Re: Extensible Rmgr for Table AMs

On Mon, 2021-11-08 at 15:36 -0800, Jeff Davis wrote:
> The attached patch (against v14, so it's easier to test columnar) is
> somewhat like a simplified version of [3] combined with refactoring
> to
> make decoding a part of the rmgr.

I created a wiki page here: 
https://wiki.postgresql.org/wiki/ExtensibleRmgr

To coordinate reservation of RmgrIds, to avoid conflicts. I don't
expect it to be a practical problem given how much work it takes to
create a new table AM that needs full WAL support, but might as well
have some transparency on how to choose a new RmgrId.

I also updated the patch to point to the wiki page in the comments, and
added in a new RM_EXPERIMENTAL_ID that can be used while an extension
is still in development. Hopefully this will prevent people reserving
lots of RmgrIds for extensions that never get released.

Regards,
	Jeff Davis