SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 1)
    Function CAST (alias x) (children 1)
     ExpressionList (children 2)
      Function modulo (children 1)
       ExpressionList (children 2)
        Function round (children 1)
         ExpressionList (children 1)
          Function sqrt (children 1)
           ExpressionList (children 1)
            Identifier number
        Literal UInt64_4
      Literal \'Enum(\\\'\\\' = 0, \\\'hello\\\' = 1, \\\'world\\\' = 2, \\\'test\\\' = 3)\'
   ExpressionList (children 1)
    Function topK (children 2)
     ExpressionList (children 1)
      Identifier x
     ExpressionList (children 1)
      Literal UInt64_10
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Function numbers (children 1)
       ExpressionList (children 1)
        Literal UInt64_1000