It seems if you just do a dbxquery it presents same behavior as the SQL Explorer.
I can confirm however that defining the inputs with the query does bring in the data properly. I did not make modifications to the tables or db itself.
Hope it helps.
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Worked with support on this earlier today and this seems to be a UI issue. I went ahead and created the inputs and the data comes in fine for the columns that show Non-Displayable Column Type
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