@Override
  void printHeader(Rows.Row header) {}
OutputFormat for hive JSON file format.
Removes "{ "resultset": [...] }" wrapping and prints one object per line.
This output format matches the same format as a Hive table created with JSONFILE file format:
CREATE TABLE ... STORED AS JSONFILE;
e.g.
{"name":"Ritchie Tiger","age":40,"is_employed":true,"college":"RIT"}
{"name":"Bobby Tables","age":8,"is_employed":false,"college":null}
...

Note the lack of "," at the end of lines.
beeline/src/java/org/apache/hive/beeline/JSONFileOutputFormat.java