Informix Error -442: Cannot grant permission to NULL or empty user name.

Reasons / Common Causes

-442 is a basic input-validation restriction on GRANT: the grantee's authorization identifier can't be NULL or an empty string — there has to be an actual, specific user (or role/PUBLIC) named to receive the privilege.

1. A GRANT statement built programmatically from a variable that turned out to be NULL or empty — the most common cause, from a script or application generating GRANT statements dynamically.
2. A missing or unpopulated username field in a user-provisioning workflow that generates GRANT statements as part of onboarding a new account.
3. A typo or accidental empty-string literal in a manually written GRANT statement.

Solutions / Resolution

1. Ensure a genuine, non-empty username is supplied in the GRANT ... TO clause, per the official guidance.
2. For programmatically generated GRANT statements, validate the username variable is populated before constructing the statement, rather than letting a NULL/empty value flow through silently.
3. Review the source of the username value (a provisioning workflow, user input, or a prior query result) if this appears unexpectedly, to find where the value became empty.

Examples

A programmatically generated GRANT with an unpopulated variable

-- If :new_username somehow ended up NULL or empty:
GRANT SELECT ON orders TO :new_username;
-- -442

Fix — validate before constructing the statement:

IF new_username IS NOT NULL AND new_username <> '' THEN
    -- construct and execute the GRANT statement
END IF

A correctly populated grant

GRANT SELECT ON orders TO report_user;

Diagnostic Checks

1. Check the actual value of the username variable/argument at the point the GRANT statement is constructed or executed.
2. Trace back to where that value originated — a provisioning workflow, form input, or query result — to find why it's empty.

Related Errors / Related Topics

• -299 — "Cannot grant permission to self." Another GRANT-clause grantee-validation restriction, in this case about the specific identity rather than its presence.
• -298 — "Cannot grant permission to public with grant option." Another GRANT-clause restriction in the same privilege-management family.

Validate the grantee username is genuinely populated before constructing a GRANT statement, especially in programmatically generated provisioning scripts.