hibernate/hibernate-orm · error · IdentifierGenerationException

Unknown integral data type for ids :

Error message

Unknown integral data type for ids : 

What it means

Error "Unknown integral data type for ids : " thrown in hibernate/hibernate-orm.

Source

Thrown at hibernate-core/src/main/java/org/hibernate/id/IdentifierGeneratorHelper.java:81

				|| integralType == Long.TYPE ) {
			return value;
		}
		else if ( integralType == Integer.class
				|| integralType == Integer.TYPE ) {
			return (int) value;
		}
		else if ( integralType == Short.class
				|| integralType == Short.TYPE ) {
			return (short) value;
		}
		else if ( integralType == BigInteger.class ) {
			return BigInteger.valueOf( value );
		}
		else if ( integralType == BigDecimal.class ) {
			return BigDecimal.valueOf( value );
		}
		else {
			throw new IdentifierGenerationException(
					"Unknown integral data type for ids : " + integralType.getName()
			);
		}
	}

	public static long extractLong(ResultSet resultSet, long defaultValue) throws SQLException {
		final long value = resultSet.getLong( 1 );
		return resultSet.wasNull() ? defaultValue : value;
	}

	public static void bindLong(PreparedStatement preparedStatement, int position, long value) throws SQLException {
		CORE_LOGGER.tracef( "binding parameter [%s] - [%s]", position, value );
		preparedStatement.setLong( position, value );
	}

	public static Object getForeignId(
			String entityName, String propertyName, SharedSessionContractImplementor sessionImplementor, Object object) {
		if ( sessionImplementor.isManaged( object ) ) {

View on GitHub (pinned to fad1729dce)

Solutions

1. Use a supported integral id type (short, int, long, or their wrappers/BigInteger) for the identifier.

When it happens

Trigger: Thrown when an identifier generator produces or is asked for a Java type it does not support.

Common situations: Typical situations: mapping a numeric id to an unsupported type; a UUID generator configured with a non-UUID return type.

AI-assisted analysis of hibernate/hibernate-orm@fad1729dce (2026-08-22). Data as JSON: /api/errors/a047b583d627da84. Report an issue: GitHub.