Renaming computed columns
Computed columns cannot be renamed with
sp_rename. They must be dropped and then be recreated:
create table some_table (
val_1 decimal(6,2) not null,
val_2 decimal(6,2) not null,
procudt as val_1 * val_2
);
go
insert into some_table values
( 4.56, 6.78),
( 2.05, 11.11),
(-6.23, 9.17);
go
exec sp_rename 'some_table.procudt', 'product'
--
-- Msg 4928, Level 16, State 1, Procedure sp_rename, Line 671 …
-- Cannot alter column 'procudt' because it is 'COMPUTED'.
--
go
alter table some_table drop column procudt;
go
alter table some_table add product as val_1 * val_2
go
select val_1, val_2, product from some_table;
go
Note, the newly created column will be appended as last column, thus possibly altering the order of columns in the table.