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As you already know, DIRECT DISCOVERY allows to aggregate data at runtime using SQL-function in expressions. You can, for example, use following expression to find out maximux value for appropriate dimensions: SQL('MAX(some_column)'). But how about stored procedures execution? Something like this: SQL('EXEC MyStoredProcedure'). But such syntax is not allowed, i've go a message "Direct query failed" in my chart. After a while i've found solution and i would like to share idea here. Need to say, i've used MS SQL and following solution could be used with Microsoft SQL.
Here you are:
SQL('1 as Dummy; EXEC MyStoredProcedure; --')