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Gopal_PV
Helper II
Helper II

Can we use Query Folding in Direct Query mode.

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.

1 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

 

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3 REPLIES 3
Gopal_PV
Helper II
Helper II

@Cookistador  Thank you for reply.

 

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

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
Super User
Super User

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

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