Guilhem Bichot пишет:
> Hello Monty,
>
> I have some questions about the specs.
>
>> -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
>> TASK...........: Versioning for delete & update (for transactional
>> tables)
>> DESCRIPTION:
>>
>> Versioning for delete & update (for transactional tables)
>>
>>
>> HIGH-LEVEL SPECIFICATION:
>>
>> For delete, instead of physically deleting rows when maria_delete() is
>> called, we will change the delete internally to an update where the
>> row and it's keys are tagged with the current transaction id as their
>> delete trans id.
>
> Will there be a new type of REDO log record to describe this change done
> to the row or key? Or does some existing REDO log record need to be
> slightly changed?
> If there is a "yes" to one of these questions, we need to update
> recovery's code to add/modify "log record replay" functions.
As I remember our plans now we use the record which purger will use and
for delete will be different record.
[skip]
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/ |/ /_ __/ __/ __ \/ / Mr. Oleksandr Byelkin <sanja@stripped>
/ /|_/ / // /\ \/ /_/ / /__ MySQL AB, Full-Time Developer
/_/ /_/\_, /___/\___\_\___/ Lugansk, Ukraine
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