MinList function is not working in Date or datetime values in DRM

Question

Hi,
We have a custom property End Date with data type as Date. We want to calculate the minimum end date across all the children of a particular node.
While using the below function it is giving blank value as output.
MinList(ReplaceStr(ListNodePropValues(ListChildren(SortOrder),[comma],Custom.NO_ALL_ALL_ENDDATE),[comma],#,true),#,date)
If we remove the MinList part and only evaluate ReplaceStr(ListNodePropValues(ListChildren(SortOrder),[comma],Custom.NO_ALL_ALL_ENDDATE),[comma],#,true), we are getting an output like 12/31/2019#12/31/2018.
Why DRM is not able to extract the min value? Does DRM not support this kind of use of this function?
We have even tried with a date time property, but the result is same.
If by using the above mentioned method it is not possible to get the min date value, what alternative approach can be taken for achieving this?
Any help on this is much appreciated.
Thanks
Sudipta

Answer 1

I found this useful, check if it helps,
Using MinList and MaxList with Date Or DateTime Values In DRM (Doc ID 1967005.1)
Hyperion Data Relationship Management - Version 11.1.2.3.000 and later
Information in this document applies to any platform.
GOAL
Example: How can we calculate the minimum end date across all the children of a particular node?
You have a custom property End Date with data type as Date. You have tried using MinList in conjunction with ListNodePropValues thus:
MinList(ReplaceStr(ListNodePropValues(ListChildren(SortOrder),[comma],Custom.EndDate),[comma],#,true),#,date)
This gives a blank value as output.
SOLUTION
The most robust way of doing this using formulas is to format the date property as a string in ISO 8601 format. In yyyy-mm-dd format, alphabetic order is also date order. Add a helper String property like this:
FormattedDate(Custom.EndDate),yyyy-mm-ddThh:mm:ss) -- omit the time from the 'T' on if desired. Note that the format string is case sensitive.
Then the MinList function
  MinList(ReplaceStr(ListNodePropValues(ListChildren(SortOrder),[comma],Custom.Helper),[comma],#,true),#,string)
will work.
Note that the functions MinList and MaxList return a blank value if the list contains any members that are not of the specified data type. Using ReplaceStr will implicitly convert the dates into strings, causing MinList and MaxList to fail if you specify DateTime.