SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 2)
    Literal Float64_0.1 (alias level)
    Literal UInt64_1 (alias max_size)
   ExpressionList (children 1)
    Function groupArray (children 2)
     ExpressionList (children 1)
      Identifier col
     ExpressionList (children 1)
      Identifier max_size
   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 quantile (alias col) (children 2)
            ExpressionList (children 1)
             Identifier number
            ExpressionList (children 1)
             Identifier level
          TablesInSelectQuery (children 1)
           TablesInSelectQueryElement (children 1)
            TableExpression (children 1)
             Function numbers (children 1)
              ExpressionList (children 1)
               Literal UInt64_1000
