Can we use Query Folding in Direct Query mode.

[Gopal_PV]

Hi Folks,

I have Direct query mode for my SQL Server. In Direct Query Table view is Disable then How can i use Query Folding in DQ Mode.

Can you please help me in this.

[Gopal_PV]

@Cookistador  Thank you for reply.

Power Query also use some transformations for Query Folding right then how it differ 

[Cookistador · Accepted solution]

Some of the most common transformation that support query folding are:

• Removing or renaming columns
• Merging foldable queries that are based on the same source.
• Appending foldable queries based on the same source.
• Numeric calculations
• Joins
• Pivot and unpivot

The transformations that do not support query folding include:

• Merging or appending queries that are based on different sources.
  • Using some functions while adding custom columns that do not have a counterpart in SQL.
  • Adding columns with complex logic. These refer to functions that do not have equivalent functions in the data source.

The rule of thumb that I use : is or possible to do this opération in SQL ? If yes then low chance to break m'y query folding

[Cookistador]

For a DirectQuery or Dual storage mode table, the Power Query query must achieve query folding, this is why some transformations are not supported by DQ

So by default, it is used 🙂

You can find more details under the following url:

https://learn.microsoft.com/en-us/power-bi/guidance/power-query-folding