SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 5)
   ExpressionList (children 2)
    Identifier k
    Function finalizeAggregation (children 1)
     ExpressionList (children 1)
      Function quantilesTimingState (children 2)
       ExpressionList (children 1)
        Identifier x
       ExpressionList (children 1)
        Literal Float64_0.5
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Subquery (children 1)
       SelectWithUnionQuery (children 1)
        ExpressionList (children 1)
         SelectQuery (children 4)
          ExpressionList (children 1)
           Function toNullable (alias d) (children 1)
            ExpressionList (children 1)
             Function if (children 1)
              ExpressionList (children 3)
               Function equals (children 1)
                ExpressionList (children 2)
                 Identifier number
                 Literal UInt64_3
               Literal UInt64_3
               Literal UInt64_1
          ExpressionList (children 2)
           Function intDiv (alias k) (children 1)
            ExpressionList (children 2)
             Identifier number
             Literal UInt64_3
           Function modulo (alias x) (children 1)
            ExpressionList (children 2)
             Identifier number
             Identifier d
          TablesInSelectQuery (children 1)
           TablesInSelectQueryElement (children 1)
            TableExpression (children 1)
             TableIdentifier system.numbers
          Literal UInt64_100000
   ExpressionList (children 1)
    Identifier k
   ExpressionList (children 1)
    OrderByElement (children 1)
     Identifier k
   Literal UInt64_5