JOIN query doesn't work

[VinodKandula]

SELECT Orders.OrderID, Customers.CustomerName, Orders.OrderDate FROM Orders INNER JOIN Customers ON Orders.CustomerID=Customers.CustomerID

Exception in thread "main" org.es.sql.exception.ElasticSql2DslException: [syntax error] Sql is not select druid
at org.es.sql.parser.ElasticSql2DslParser.check(ElasticSql2DslParser.java:69)
at org.es.sql.parser.ElasticSql2DslParser.parse(ElasticSql2DslParser.java:42)
at org.es.sql.parser.ElasticSql2DslParser.parse(ElasticSql2DslParser.java:26)
at Test.main(Test.java:19)