Hive Stored As Option

I am looking for Stored As option to support AVRO format. We are using ER 17.0.2(Build 10207) and do not find AVRO in the options. So is there any way to add AVRO into that drop down list ? Is there a possibility to create a macro to generate DDL and update it ? what options do I have if I want to avoid editing the DDL manually after generating script.