Update TODO list.

doc/TODO

 TODO list for PostgreSQL
 ========================
-Last updated:		Tue Jul 20 13:15:50 EDT 1999
+Last updated:		Tue Jul 20 13:24:02 EDT 1999
 
 Current maintainer:	Bruce Momjian (maillist@candle.pha.pa.us)
 
@@ -38,6 +38,10 @@ PARSER
   INSERT INTO inherit_table (unique_index_col) VALUES (dup) should fail
 * CREATE TABLE x AS SELECT 1 UNION SELECT 2 fails
 * CREATE TABLE test(col char(2) DEFAULT user) fails in length restriction
+* SELECT ... UNION ... ORDER BY fails when sort expr not in result list
+* INSERT ... SELECT ... UNION is not reliable
+* Be smarter about promoting types when UNION merges different data types
+* SELECT ... UNION ... GROUP BY fails if column types disagree
 
 VIEWS