Hello Hackers,
I recently had to work on a case where some catalog files were corrupt and/or missing. One of the things we sought to inspect was pg_filenode.map, but there was no tooling available to do so.
With the help of Álvaro H.. I've put together a patch to allow pg_filedump to do some rudimentary decoding of pg_filenode.map, so that it's at least human-readable. I had the idea to try to map the OIDs to relnames, but that might get hairy, with TOAST table OIDs possibly changing (for pg_proc, etc.)
It seems that Christoph Berg is the primary committer for the pg_filedump project these days so he is cc'd here, but if there's some other place I should be sending this kind of contribution to, please let me know. Hopefully this will be helpful to others in the future.
Much appreciated,
--Richard
