IntegrityConstraintViolationException.php

<?php

/**
 * @file
 * Definition of Drupal\Core\Database\IntegrityConstraintViolationException
 */
namespace Drupal\Core\Database;

use RuntimeException;

/**
 * Exception thrown if a query would violate an integrity constraint.
 *
 * This exception is thrown e.g. when trying to insert a row that would violate
 * a unique key constraint.
 */
class IntegrityConstraintViolationException extends RuntimeException implements DatabaseException {

}