在 Power BI 中使用递归 CTE

Question

Power BI has some limitations on Direct queries that has proved a hurdle for me to work around; when using direct Query Power BI takes any query that you input and adds a

Select * From(

statement to the beginning of the code, which prevents the running of any stored procedure, declaring variables, or use CTE Expressions to create temporary/derived tables.

I pulled the Stored Procedure Code out of the procedure, but i cannot figure out how to convert the whole statement from a CTE Expression to a derived expression. Does anyone know how to covert the query? i have only had success with the first select statement, but doing so prevents the Union, the Inner Join, and the relationship given between the two select Statements.

Original Procedure

WITH MaterialsTree(PartNo,SubPartNo,Descrip,Qty,Unit,Purchased,Vendor,TotalQty,UnitCost,UnitPrice,TotalCost,TotalPrice,TotalWt,
      StepNo,PartWt,Materials_ID,ItemNo, ParentID) AS 
(
    SELECT PartNo,SubPartNo,Descrip,Qty,Unit,Purchased,Vendor,TotalQty,UnitCost,UnitPrice,TotalCost,TotalPrice,TotalWt,
      StepNo,PartWt,Materials_ID,ItemNo, CAST(NULL AS INT) AS ParentID
        FROM Materials AS Mat
        WHERE PartNo = @PartNo
    UNION ALL
    SELECT m.PartNo,m.SubPartNo,m.Descrip,m.Qty,m.Unit,m.Purchased,m.Vendor,m.TotalQty,m.UnitCost,m.UnitPrice,m.TotalCost,m.TotalPrice,m.TotalWt,
      m.StepNo,m.PartWt,m.Materials_ID,m.ItemNo, t.Materials_ID AS ParentID
        FROM Materials AS m
        INNER JOIN MaterialsTree AS t 
            ON m.PartNo = t.SubPartNo
)
SELECT PartNo,SubPartNo,Descrip,Qty,Unit,Purchased,Vendor,TotalQty,UnitCost,UnitPrice,TotalCost,TotalPrice,TotalWt,
      StepNo,PartWt,Materials_ID,ItemNo, ParentID 
FROM MaterialsTree

Answer 1

I converted the Stored Procedure over to a Function; this was allowed. thank you for the guidance.