Databricks Connection queries are very expensive?

[schoolsofthough]

Been looking at our AWS and Databricks costs associated with our Looker instance and it looks like the most expensive query is the following:

SELECT '${hiveconf:hive.session.id}' AS connection_id

What is this query for exactly? 

[GavinW · Accepted solution]

This query is used to enable query killing functionality for Looker on Databricks, so it is serving an important purpose.