PostgreSQL Error 0L000: invalid grantor
The 0L000 invalid grantor error in PostgreSQL occurs when a user attempts to grant privileges on a database object without having the proper authority to do so. Specifically, this happens when the grantor does not own the object and does not hold the relevant privilege WITH GRANT OPTION. This error is commonly encountered in complex multi-tenant environments or role-based access control systems where privilege delegation chains are involved.
Top 3 Causes
1. Attempting to Re-Grant a Privilege Without GRANT OPTION
The most frequent cause: a user received a privilege but without WITH GRANT OPTION, and then tries to pass that privilege on to another user.
