...

When the shell starts up it takes control of the terminal completely and turns off all output to Java System.out and System.err. To prevent the shell from doing so, set "shell.debug" to true.

Public Interfaces

Samza SQL shell is designed to support other SQLs like Spark SQL. A set of interfaces, located at org.apache.samza.sql.client.interfaces, enable user to implement the SQL executor of their own. 

Implementation and Test Plan

...