Is it safe to use this command just like that, even though the table might be referenced from other tables as foreign key?
ALTER INDEX foo_pkey RENAME TO pk__foo__id;
I have just tried it and it seems OK, but I have heard it is necessary to drop foreign keys, rename pkey (drop/recreate) and re-reference the table again.
In case it is not that easy, is there a way how to find all referencing tables, drop their fkeys, alter the index and atach them again in one SQL?
Here is what I am using to find tables and their fkeys referencing my table:
SELECT tc.table_name, tc.constraint_name, kcu.column_name, ccu.table_name AS foreign_table_name, ccu.column_name AS foreign_column_name FROM information_schema.table_constraints AS tc JOIN information_schema.key_column_usage AS kcu ON tc.constraint_name = kcu.constraint_name JOIN information_schema.constraint_column_usage AS ccu ON ccu.constraint_name = tc.constraint_name WHERE constraint_type = 'FOREIGN KEY' AND ccu.table_name ='foo';