CONNECTION

To get current query_id from connection

1. curl -X GET http://fe_host:fe_http_port/api/connection?connection_id=123

If connection_id does not exist, return 404 NOT FOUND ERROR

If connection_id exists, return last query_id belongs to connection_id

1. {
2. "query_id" : 9133b7efa92a44c8-8ed4b44772ec2a0c
3. }