Hi!
On Nov 21, Marko M?kel? wrote:
> I have been informed that in MySQL 5.1, pluggable storage engines will be
> able to declare their own configuration parameters and settable variables.
> In struct st_mysql_plugin (include/mysql/plugin.h), there are three
> fields for this:
>
> struct st_mysql_show_var *status_vars;
> void * __reserved1; /* placeholder for system variables */
> void * __reserved2; /* placeholder for config options */
>
> I would have expected to find an example of the usage in
> storage/example/ha_example.cc. Alas, all three fields are initialized
> to NULL there, just like in every other storage engine that is currently
> available at bk://mysql.bkbits.net/mysql-5.1.
This is not implemented yet :(
> When will this be implemented?
This is work in progress, Antony is working on it at the very moment.
> I hope that the __reserved1 and __reserved2 will be function pointers,
> because that would allow the storage engine to be notified when a
> change is requested. That kind of functionality would be desired for
> resizing the InnoDB buffer pool at runtime.
Sure, it will be possible.
Regards,
Sergei
--
__ ___ ___ ____ __
/ |/ /_ __/ __/ __ \/ / Sergei Golubchik <serg@stripped>
/ /|_/ / // /\ \/ /_/ / /__ MySQL AB, Senior Software Developer
/_/ /_/\_, /___/\___\_\___/ Kerpen, Germany
<___/ www.mysql.com
