I have a Power BI report that connects to a cloud source via an ODBC driver. The cloud source's DB is MySQL. I have a fairly long and complicated list of steps that are applied in my query (e.g., query 2+ tables, merge, etc). Is there a way to expose the equivalent MySQL query that M generates?
I just discovered that there is a View Native Query feature when you right-click on certain steps in the query. In particular, so far, I see that there are are queries for Navigation and Removed Other Columns steps. I was expecting to see a query only for the Navigation step. Does this imply that Power BI reads the data multiple times?
You can find the M code in the power query, please refer to the picture as below.
I know I can expose the M query. My problem is that I need the M query converted to the query language of the source (in this case, MySQL). I now know that I can view the source query with the 'View Native Query' feature (right-click on a step in the query editor). However, I don't understand why I can see 'View Native Query' for 2+ steps. I was expecting to see only 1 native query. For example, I expect to see a native query for the default Navigation step, but I wasn't expecting to see a native query for a 'Removed Other Columns' step. Does this imply that 2+ queries are issued to the source? Or, does Power BI convert the 2+ queries into 1 query and issue that 1 query to the source?