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Akshay_Kinge
Frequent Visitor

How to fold Query when Column data type is changed in Power Query?

Yes, I am aware that changing data type of a column in power query will prevent query folding as instructed by this doc:
https://docs.microsoft.com/en-us/power-query/power-query-folding

But as an optimizing tactic , it was recommended to use custom columns from power query over calculated columns.
I am also trying to implement incremental refresh which as per document says: https://docs.microsoft.com/en-us/power-query/power-query-folding that query folding is crucial to incremental refresh.

Is there a workaround I can use to keep the col with the changed data type and fold the query ?

1 REPLY 1
selimovd
Community Champion
Community Champion

Hey @Akshay_Kinge ,

 

why don't you put the steps that are braking query folding at the end of the transformation?

Like this Power Query has to send the final query to the SQL Server and then do one or two more steps with in Power Query.

 

Otherwise try to implement these steps in the data source. For example create a view that already transformed the columns to a specific type.

 

If you need any help please let me know.
If I answered your question I would be happy if you could mark my post as a solution ✔️ and give it a thumbs up 👍
 
Best regards
Denis
 

 

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