Produce a somewhat-useful error message, namely

ERROR:  Cannot display a value of type RECORD
rather than a random integer when someone tries to SELECT a tuple
value.  Per pghackers discussion around 26-May-02.

src/backend/catalog/heap.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/catalog/heap.c,v 1.222 2002/08/29 00:17:02 tgl Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/catalog/heap.c,v 1.223 2002/08/29 04:38:04 tgl Exp $
  *
  *
  * INTERFACE ROUTINES
@@ -623,6 +623,12 @@ AddNewRelationType(const char *typeName,
 				   Oid new_type_oid)
 {
 	/*
+	 * We set the I/O procedures of a complex type to record_in and
+	 * record_out, so that a user will get an error message not a weird
+	 * number if he tries to SELECT a complex type.
+	 *
+	 * OLD and probably obsolete comments:
+	 *
 	 * The sizes are set to oid size because it makes implementing sets
 	 * MUCH easier, and no one (we hope) uses these fields to figure out
 	 * how much space to allocate for the type. An oid is the type used
@@ -639,8 +645,8 @@ AddNewRelationType(const char *typeName,
 			   sizeof(Oid),		/* internal size */
 			   'c',				/* type-type (complex) */
 			   ',',				/* default array delimiter */
-			   F_OIDIN,			/* input procedure */
-			   F_OIDOUT,		/* output procedure */
+			   F_RECORD_IN,		/* input procedure */
+			   F_RECORD_OUT,	/* output procedure */
 			   InvalidOid,		/* array element type - irrelevant */
 			   InvalidOid,		/* domain base type - irrelevant */
 			   NULL,			/* default type value - none */

src/include/catalog/pg_type.h

@@ -8,7 +8,7 @@
  * Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $Id: pg_type.h,v 1.131 2002/08/29 00:17:06 tgl Exp $
+ * $Id: pg_type.h,v 1.132 2002/08/29 04:38:04 tgl Exp $
  *
  * NOTES
  *	  the genbki.sh script reads this file and generates .bki
@@ -296,13 +296,13 @@ DESCR("array of INDEX_MAX_KEYS oids, used in system tables");
 DATA(insert OID = 32 (	SET		   PGNSP PGUID -1 f b t \054 0   0 unknownin unknownout i p f 0 -1 0 _null_ _null_ ));
 DESCR("set of tuples");
 
-DATA(insert OID = 71 (	pg_type		 PGNSP PGUID 4 t c t \054 1247 0 int4in int4out i p f 0 -1 0 _null_ _null_ ));
-DATA(insert OID = 75 (	pg_attribute PGNSP PGUID 4 t c t \054 1249 0 int4in int4out i p f 0 -1 0 _null_ _null_ ));
-DATA(insert OID = 81 (	pg_proc		 PGNSP PGUID 4 t c t \054 1255 0 int4in int4out i p f 0 -1 0 _null_ _null_ ));
-DATA(insert OID = 83 (	pg_class	 PGNSP PGUID 4 t c t \054 1259 0 int4in int4out i p f 0 -1 0 _null_ _null_ ));
-DATA(insert OID = 86 (	pg_shadow	 PGNSP PGUID 4 t c t \054 1260 0 int4in int4out i p f 0 -1 0 _null_ _null_ ));
-DATA(insert OID = 87 (	pg_group	 PGNSP PGUID 4 t c t \054 1261 0 int4in int4out i p f 0 -1 0 _null_ _null_ ));
-DATA(insert OID = 88 (	pg_database  PGNSP PGUID 4 t c t \054 1262 0 int4in int4out i p f 0 -1 0 _null_ _null_ ));
+DATA(insert OID = 71 (	pg_type		 PGNSP PGUID 4 t c t \054 1247 0 record_in record_out i p f 0 -1 0 _null_ _null_ ));
+DATA(insert OID = 75 (	pg_attribute PGNSP PGUID 4 t c t \054 1249 0 record_in record_out i p f 0 -1 0 _null_ _null_ ));
+DATA(insert OID = 81 (	pg_proc		 PGNSP PGUID 4 t c t \054 1255 0 record_in record_out i p f 0 -1 0 _null_ _null_ ));
+DATA(insert OID = 83 (	pg_class	 PGNSP PGUID 4 t c t \054 1259 0 record_in record_out i p f 0 -1 0 _null_ _null_ ));
+DATA(insert OID = 86 (	pg_shadow	 PGNSP PGUID 4 t c t \054 1260 0 record_in record_out i p f 0 -1 0 _null_ _null_ ));
+DATA(insert OID = 87 (	pg_group	 PGNSP PGUID 4 t c t \054 1261 0 record_in record_out i p f 0 -1 0 _null_ _null_ ));
+DATA(insert OID = 88 (	pg_database  PGNSP PGUID 4 t c t \054 1262 0 record_in record_out i p f 0 -1 0 _null_ _null_ ));
 
 /* OIDS 100 - 199 */