SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 2)
    Literal \'1960-01-01\' (alias input)
    Function toDateOrNull (alias result) (children 1)
     ExpressionList (children 1)
      Literal \'1960-01-01\'
