In my last post I had an example for a function to return a single value from an MDX query which has certain performance drawbacks when being used in many Excel fields.

Since Excel supports matrix formulas to do a computation on multiple values, this can also be used for MDX query results. Another benefit for this approach is, that dimension members that are added later on, are also displayed in the query result.

Before I post the function code, here's the result. For my test, I used this MDX query on the Adventure Works cube:

SELECT

{

[Measures].[Internet Sales Amount],

[Measures].[Internet Order Quantity],

[Measures].[Internet Gross Profit]

} ON 0,

[Product].[Category].[Category] ON 1

FROM [Adventure Works]

The result, when being called from SQL Server Management Studio, looks like this:

The following screenshot shows how this result looks like in Excel using the matrix MDX formula:

Now, what are the #N/A entries about? The matrix formula measures the size of the resulting cell area and returns a two dimensional array of exactly that size. When entering the formula I chose a larger area on the worksheet in order to be prepared for additional entries on both axes. Of course you could think of returning a larger matrix from the function in order to properly fill out the unused cell. The best approach would be to supply width and height as parameters.

So, this is how the formula is to be entered:

Be sure to press CTRL+ALT+ENTER when entering the formula in order to turn it into a matrix formula.

The MDXGetMDX function takes five parameters:

Parameter | Description | Example |

Server | Hostname of the SSAS server | localhost |

InitalCatalog | Name of the SSAS database | Adventure Works DW |

Cube | Name of the SSAS cube | Adventure Works |

mdx | MDX code of the query | select ... on 0, ... on 1 from cubename |

WithCaption | When true, captions are printed | true |

Finally, here's the code I used for the MDGetMDX(...) function:

Function MDGetMDX(Server As String, InitialCatalog As String, Cube As String, mdx As String, WithCaption As Boolean) As Variant

On Error GoTo errorhandler:

Dim cset As New ADOMD.Cellset

Dim conn As New ADODB.connection

Dim x As Variant

Dim i As Integer, j As Integer

Dim i0 As Integer, j0 As Integer ' begin of the data area

Dim i1 As Integer, j1 As Integer ' size of the data area

conn.Open "Data Source=" & Server & ";Provider=MSOLAP;Initial Catalog=" & CatalogName & "" & InitialCatalog & ""

cset.Open mdx, conn

If cset.Axes.Count > 2 Then

MDGetMDX = "More than 2 axes are not allowed!"

Exit Function

End If

If cset.Axes.Count > 0 Then i1 = cset.Axes(0).Positions.Count Else j1 = 0

If cset.Axes.Count > 1 Then j1 = cset.Axes(1).Positions.Count Else j1 = 0

If WithCaption Then

' column headings are displayed as rows

If cset.Axes.Count > 1 Then i0 = cset.Axes(1).DimensionCount Else i0 = 0

' row headings are displayed as columns

If cset.Axes.Count > 0 Then j0 = cset.Axes(0).DimensionCount Else j0 = 0

Else

i0 = 0

j0 = 0

End If

If cset.Axes.Count = 2 Then

ReDim x(j0 + j1 - 1, i0 + i1 - 1)

ElseIf cset.Axes.Count = 1 Then

ReDim x(j0, i0 + i1 - 1)

Else

ReDim x(1, 1)

End If

For i = 0 To UBound(x, 2)

For j = 0 To UBound(x, 1)

x(j, i) = ""

Next

Next

' Show caption:

If WithCaption Then

For i = 0 To i1 - 1

For j = 0 To cset.Axes(0).Positions(i).Members.Count - 1

x(j, i + i0) = cset.Axes(0).Positions(i).Members(j).Caption

Next

Next

For j = 0 To j1 - 1

For i = 0 To cset.Axes(1).Positions(j).Members.Count - 1

x(j + j0, i) = cset.Axes(1).Positions(j).Members(i).Caption

Next

Next

End If

If cset.Axes.Count = 2 Then

For i = 0 To i1 - 1

For j = 0 To j1 - 1

x(j + j0, i + i0) = nz(cset(i, j).Value, 0)

Next

Next

ElseIf cset.Axes.Count = 1 Then

For i = 0 To i1 - 1

x(j0, i + i0) = nz(cset(i).Value, "")

Next

Else

x(0, 0) = cset(0).Value

End If

MDGetMDX = x

cset.Close

conn.Close

Exit Function

errorhandler:

MDGetMDX = Err.Description

End Function

Function nz(x As Variant, other As Variant) As Variant

If Not IsNull(x) Then

nz = x

Else

nz = other

End If

End Function

This looks excellent, friend. However, I tried your code but nothing appears as a result in the worksheet.

ReplyDeleteHow can I get the MDX query result in Excel worksheet using this function?

Are you sure you entered the formula as a matrix formula? You have to hold CTRL+SHIFT and then press ENTER while the cursor is in the input box for the formula. The formula then appears in curly brackets

ReplyDeleteThank you for the response. I am able to see the curly brackets.

ReplyDeleteWhen the WithCaption is True, I get blank report. When the WithCaption is set to False, I get only first cell value(which is 700760) in the cell where formula is.

I'm using SQL Server 2008 SP1 and Excel 2007.

Sounds like you didn't mark enough cells. Before entering the matrix formula in the described way you have to mark the full area of cells. Try with 10 by 10 cells to see the effect. Everything outside of your selection will be cropped.

ReplyDeleteMany Thanks! Correct that was the mistake. Happy that I learned something new in Excel with your help. Much appreciated!

ReplyDeleteBah! thanks a ton, but I was going batty, you state "CTRL+ALT+ENTER" but it's ctrl+SHIFT+enter!

ReplyDeleteIt’s actually a great and helpful piece of information. I am glad that you shared this helpful information with us. Please keep us up to date like this. Thanks for sharing

ReplyDeleteCBEST, CBEST test preparation