Turns out new IN implementation has got some problems in an UPDATE or

DELETE with inherited target table.  Fix it; add a regression test.
Also, correct ancient misspelling of 'inherited'.

src/backend/nodes/copyfuncs.c

@@ -15,7 +15,7 @@
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/nodes/copyfuncs.c,v 1.244 2003/02/16 02:30:37 tgl Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/nodes/copyfuncs.c,v 1.245 2003/03/05 20:01:01 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -1481,12 +1481,16 @@ _copyQuery(Query *from)
 	COPY_NODE_FIELD(limitCount);
 	COPY_NODE_FIELD(setOperations);
 	COPY_INTLIST_FIELD(resultRelations);
+	COPY_NODE_FIELD(in_info_list);
+	COPY_SCALAR_FIELD(hasJoinRTEs);
 
 	/*
-	 * We do not copy the planner internal fields: base_rel_list,
-	 * other_rel_list, join_rel_list, equi_key_list, in_info_list,
-	 * query_pathkeys, hasJoinRTEs.  That would get us into copying
-	 * RelOptInfo/Path trees, which we don't want to do.
+	 * We do not copy the other planner internal fields: base_rel_list,
+	 * other_rel_list, join_rel_list, equi_key_list, query_pathkeys.
+	 * That would get us into copying RelOptInfo/Path trees, which we don't
+	 * want to do.  It is necessary to copy in_info_list and hasJoinRTEs
+	 * for the benefit of inheritance_planner(), which may try to copy a
+	 * Query in which these are already set.
 	 */
 
 	return newnode;

src/backend/nodes/equalfuncs.c

@@ -18,7 +18,7 @@
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/nodes/equalfuncs.c,v 1.187 2003/02/16 02:30:37 tgl Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/nodes/equalfuncs.c,v 1.188 2003/03/05 20:01:02 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -576,12 +576,14 @@ _equalQuery(Query *a, Query *b)
 	COMPARE_NODE_FIELD(limitCount);
 	COMPARE_NODE_FIELD(setOperations);
 	COMPARE_INTLIST_FIELD(resultRelations);
+	COMPARE_NODE_FIELD(in_info_list);
+	COMPARE_SCALAR_FIELD(hasJoinRTEs);
 
 	/*
-	 * We do not check the internal-to-the-planner fields: base_rel_list,
-	 * other_rel_list, join_rel_list, equi_key_list, in_info_list,
-	 * query_pathkeys, hasJoinRTEs.  They might not be set yet, and in any
-	 * case they should be derivable from the other fields.
+	 * We do not check the other planner internal fields: base_rel_list,
+	 * other_rel_list, join_rel_list, equi_key_list, query_pathkeys.
+	 * They might not be set yet, and in any case they should be derivable
+	 * from the other fields.
 	 */
 	return true;
 }

src/backend/optimizer/path/allpaths.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/optimizer/path/allpaths.c,v 1.97 2003/02/15 20:12:40 tgl Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/optimizer/path/allpaths.c,v 1.98 2003/03/05 20:01:03 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -115,7 +115,7 @@ set_base_rel_pathlists(Query *root)
 			/* RangeFunction --- generate a separate plan for it */
 			set_function_pathlist(root, rel, rte);
 		}
-		else if ((inheritlist = expand_inherted_rtentry(root, rti, true))
+		else if ((inheritlist = expand_inherited_rtentry(root, rti, true))
 				 != NIL)
 		{
 			/* Relation is root of an inheritance tree, process specially */

src/backend/optimizer/plan/planner.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/optimizer/plan/planner.c,v 1.149 2003/03/05 18:38:14 tgl Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/optimizer/plan/planner.c,v 1.150 2003/03/05 20:01:03 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -276,8 +276,8 @@ subquery_planner(Query *parse, double tuple_fraction)
 	 * grouping_planner.
 	 */
 	if (parse->resultRelation &&
-	 (lst = expand_inherted_rtentry(parse, parse->resultRelation, false))
-		!= NIL)
+		(lst = expand_inherited_rtentry(parse, parse->resultRelation,
+										false)) != NIL)
 		plan = inheritance_planner(parse, lst);
 	else
 		plan = grouping_planner(parse, tuple_fraction);

src/backend/optimizer/prep/prepunion.c

@@ -14,7 +14,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/optimizer/prep/prepunion.c,v 1.90 2003/02/09 06:56:27 tgl Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/optimizer/prep/prepunion.c,v 1.91 2003/03/05 20:01:03 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -642,7 +642,7 @@ find_all_inheritors(Oid parentrel)
 }
 
 /*
- * expand_inherted_rtentry
+ * expand_inherited_rtentry
  *		Check whether a rangetable entry represents an inheritance set.
  *		If so, add entries for all the child tables to the query's
  *		rangetable, and return an integer list of RT indexes for the
@@ -666,7 +666,7 @@ find_all_inheritors(Oid parentrel)
  * XXX probably should convert the result type to Relids?
  */
 List *
-expand_inherted_rtentry(Query *parse, Index rti, bool dup_parent)
+expand_inherited_rtentry(Query *parse, Index rti, bool dup_parent)
 {
 	RangeTblEntry *rte = rt_fetch(rti, parse->rtable);
 	Oid			parentOID;