fix problems with DELETE USING mentioned in issue #111

Author: funbringer

expected/pathman_basic.out

@@ -1740,6 +1740,20 @@ EXPLAIN (COSTS OFF) DELETE FROM test.range_rel r USING test.tmp t WHERE r.dt = '
 (7 rows)
 
 DELETE FROM test.range_rel r USING test.tmp t WHERE r.dt = '2010-01-02' AND r.id = t.id;
+EXPLAIN (COSTS OFF) DELETE FROM test.tmp t USING test.range_rel r WHERE r.dt = '2010-01-02' AND r.id = t.id;
+                                            QUERY PLAN                                            
+--------------------------------------------------------------------------------------------------
+ Delete on tmp t
+   ->  Hash Join
+         Hash Cond: (t.id = r.id)
+         ->  Seq Scan on tmp t
+         ->  Hash
+               ->  Append
+                     ->  Index Scan using range_rel_1_pkey on range_rel_1 r
+                           Filter: (dt = 'Sat Jan 02 00:00:00 2010'::timestamp without time zone)
+(8 rows)
+
+DELETE FROM test.tmp t USING test.range_rel r WHERE r.dt = '2010-01-02' AND r.id = t.id;
 /* Create range partitions from whole range */
 SELECT drop_partitions('test.range_rel');
 NOTICE:  44 rows copied from test.range_rel_1

sql/pathman_basic.sql

@@ -527,6 +527,9 @@ UPDATE test.range_rel r SET value = t.value FROM test.tmp t WHERE r.dt = '2010-0
 EXPLAIN (COSTS OFF) DELETE FROM test.range_rel r USING test.tmp t WHERE r.dt = '2010-01-02' AND r.id = t.id;
 DELETE FROM test.range_rel r USING test.tmp t WHERE r.dt = '2010-01-02' AND r.id = t.id;
 
+EXPLAIN (COSTS OFF) DELETE FROM test.tmp t USING test.range_rel r WHERE r.dt = '2010-01-02' AND r.id = t.id;
+DELETE FROM test.tmp t USING test.range_rel r WHERE r.dt = '2010-01-02' AND r.id = t.id;
+
 
 /* Create range partitions from whole range */
 SELECT drop_partitions('test.range_rel');

src/planner_tree_modification.c

@@ -188,15 +188,6 @@ disable_standard_inheritance(Query *parse)
 	ListCell   *lc;
 	Index		current_rti; /* current range table entry index */
 
-/*
- * We can't handle non-SELECT queries unless
- * there's a pathman_expand_inherited_rtentry_hook()
- */
-#ifndef NATIVE_EXPAND_RTE_HOOK
-	if (parse->commandType != CMD_SELECT)
-		return;
-#endif
-
 	/* Walk through RangeTblEntries list */
 	current_rti = 0;
 	foreach (lc, parse->rtable)