title: mySql function return nothing
body: <p>I'm creating this function that supposed to return a random string:</p>
  
  <pre><code>create function createRandomString() returns Text
          return concat( 
          char(round(rand()*25)),
          char(round(rand()*25)),
          char(round(rand()*25)),
          char(round(rand()*25)),
          char(round(rand()*25)),
          char(round(rand()*25)),
          char(round(rand()*25)),
          char(round(rand()*25))
      );    
  </code></pre>
  
  <p>For some reason this function return nothing... i don't know why..</p>
  
  <p>When i'm using the exact same <code>concat()</code> inside a select - it works.</p>