Kristian Nielsen wrote:
> Yuan Wang <wangyuanzju@stripped> writes:
>
>> Sorry for one more question. My engine just fill the columns marked in
>> read_set (and primary keys as above) to before_record, and leaves
>> others untouched. I though that these unneeded columns can left as
>> garbage in before_record because MySQL will not use them. Now I know
>> this is not true, they will be written out into the binlog. However I
>> still won't fill these unneeded columns for perfmance reasons. So,
>> should I mark these unfilled columns to be NULL?
>
> I am pretty sure that NDB does not fill in these columns to be NULL. So I
> would think it is not necessary but I do not know the details.
Yes, but NDB is using the injector interface, which allows only some columns to
be replicated.
/Matz
>
> - Kristian.
>
--
Mats Kindahl
Senior Software Engineer
Database Technology Group
Sun Microsystems
