SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 1)
    Function sumMerge (children 1)
     ExpressionList (children 1)
      Identifier y
   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 CAST (alias y) (children 1)
            ExpressionList (children 2)
             Identifier x
             Literal \'AggregateFunction(sum, Decimal(50, 10))\'
          TablesInSelectQuery (children 1)
           TablesInSelectQueryElement (children 1)
            TableExpression (children 1)
             Subquery (children 1)
              SelectWithUnionQuery (children 1)
               ExpressionList (children 1)
                SelectQuery (children 1)
                 ExpressionList (children 1)
                  Function arrayReduce (alias x) (children 1)
                   ExpressionList (children 2)
                    Literal \'sumState\'
                    Function array (children 1)
                     ExpressionList (children 2)
                      Function toDecimal256 (children 1)
                       ExpressionList (children 2)
                        Literal \'0.000001\'
                        Literal UInt64_10
                      Function toDecimal256 (children 1)
                       ExpressionList (children 2)
                        Literal \'1.1\'
                        Literal UInt64_10