ExceptionHandler.php

<?php

namespace Drupal\mysql\Driver\Database\mysql;

use Drupal\Component\Utility\Unicode;
use Drupal\Core\Database\DatabaseExceptionWrapper;
use Drupal\Core\Database\ExceptionHandler as BaseExceptionHandler;
use Drupal\Core\Database\IntegrityConstraintViolationException;
use Drupal\Core\Database\StatementInterface;

/**
 * MySql database exception handler class.
 */
class ExceptionHandler extends BaseExceptionHandler {
    
    /**
     * {@inheritdoc}
     */
    public function handleExecutionException(\Exception $exception, StatementInterface $statement, array $arguments = [], array $options = []) : void {
        if (array_key_exists('throw_exception', $options)) {
            @trigger_error('Passing a \'throw_exception\' option to ' . __METHOD__ . ' is deprecated in drupal:9.2.0 and is removed in drupal:10.0.0. Always catch exceptions. See https://www.drupal.org/node/3201187', E_USER_DEPRECATED);
            if (!$options['throw_exception']) {
                return;
            }
        }
        if ($exception instanceof \PDOException) {
            // Wrap the exception in another exception, because PHP does not allow
            // overriding Exception::getMessage(). Its message is the extra database
            // debug information.
            $code = is_int($exception->getCode()) ? $exception->getCode() : 0;
            // If a max_allowed_packet error occurs the message length is truncated.
            // This should prevent the error from recurring if the exception is logged
            // to the database using dblog or the like.
            if (($exception->errorInfo[1] ?? NULL) === 1153) {
                $message = Unicode::truncateBytes($exception->getMessage(), Connection::MIN_MAX_ALLOWED_PACKET);
                throw new DatabaseExceptionWrapper($message, $code, $exception);
            }
            $message = $exception->getMessage() . ": " . $statement->getQueryString() . "; " . print_r($arguments, TRUE);
            // SQLSTATE 23xxx errors indicate an integrity constraint violation. Also,
            // in case of attempted INSERT of a record with an undefined column and no
            // default value indicated in schema, MySql returns a 1364 error code.
            if (substr($exception->getCode(), -6, -3) == '23' || ($exception->errorInfo[1] ?? NULL) === 1364) {
                throw new IntegrityConstraintViolationException($message, $code, $exception);
            }
            throw new DatabaseExceptionWrapper($message, 0, $exception);
        }
        throw $exception;
    }

}