I see some query submitted to Impala with "LIMIT 0' at the end which obviously do not return any rows. It seems like these queries are coming from IBM Datastage. I am from Production support team and I monitor such queries. i know we can use limit 10 or so to limit the number of rows returned but why on the earth someone wants to limit to 0? Is it just to check the syntax of query or connection or something? Before I question the team who submits such query, wanted to double check if there is any reason one would like to say limit 0 at the end.  official documentation at official impala document  does not say any thing about it.  ... View more