Dany Hoter looks at some KQL query plans:
Each visual on the page is going to summarize data from one or more queries and add the summarize part of the query.
If your model contains multiple tables in direct query with relations between them, the connector will generate joins between the tables.
Selecting values in filters will create multiple where conditions.
In order to see the final query and understand the performance implications of each query and the total query load created by a report, you need to use the command “.show queries” in the context of the database.
Click through for Dany’s notes on the topic, including a few tips on what to look for.