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tmendoza's avatar
tmendoza
Resolver I
9 months ago
Solved

Dynamic M Query Parameters not working when I make slicer selection

You folks have always been a great help to me.  What am I doing wrong with my Dynamic M Query Parameter set up? I'm trying to speed up my Direct Query by utilizing Dynamic M Query Parameters. I fo...
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  • parry2k's avatar
    parry2k
    9 months ago

    tmendoza For everyone, it is fixed, and the solution was to remove "&" from the table name "P&L_GLDQ" 🤷

tmendoza's avatar
tmendoza
Resolver I
9 months ago

Prior to the Dynamic M query parameter set up, I built the 'Periods' table to have a '1 to many' relationship with the Direct Query table via 'Period'. It's essentialy a dimention table. Due to this, the Period slicer, which used 'Period' from the 'Periods' table, could filter the direct query via 'Period'.

 

It was a good thought, but removing the relationship does not seem to solve the issue. The below error message still pops up when I make a slicer selection. When I remove the slicer, the error disapears. It seems to be very sensitive to me using the 'Period' column which is bound to the parameter.

 

 

  • tmendoza's avatar
    tmendoza
    Resolver I
    9 months ago

    Thanks for the links. They gave me more insight on the limitations of what parameters can be bound. According to the links, I should be fine. There are no data transformations in my power query.

    I created another query source and set it up the same way. But no luck. I'm getting the same behavior. The Direct Query works and expresses only the period that is in the parameter. However, when I make a slicer selection with the data field (Period) that's bound to the parameter the direct query breaks.

    • v-prasare's avatar
      v-prasare
      Community Support
      9 months ago

      Hi tmendoza,

      Thanks for confirming that your Period column is a Whole Number. The issue might occurring because the current M query wraps the numeric parameter in single quotes. When Power BI applies the slicer selection, those quotes cause the value to be treated as text, which breaks query folding and triggers the error:
      “Conversion of an M query in table 'P&L_GLDQ' into a native source query aborted due to too many failures.”

       

      To resolve this, remove the quotes and ensure the parameter type is correctly set up.

       

      Try this below M query:

       

      let
          source = Sql.Database(
              "MCMC.MadeUpServer.com",
              "DIY_MadeUpDataBase",
              [
                  Query = "
                      SELECT * 
                      FROM dbo.vPLGL_ISDashboard
                      WHERE Period = " & Number.ToText(fiscal_period)
              ]
          )
      in
          source

       

       

      Set the parameter fiscal_period as Whole Number (or Decimal Number) in Manage Parameters. Bind it to the Period[Period] field from your imported Period table.

       

      Use only the single query step shown above. Do not include any transformations (renamed columns, type changes, filters, etc.).
      If “View Native Query” is greyed out in Power Query, folding is already broken and the parameter will not work.

       

      Relationships between the imported Period table and the DirectQuery table are not required for the dynamic parameter to work.
      You can disable them temporarily if needed for troubleshooting.

       

      Removing the quotes ensures the numeric parameter folds correctly into the SQL query.
      With the parameter bound properly and no transformations applied, the slicer will dynamically filter the DirectQuery data without breaking native query folding.

       

       

       

      Thanks,

      Prashanth

      • tmendoza's avatar
        tmendoza
        Resolver I
        9 months ago

        Prashanth,

         

        Thanks for your input. Your feedback makes a lot of sense to me. The "View Native Query" advice was a helpful hint.

        Unfortunately my dashboard is still disagreable.

         

        I copied and pasted your M query into the Advanced Editor and the query did run successfully. 

        However, I do see that the "View Native Query" option is greyed out.

        Due to this, the parameter is still not working. I get the same error: “Conversion of an M query in table 'P&L_GLDQ' into a native source query aborted due to too many failures.”

        From what I've read, this should be working at this point. I really don't understand what else we're missing.

        I will continue to troubleshoot with this new information and let you know if I have any success.

        Thanks again!

        Below are the the latest screen captures of my query and parameter.

         

        let

    source = Sql.Database
            (
                "MCMC.MadeUpServer.com",
                "DIY_MadeUpDataBase",
        [
            Query = "
                SELECT * 
                FROM dbo.vPLGL_ISDashboard
                WHERE Period = " & Number.ToText(fiscal_period)
        ]
    )
in
    source