SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 3)
    Identifier engine_full
    Identifier total_rows
    Function less (children 1)
     ExpressionList (children 2)
      Identifier total_bytes
      Function multiply (children 1)
       ExpressionList (children 2)
        Literal UInt64_2
        Subquery (children 1)
         SelectWithUnionQuery (children 1)
          ExpressionList (children 1)
           SelectQuery (children 2)
            ExpressionList (children 1)
             Identifier total_bytes
            TablesInSelectQuery (children 1)
             TablesInSelectQueryElement (children 1)
              TableExpression (children 1)
               TableIdentifier initial_table_size
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier one_row_table_size
