Re: Refactoring psql for backward-compatibility

David Fetter wrote:

>
>I'd much appeciate tips, specific RTFMs and feedback on this so I can
>get cracking on a patch.
>
>
>  
>

well, before you even start on a patch we should have agreement that 
this is a good idea, and an agreed design.

This is really an m * n problem. That's what does indeed make it a 
maintenance nightmare. A new version of psql implements a new command 
and suddenly we have to provide compatibility versions (if possible) for 
m server versions back. Repeat for n versions of psql.

One way might to have some loadable SPs that correspond to the slash 
commands for a particular psql version, and have psql search for those 
on startup, and use them in preference to its builtin versions. But it 
would be mighty messy.

I am really not sure it's worth the effort. Just testing would be a pain 
(buildfarm could not do it, as it now stands, at least).


cheers

andrew