hibernate/hibernate-orm · error · SemanticException

Illegal unit " + this

Error message

Illegal unit " + this

What it means

Error "Illegal unit " + this" thrown in hibernate/hibernate-orm.

Source

Thrown at hibernate-core/src/main/java/org/hibernate/query/common/TemporalUnit.java:349

	 * durations.
	 */
	public TemporalUnit normalized() {
		switch (this) {
			case NANOSECOND:
			case NATIVE:
			case HOUR:
			case MINUTE:
			case SECOND:
			case EPOCH:
			case DAY:
			case WEEK:
				return NANOSECOND;
			case YEAR:
			case QUARTER:
			case MONTH:
				return MONTH;
			default:
				throw new SemanticException("Illegal unit " + this);
		}
	}

	@Override
	public String toString() {
		return super.toString().toLowerCase();
	}
}

View on GitHub (pinned to fad1729dce)

Solutions

1. Use a supported TemporalUnit in this context.
2. Check the unit against the database dialect's supported units.

When it happens

Trigger: A runtime precondition of the Hibernate API is violated.

Common situations: Occurs when application code or configuration does not satisfy the documented contract of the API being called.

AI-assisted analysis of hibernate/hibernate-orm@fad1729dce (2026-08-22). Data as JSON: /api/errors/8fa41a266c654134. Report an issue: GitHub.