Cross-data-type comparisons are now indexable by btrees, pursuant to my

pghackers proposal of 8-Nov.  All the existing cross-type comparison
operators (int2/int4/int8 and float4/float8) have appropriate support.
The original proposal of storing the right-hand-side datatype as part of
the primary key for pg_amop and pg_amproc got modified a bit in the event;
it is easier to store zero as the 'default' case and only store a nonzero
when the operator is actually cross-type.  Along the way, remove the
long-since-defunct bigbox_ops operator class.

src/backend/utils/cache/syscache.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/utils/cache/syscache.c,v 1.91 2003/09/24 18:54:01 tgl Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/utils/cache/syscache.c,v 1.92 2003/11/12 21:15:56 tgl Exp $
  *
  * NOTES
  *	  These routines allow the parser/planner/executor to perform
@@ -136,21 +136,21 @@ static const struct cachedesc cacheinfo[] = {
 	{AccessMethodOperatorRelationName,	/* AMOPSTRATEGY */
 		AccessMethodStrategyIndex,
 		0,
-		2,
+		3,
 		{
 			Anum_pg_amop_amopclaid,
+			Anum_pg_amop_amopsubtype,
 			Anum_pg_amop_amopstrategy,
-			0,
 			0
 	}},
 	{AccessMethodProcedureRelationName, /* AMPROCNUM */
 		AccessMethodProcedureIndex,
 		0,
-		2,
+		3,
 		{
 			Anum_pg_amproc_amopclaid,
+			Anum_pg_amproc_amprocsubtype,
 			Anum_pg_amproc_amprocnum,
-			0,
 			0
 	}},
 	{AttributeRelationName,		/* ATTNAME */