SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 1)
    Function topKMerge (children 2)
     ExpressionList (children 1)
      Identifier state
     ExpressionList (children 2)
      Literal UInt64_4
      Literal UInt64_2
   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 topKState (alias state) (children 2)
            ExpressionList (children 1)
             Function countDigits (children 1)
              ExpressionList (children 1)
               Function multiply (children 1)
                ExpressionList (children 2)
                 Identifier number
                 Identifier number
            ExpressionList (children 3)
             Literal UInt64_4
             Literal UInt64_2
             Literal \'counts\'
          TablesInSelectQuery (children 1)
           TablesInSelectQueryElement (children 1)
            TableExpression (children 1)
             Function numbers (children 1)
              ExpressionList (children 1)
               Literal UInt64_1000
