Forum Discussion
Query Folding Icons in Power Query
Unfortuntely, the indicators are only for Power Query Online meaning you won't see it in Power BI Desktop's Power Query Editor.
Hello jakaihammuda ,
it's called Data flows.
check it out here https://learn.microsoft.com/en-us/power-bi/transform-model/dataflows/dataflows-create
For import mode, when the report is refreshed PBI will query the DB with the native query that you see and if the query fold breaks after that, will apply the rest of the steps it needs after it brings the data in.
You can test this yourself, if you check the steps after each transformation.
This step is the navigation to the table.
If I want to take out some columns, the next step will show the query that it will run on refresh. In Power BI its a remove columns step but instead of getting everything and then deleting all the additional columns, it just simplifies the sql query.
Similarly, if I want only 2020 data and filter in Power BI - It folds all those steps into 1 query that will execute when refreshed. Which means less load that Power Query has to do!
Also, does the order of applied steps matter in terms of rolling the native queries into one?
Say if we had the first 5 steps as native queries that are folded
the next 3 are not supported as native query
then we have another 2 queries that are native.
Will PBI send back the 7 native queries rolled into one? Or will it be seperated out as the 5 rolled into one query and sent then the other 2 queries rolled into one and sent back?
I think you've got it!
It wouldn't fold anything after an action that "breaks" it. Because at that point it needs to be processed in Power Query before it goes to the next step.
Hi Syk ,
So essentially, as soon as you hit an applied step that is not supported as Native Query, nothing after that will be identified as a native wuery - even if the step is supported by it such as removing a column?Do you know if the Native queries that are sent back to the source, utilise the DB's index functioning if it has indexing?
I understand, but just it utilise the databases indexing to retrieve the data quicker is my point?