SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function timestamp (children 1)
     ExpressionList (children 3)
      Literal \'2013-12-31 12:00:00\'
      Literal \'12:00:00\'
      Literal \'\'
