[ServiceNow] Delete additional comments or work notes of Incident

First, copy the sys_id of an incident.

Then search the comments in sys_audit and sys_journal_field respectively.

Delete the records carefully.


function confirmDelete(){
   if(confirm('Are you sure you want to permanently delete this history line and all corresponding audit history?\n\nTHIS ACTION CANNOT BE UNDONE!')){
      //Call the UI Action and skip the 'onclick' function
      gsftSubmit(null, g_form.getFormElement(), 'delete_history_line'); //MUST call the 'Action name' set in this UI Action
   }
   else{
      return false;
   }
}

//Code that runs without 'onclick'
//Ensure call to server-side function with no browser errors
if(typeof window == 'undefined')
   deleteHistoryLine();

function deleteHistoryLine(){
   var fieldVal = current["new"];
   var fieldName = current.field;
 
   //Query for and delete the 'sys_audit' record
   var aud = new GlideRecord('sys_audit');
   aud.addQuery('documentkey', current.set.id);
   aud.addQuery('fieldname', fieldName);
   aud.addQuery('newvalue', fieldVal);
   aud.query();
   if(aud.next()){
      aud.deleteRecord();
   }
 
   //Query for and delete the 'sys_journal_field' record (if applicable)
   var je = new GlideRecord('sys_journal_field');
   je.addQuery('element_id', current.set.id);
   je.addQuery('element', fieldName);
   je.addQuery('value', fieldVal);
   je.query();
   if(je.next()){
      je.deleteRecord();
   }
 
   //Set redirect and info message for the parent record
   gs.addInfoMessage(current.label + " entry '" + fieldVal + "' deleted.");
   action.setRedirectURL(current.set.getRefRecord());
 
   //Delete the 'sys_history_line' record
   current.deleteRecord();
}