SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 1)
    Function maxOrDefaultIfMerge (children 1)
     ExpressionList (children 1)
      Identifier state
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Subquery (children 1)
       SelectWithUnionQuery (children 1)
        ExpressionList (children 1)
         SelectQuery (children 2)
          ExpressionList (children 1)
           Function maxOrDefaultIfState (alias state) (children 1)
            ExpressionList (children 2)
             Identifier x
             Function greater (children 1)
              ExpressionList (children 2)
               Identifier x
               Literal UInt64_0
          TablesInSelectQuery (children 1)
           TablesInSelectQueryElement (children 1)
            TableExpression (children 1)
             Subquery (children 1)
              SelectWithUnionQuery (children 1)
               ExpressionList (children 1)
                SelectQuery (children 1)
                 ExpressionList (children 1)
                  Literal UInt64_1 (alias x)