SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function CAST (children 1)
     ExpressionList (children 2)
      Function arrayJoin (children 1)
       ExpressionList (children 1)
        Literal Array_[\'42.1\', NULL]
      Literal \'Nullable(Decimal(10, 2))\'
