Hello,
I just joined a company which uses ODBC to connect to Denodo views. The issue we are having is when Denodo views are named in CamelCase (mix of upper & lower case letters), Alteryx visual query builder does not recognize the columns. Currently, the workaround is to open SQL Editor and place quotes around the view name then follow the input with a select tool to narrow fields. This is a temp solution but still does not address the Empty columns returned issue.