title: How to replace escape character in Netezza column
body: <p>I am trying to replace escape character in Netezza column, but it is not properly replacing. 
  Please help me some one on this. </p>
  
  <pre><code>select replace('replaces\tring','\','\\\\');
  </code></pre>
  
  <p>I need output as <code>replaces\\\\tring</code>. Below is the error message i am getting...</p>
  
  <blockquote>
    <p>ERROR [42S02] ERROR:  Function 'REPLACE(UNKNOWN, UNKNOWN, UNKNOWN)'
    does not exist    Unable to identify a function that satisfies the given
    argument types    You may need to add explicit typecasts</p>
  </blockquote>
  
  <p>Thanks in advance.</p>