Re: [Firebird-devel] HEAD branch and ODS changes

[Ann H. <aha...@ib...>]

Nickolay Samofatov wrote:

>To make new backup technology work I need to introduce a slight ODS
>change, add explicit field to store difference file name in database
>header page. Using clumplets mechanizm doesn't seem feasible because I
>cannot use normal page locking while reading header page (because I
>may need to read this page from CCH_fetch_page).
>
That seems unlikely.  Read the clumplet during startup, as one normally 
does with everything on the header page.  There's nothing magic about 
clumplets.

>While it is possible to refactor this change to minor ODS change
>at the cost of algorithm clarity and performance.
>(use header to store pointer to special page holding difference file name)
>
that doesn't seem up to your usual standards.

>
>What is our policy regarding this subject ? Are major ODS changes
>allowed on HEAD branch ?
>
My view?  No.

Ann