title: Dynamic FROM in U-SQL statement
body: <p>I am trying to generate a dynamic FROM clause in U-SQL so that we can extract data from different files based on a previous query outcome. That's something like this:</p>
  
  <pre><code>@filesToExtract = SELECT whatevergeneratesthepaths from @foo; &lt;-- this query generates a rowset with all the file we want to extract like: [/path/file1.csv, /path/file2.csv]
  SELECT * FROM @filesToExtract; &lt;-- here we want to extract the data from file1 and file2
  </code></pre>
  
  <p>I'm afraid that this kind of dynamics queries are not supported yet, but can someone help pointing me out the way to achieve this? It seems that the only feasible approach is to generate another U-SQL script and execute it afterwards.</p>
  
  <p>Thanks in advance.</p>