issue#600

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

@@ -1460,6 +1460,7 @@ public class Select extends Query {
                     }
                     return row;
                 }
+                --rowNumber;
             }
             return null;
         }

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

@@ -10761,3 +10761,16 @@ select * from test where year in (select distinct year from test order by year d
 
 drop table test;
 > ok
+
+----- Issue#493 -----
+create table test as (select char(x) as str from system_range(48,90));
+> ok
+
+select row_number() over () as rnum, str from test where str = 'A';
+> RNUM STR
+> ---- ---
+> 1    A
+
+drop table test;
+> ok
+