# Which Problems Are Solved
Add the possibility to filter project resources based on project member
roles.
# How the Problems Are Solved
Extend and refactor existing Pl/PgSQL functions to implement the
following:
- Solve O(n) complexity in returned resources IDs by returning a boolean
filter for instance level permissions.
- Individually permitted orgs are returned only if there was no instance
permission
- Individually permitted projects are returned only if there was no
instance permission
- Because of the multiple filter terms, use `INNER JOIN`s instead of
`WHERE` clauses.
# Additional Changes
- system permission function no longer query the organization view and
therefore can be `immutable`, giving big performance benefits for
frequently reused system users. (like our hosted login in Zitadel cloud)
- The permitted org and project functions are now defined as `stable`
because the don't modify on-disk data. This might give a small
performance gain
- The Pl/PgSQL functions are now tested using Go unit tests.
# Additional Context
- Depends on https://github.com/zitadel/zitadel/pull/9677
- Part of https://github.com/zitadel/zitadel/issues/9188
- Closes https://github.com/zitadel/zitadel/issues/9190
