Issue 599: the condition "in(x, y)" could not be used in the select list when using "group by".

h2/src/main/org/h2/expression/ConditionInConstantSet.java

@@ -116,7 +116,7 @@ public class ConditionInConstantSet extends Condition {
 
     @Override
     public void updateAggregate(Session session) {
-        // nothing to do
+        left.updateAggregate(session);
     }
 
     @Override

h2/src/test/org/h2/test/testScript.sql

@@ -3,6 +3,13 @@
 -- Initial Developer: H2 Group
 --
 --- special grammar and test cases ---------------------------------------------------------------------------------------------
+select x, x in(2, 3) i from system_range(1, 2) group by x;
+> X I
+> - -----
+> 1 FALSE
+> 2 TRUE
+> rows: 2
+
 select * from dual join(select x from dual) on 1=1;
 > X X
 > - -