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Re: updating a string session variable from a storage engine
On Sep 12, Rich Prohaska wrote:
> i have a MYSQL_THDVAR_STR session variable in my storage engine. i
> want to update its value from the storage engine. it was suggested
> that i use "THDVAR(x)=new_value" to do it. i noticed that
> update_func_str is NOT called, so i wonder about the contract. is the
> caller responsible for memory management? i used PLUGIN_VAR_MEMALLOC
> for the var def.
Yes. When you assign from your code, it's just a normal assignment.
You can assign anything you want.
The update function is called when a value is assigned from SQL, like
SET @@session.engine_x = new_value