title: Sqoop fails to import any rows
body: <p>I'm trying to import a dummy table (cities) into HDFS with the following command:</p>
  
  <pre><code>$ sqoop import --connect jdbc:oracle:thin:@10.0.2.15:1521/XE --username system --password root --table cities --columns country,city --split-by id --target-dir /sqoop/output1
  </code></pre>
  
  <p>but no rows get imported.</p>
  
  <p>The SQL statement that gets generated by Sqoop is</p>
  
  <pre><code>SELECT t.* FROM cities t WHERE 1=0
  </code></pre>
  
  <p>which is odd because 1 will never be equal to zero.</p>
  
  <p>I'm running:</p>
  
  <pre><code>Hadoop 2.4.1
  Sqoop 1.4.5
  </code></pre>