title: SQL like and concat not returning Values
body: <p>The Query below does not return any value except i remove the  "And source like concat('%','','%')" . even if i pass parameters to the like clause, i still do not get any result.</p>
  
  <pre><code>    SELECT 
      *
  FROM
      report r
  WHERE
      DATE(r.txn_date) BETWEEN '2018-01-1' AND '2018-01-17'
          AND r.names LIKE CONCAT('%','','%')
          AND r.comments LIKE CONCAT('%', '','%')
          AND r.tid LIKE CONCAT('%','','%')
          AND r.source like concat('%','','%')
  </code></pre>