SelectWithUnionQuery (children 2)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function maxMapState (alias x) (children 1)
     ExpressionList (children 2)
      Literal Array_[UInt64_0]
      Function array (children 1)
       ExpressionList (children 1)
        Function toDateTime64 (children 1)
         ExpressionList (children 2)
          Literal UInt64_0
          Literal UInt64_0
 Identifier JSONEachRow
