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Evaluation of DBRW Formula in VBA

Posted: Tue Feb 13, 2018 3:10 pm
by Amorau
Dear Experts,
I’m currently working on some automation functions for TM1 in Excel/VBA.
For some purpose I would like to pass on the result of a DBRW Formula to a VBA variable.

I cannot simply us the cell value, as the DBRW Formula could be part of another calculation within that cell.
Example:
=DBRW($B$1;$B$2;$B$3;$B$4;$B$5;$B$6;$B$7;$B$8;B$11;$A12) * 2

Would anyone be able to tell me how to evaluate the DBRW?

Any help is highly appreciated!

Re: Evaluation of DBRW Formula in VBA

Posted: Tue Feb 13, 2018 3:38 pm
by Steve Rowe
Like most of the TM1 functions you can use Application.Run("DBRW" , Arg1 , Arg2, etc)

Re: Evaluation of DBRW Formula in VBA

Posted: Tue Feb 13, 2018 9:49 pm
by jrizk
For simple formulas you can strip out the dbrw based on *, / , +, - after the closing bracket using Instr.

More complex formulas will require a some code or function to work out the positions of the opening and closing brackets of the the DBRW so it can be stripped out using those positions.

x = InStr(1, Range("A10").Formula, "*")

If x > 0 Then
y = Mid(Range("A10").Formula, 1, x - 1)
result= Application.Evaluate(y)
End If

Re: Evaluation of DBRW Formula in VBA

Posted: Wed Feb 14, 2018 8:02 am
by Amorau
Steve Rowe wrote:
Tue Feb 13, 2018 3:38 pm
Like most of the TM1 functions you can use Application.Run("DBRW" , Arg1 , Arg2, etc)

Steve, thanks for your help with this. That was exactly what I had tried unsuccessfully.
However your post helped me understanding that my mistake was somewhere else:

I had tried:
TM1Result = Application.Run(FType, TM1Parameters)

with "FType" containing the type of formula (e.g. DBRW or DBRA) and
with "TM1Parameters" containing the parameters as string (e.g. "SERVER:CUBE,EUR,Turnover,ACT,Worldwide,....")


I now moved all parameters to an array and it works:
TM1Result = Application.Run(FType, aParameters(0), aParameters(1),....,aParameters(10) )


QUESTION: The number of parameters can change, depending on the number of dimensions of the cube.
Is there a way to evalute the DBRW with a dynamic range of parameters?

Re: Evaluation of DBRW Formula in VBA

Posted: Wed Feb 14, 2018 3:16 pm
by Wim Gielis
You have to do the hard work of splitting up the formula in pieces, one argument is 1 piece, and work from there.
Watch out for arguments that are text but contain the separator for arguments, like a comma in the name of an element.
The TM1 Tools addin has code for this, have a look at it, here on the forum.

Re: Evaluation of DBRW Formula in VBA

Posted: Wed Feb 14, 2018 3:47 pm
by Amorau
Hi Wim,
I already split the formula into pieces (with the help of code from the addin) and now I have an array (see below) with all arguments.
However the array lengh can be varying, depending on the number of dimension in the queried cube.

I found a solution for my problem today:
With a "select case" I can evaluate the DBRW Formula while considering the needed amount of arguments.

(in "numArgs" I have the length of the array)

Select Case numArgs
Case 2
TM1Result = Application.Run(FType, argsArrayValue(0), argsArrayValue(1), argsArrayValue(2))
Case 3
TM1Result = Application.Run(FType, argsArrayValue(0), argsArrayValue(1), argsArrayValue(2), argsArrayValue(3))
Case 4
TM1Result = Application.Run(FType, argsArrayValue(0), argsArrayValue(1), argsArrayValue(2), argsArrayValue(3), argsArrayValue(4))
Case 5
TM1Result = Application.Run(FType, argsArrayValue(0), argsArrayValue(1), argsArrayValue(2), argsArrayValue(3), argsArrayValue(4), argsArrayValue(5))
etc...

But this is no elegant solution.
I thought that there probably would be a better solution for calling a function with variable amount of arguments....
Is is not??

Many Thanks for your comments!

Re: Evaluation of DBRW Formula in VBA

Posted: Thu Feb 15, 2018 2:21 am
by jrizk
Try:

sDBFormula = "DBRW("
For i = 0 To numArgs
sDBFormula = sDBFormula & """" & Application.Evaluate(argsArrayValue(i)) & ""","
Next i
sDBFormula = Mid(sDBFormula, 1, Len(sDBFormula) - 1) & ")"

myValue = Application.Evaluate(sDBFormula)

You may have to include/exclude the quotes for each of the arguments in the above depending in how you split the arguments.

Re: Evaluation of DBRW Formula in VBA

Posted: Thu Feb 15, 2018 9:16 am
by Amorau
Thank you, jrizk,
That was helpful!

Using the Evaluate Method helped:

TM1VBAString = FType & "(" & Chr(34) & Join(argsArrayValue, Chr(34) & "," & Chr(34)) & Chr(34) & ")"
TM1Result = Application.Evaluate(TM1VBAString)

Just using the JOIN instead of For...next.