title: Sort rows taking too long
body: <p>I'm new to Pentaho.</p>
  
  <p>The following transformation seems to be correct.</p>
  
  <p>However, it is taking eternities to sort the rows:</p>
  
  <p><a href="https://i.stack.imgur.com/K29pY.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/K29pY.png" alt="enter image description here"></a></p>
  
  <p>This is the step:</p>
  
  <p><a href="https://i.stack.imgur.com/NH3VI.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/NH3VI.png" alt="enter image description here"></a></p>
  
  <p>Why is this taking so long and how can I improve this?</p>
  
  <p>This is Merge join 2:
  <a href="https://i.stack.imgur.com/eE225.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/eE225.png" alt="e"></a></p>