When dumping CREATE INDEX, must show opclass name if the opclass isn't

in the schema search path.  Otherwise pg_dump doesn't correctly dump
scenarios where a custom opclass is created in 'public' and then used
by indexes in other schemas.

src/backend/utils/adt/ruleutils.c

@@ -3,7 +3,7 @@
  *				back to source text
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/utils/adt/ruleutils.c,v 1.155 2003/09/29 18:55:56 momjian Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/utils/adt/ruleutils.c,v 1.156 2003/10/02 22:24:54 tgl Exp $
  *
  *	  This software is copyrighted by Jan Wieck - Hamburg.
  *
@@ -4030,6 +4030,7 @@ get_opclass_name(Oid opclass, Oid actual_datatype,
 	Form_pg_opclass opcrec;
 	char	   *opcname;
 	char	   *nspname;
+	bool		isvisible;
 
 	/* Domains use their base type's default opclass */
 	if (OidIsValid(actual_datatype))
@@ -4050,11 +4051,15 @@ get_opclass_name(Oid opclass, Oid actual_datatype,
 			actual_datatype = opcrec->opcintype;
 	}
 
-	if (actual_datatype != opcrec->opcintype || !opcrec->opcdefault)
+	/* Must force use of opclass name if not in search path */
+	isvisible = OpclassIsVisible(opclass);
+	
+	if (actual_datatype != opcrec->opcintype || !opcrec->opcdefault ||
+		!isvisible)
 	{
 		/* Okay, we need the opclass name.	Do we need to qualify it? */
 		opcname = NameStr(opcrec->opcname);
-		if (OpclassIsVisible(opclass))
+		if (isvisible)
 			appendStringInfo(buf, " %s", quote_identifier(opcname));
 		else
 		{