I have custom DataEntity (Let’s say STATUS). One of not root DataSource is StateDateTable Table, which contains two fields (InventSerialId and StateDate)

For StateDateTable.StateDate field I use an EDT StateDate (Date type), which is array and which contains 29 elements.

So If we look into SQL, we will see something like this

At the same time,
In my DataEntity STATUS, I need to create several Unmapped fields, and in order to calculate values for these Unmapped fields I need to take values of array elements from StateDateTable.StateDate field, something like

But as you can see from screenshot, the reference to STAEDATE2_ field is not correct, so the question is:
How can I referee to the element of array of the field of DataSource in DataEntity?
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