerel(const RangeVar *relation,
+extern void renamerel(Oid relid,
 		  const char *newrelname);
 
 #endif   /* RENAME_H */