Issue 322: Left joins didn't work when used as subquery in the form clause.

h2/src/main/org/h2/command/dml/Select.java

@@ -995,8 +995,11 @@ public class Select extends Query {
             buff.resetCount();
             int i = 0;
             for (TableFilter f : topFilters) {
+                do {
                     buff.appendExceptFirst("\n");
                     buff.append(f.getPlanSQL(i++ > 0));
+                    f = f.getJoin();
+                } while (f != null);
             }
         }
         if (condition != null) {

h2/src/test/org/h2/test/testSimple.in.txt

+create table a(x int);
+create table b(x int);
+select count(*) from (select b.x from a left join b);
+> 0;
+drop table a, b;
 select count(distinct now()) c from system_range(1, 100), system_range(1, 1000);
 > 1;
 select {fn TIMESTAMPADD(SQL_TSI_DAY, 1, {ts '2011-10-20 20:30:40.001'})};