Does PostgreSQL use pg_largeobject table internally?

Question

I want to clean all large objects created by users and I'm using the following script:

SELECT lo_unlink(l.loid) FROM pg_largeobject l

Is it safe operation? Does postgresql use large objects for it's internal use? Thanks.

Answer 1

That is quite safe as far as PostgreSQL is concerned.

It is always OK to select from a system catalog, and lo_unlink is safe.

PostgreSQL doesn't use large objects internally.