invalid role specification
SQLSTATE 0P000 is raised when a role name specified in a command does not exist in the database cluster. This commonly occurs in GRANT, REVOKE, ALTER, SET ROLE, or connection parameters.
- 1GRANT or REVOKE specifying a role name that does not exist
- 2SET ROLE to a role the current session user is not a member of
- 3CREATE TABLE ... OWNER specifying a non-existent role
Granting privileges to a role that does not exist.
GRANT SELECT ON employees TO nonexistent_role;
expected output
ERROR: role "nonexistent_role" does not exist
Fix 1
Create the role before referencing it
WHEN When the role is new and has not been created yet.
CREATE ROLE analyst; GRANT SELECT ON employees TO analyst;
Why this works
Creating the role first ensures it exists in pg_roles before privilege commands reference it.
Fix 2
List existing roles to confirm the correct name
WHEN When a typo or naming convention mismatch is suspected.
SELECT rolname FROM pg_roles ORDER BY rolname;
Why this works
Querying pg_roles shows all roles in the cluster; use the exact name in subsequent GRANT commands.
Class 0P — Invalid Role Specification
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