PostgresDB 0P000: Invalid Role Specification

Specified role is invalid.
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PostgresDB 0P000: Invalid Role Specification

 ?

When encountering the error 0P000: Invalid Role Specification from a Postgres database, follow these specific actions:

  1. Check the Role Exists: Verify if the role mentioned in the error (or the context of the operation) exists by running:
  2. SELECT rolname FROM pg_roles WHERE rolname = 'your_role_name';
  3. Replace 'your_role_name' with the actual role name you are trying to use or was mentioned in the error.
  4. Review Role Permissions: If the role exists, check the permissions of the role to ensure it has the necessary privileges for the operation you are attempting. Use:
  5. \du+ your_role_name
  6. This PostgreSQL command provides detailed information about user roles, including their permissions. Look for any missing rights related to your operation.
  7. Inspect Role Membership: If the role has the correct permissions, ensure the user attempting the operation is a member of the role (if applicable). Check role membership with:
  8. SELECT rolname FROM pg_roles r JOIN pg_auth_members m ON r.oid = m.roleid JOIN pg_roles u ON m.member = u.oid WHERE u.rolname = 'your_user_name';
  9. Replace 'your_user_name' with the username of the person experiencing the error. This command lists all roles that the user is a member of.
  10. Check for Typos or Misconfigurations: Ensure there are no typos in the role name or misunderstandings about the role's configuration in any database commands, scripts, or connection strings you are using.

Execute these actions sequentially, adjusting queries as necessary based on your specific context (e.g., replacing placeholder values with actual role or user names). Each step is designed to isolate and identify common roots of the Invalid Role Specification error, aiding in resolution without a database administrator.

Attached error: 
PostgresDB 0P000: Invalid Role Specification
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