Balázs Kossovics

Namespace mapping causes ClassCastException upon deserialization

1

When I try to serialize/deserialize an Avro structure using the SpecificDatumWriter/SpecificDatumReader classes, the deserialization throws a `ClassCastException`: ``` Exception in thread "main" java.lang.ClassCastException: org.apache.avro.generic.GenericData$Record cannot be cast to foo.scala.Status ```...

Support "union" and "groupBy" datasource type

3

The only currently supported datasource type is "table", but it would be nice to eventually support the [two other](http://druid.io/docs/latest/querying/datasource.html) too.