AlterQuery  ttl_old_syntax (children 2)
 ExpressionList (children 1)
  AlterCommand MODIFY_TTL (children 1)
   ExpressionList (children 1)
    TTLElement (children 1)
     Function toDate (children 1)
      ExpressionList (children 1)
       Literal \'2020-01-01\'
 Identifier ttl_old_syntax
