On 2017-06-12 11:28:39 -0400, Neil Anderson wrote:
> I'm cross posting from general. I did some work to diagram the relationships
> in pg_catalog for v10. I would like to add it to the developer FAQ here 
> https://wiki.postgresql.org/wiki/Developer_FAQ#Is_there_a_diagram_of_the_system_catalogs_available.3F
> but I thought I should check if people thought it appropriate and useful
> before I do?
> https://www.postgrescompare.com/2017/06/11/pg_catalog_constraints.html

I wondered before if we shouldn't introduce "information only"
unenforced foreign key constraints for the catalogs.  We kind of
manually do that via oidjoins, it'd be nicer if we'd a function
rechecking fkeys, and the fkeys were in the catalog...

- Andres

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