Update cassandra.md

examples/cassandra.md

@@ -26,25 +26,8 @@ Once created, execute queryda with the following commandline using the *cqlexamp
 ```
 bin/queryda --configfile="../jobs/cqlexample.json"
 ```
-### Custom Time-Range Function
-To allow simple time-range queries in Cassandra 3.x, the following custom Function can be used:
-```
-CREATE FUNCTION IF NOT EXISTS toTimestampLast(minutes int) 
-  CALLED ON NULL INPUT 
-  RETURNS timestamp
-  LANGUAGE java AS '
-    long now = System.currentTimeMillis();
-    if (minutes == null)
-      return new Date(now);
-    return new Date(now - (minutes.intValue() * 60 * 1000));
-  ';
-```
-Usage:
-```
-SELECT value FROM test.TEST WHERE LAST_MODIFIED_DATE >= toTimestampLast(60) AND LAST_MODIFIED_DATE <= toTimestamp(now()) LIMIT 100 ALLOW FILTERING;
-```
 
-#### Configuration
+#### Example Configuration
 The following examples illustrates a time-bound
 ```
 {
@@ -66,3 +49,21 @@ The following examples illustrates a time-bound
   }
 }
 ```
+
+### Custom Time-Range Function
+To allow simple time-range queries in Cassandra 3.x, the following custom Function can be used. Note custom functions requires ```enable_user_defined_functions=true``` in cassandra.yaml ahead of usage.
+```
+CREATE FUNCTION IF NOT EXISTS toTimestampLast(minutes int) 
+  CALLED ON NULL INPUT 
+  RETURNS timestamp
+  LANGUAGE java AS '
+    long now = System.currentTimeMillis();
+    if (minutes == null)
+      return new Date(now);
+    return new Date(now - (minutes.intValue() * 60 * 1000));
+  ';
+```
+Usage:
+```
+SELECT value FROM test.TEST WHERE LAST_MODIFIED_DATE >= toTimestampLast(60) AND LAST_MODIFIED_DATE <= toTimestamp(now()) LIMIT 100 ALLOW FILTERING;
+```