Raised when a GRANT or REVOKE statement requests a privilege that is not valid for the specified object or that the caller cannot grant.
invalid_grant_operation (SQLSTATE 0LP01) occurs when a GRANT or REVOKE command tries to assign a privilege PostgreSQL does not allow on the target object, or when the caller lacks the underlying right. Match privileges to object type or run the command as a superuser to resolve the error.
PostgreSQL invalid_grant_operation
The 0LP01 invalid_grant_operation error appears when PostgreSQL validates a GRANT or REVOKE statement and finds a privilege that cannot be applied to the chosen object or role.
The server cancels the statement to keep the privilege catalog consistent, returning: “ERROR: 0LP01: invalid grant operation”.
Fixing the mismatch or using the correct grantor resolves the issue quickly.
Unsupported privilege - Specifying EXECUTE on a TABLE, or SELECT on a FUNCTION, triggers the error because those privileges are not defined for that object type.
Missing privilege with WITH GRANT OPTION - Requesting WITH GRANT OPTION without already holding the base privilege fails validation.
Object class without privileges - Some object types (for example, publications) do not support GRANT at all, leading to the error when included in a GRANT list.
Step 1 - Identify the object’s class (TABLE, SEQUENCE, FUNCTION, SCHEMA) and check the documented privilege matrix.
Step 2 - Remove or move unsupported privileges to a statement that targets the correct object class.
Step 3 - Ensure the grantor role already possesses the requested privilege, or run the command as a superuser or object owner.
Scenario: GRANT EXECUTE ON TABLE users TO app_role; Result: 0LP01.
Solution: GRANT EXECUTE ON FUNCTION get_users() TO app_role;
Scenario: GRANT SELECT, UPDATE ON FUNCTION update_user TO analyst; Result: 0LP01.
Solution: GRANT EXECUTE ON FUNCTION update_user TO analyst; GRANT SELECT, UPDATE ON TABLE users TO analyst;
Check privilege validity with \h GRANT in psql or the official docs before executing statements.
Use separate GRANT blocks for tables, functions, sequences, and schemas to keep privilege lists unambiguous.
Create group roles that aggregate privileges, then grant user roles membership to those groups rather than issuing many ad-hoc GRANT commands.
42501 insufficient_privilege - Occurs when the issuing role lacks permission to grant.
Fix by granting the base privilege first or switching to a higher-privileged role.
0L000 invalid_grantor - Raised when the GRANTOR clause names a role without the privilege. Use a valid grantor or omit the clause.
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Granting EXECUTE on a table or SELECT on a function violates PostgreSQL’s privilege matrix and triggers invalid_grant_operation.
PostgreSQL refuses to let a role pass on a privilege it does not already possess with grant option.
Certain classes (publications, transforms) do not participate in the privilege system.
Any GRANT targeting them raises 0LP01.
Misspelled privilege keywords cause PostgreSQL to treat the privilege as invalid for the object, resulting in the error.
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No. EXECUTE applies only to functions, procedures, and prepared statements. Granting it on tables triggers invalid_grant_operation.
You must hold the underlying privilege with grant option yourself. Grant it to your role first, then reissue the command.
The error code is consistent across supported versions, but new object types may add or remove valid privileges in future releases.
Galaxy’s context-aware autocomplete shows only privileges valid for the highlighted object, preventing invalid combinations before execution.
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