SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 3)
    Identifier n
    Identifier z
    Identifier changed
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Subquery (children 1)
       SelectWithUnionQuery (children 1)
        ExpressionList (children 1)
         SelectQuery (children 2)
          ExpressionList (children 3)
           Identifier n
           Identifier z
           Function runningDifferenceStartingWithFirstValue (alias changed) (children 1)
            ExpressionList (children 1)
             Identifier n
          TablesInSelectQuery (children 1)
           TablesInSelectQueryElement (children 1)
            TableExpression (children 1)
             Subquery (children 1)
              SelectWithUnionQuery (children 1)
               ExpressionList (children 1)
                SelectQuery (children 3)
                 ExpressionList (children 3)
                  Identifier ts
                  Identifier n
                  Identifier z
                 TablesInSelectQuery (children 2)
                  TablesInSelectQueryElement (children 1)
                   TableExpression (children 1)
                    TableIdentifier system.one
                  TablesInSelectQueryElement (children 1)
                   ArrayJoin (children 1)
                    ExpressionList (children 3)
                     Literal Array_[UInt64_1, UInt64_3, UInt64_4, UInt64_5, UInt64_6] (alias ts)
                     Literal Array_[UInt64_1, UInt64_2, UInt64_2, UInt64_2, UInt64_1] (alias n)
                     Literal Array_[\'a\', \'a\', \'b\', \'a\', \'b\'] (alias z)
                 ExpressionList (children 2)
                  OrderByElement (children 1)
                   Identifier n
                  OrderByElement (children 1)
                   Identifier ts
   Function equals (children 1)
    ExpressionList (children 2)
     Identifier changed
     Literal UInt64_0