title: logstash filters to parse comma separated log file
body: <p>I have a log file which looks like this:</p>
  
  <pre><code>2019-04-19 08:30:06,477 DEBUG [org.mobicents.smsc.library.CdrGenerator] 2019-04-19 08:30:01.960,466,2,1,01706488575,1,1,success,SMPP,message,3rdPartyName,10614279,null,null,01702993001,412012102179043,null,null,0170260020,0,0,null,0,0,,,,2393,"*466#
  nxxxxxxxxxxxxxxx","",,,
  </code></pre>
  
  <p>I want to filter this logs on logstash and only get and store few columns. 
  as you see the logs column are comma separated, I want to ignore all columns except: </p>
  
  <ul>
  <li>the date and time part from column 2 ( i want to get date and time as 2 different columns) </li>
  <li>column 9 and column 12</li>
  </ul>