test mysql transactions in a oxid eShop v6.0.x

testTransactions.php

<?php
/**
 * place this gist in a file in folder source/ of a oxid-esales v6.0.0
 */
use OxidEsales\Eshop\Core\DatabaseProvider;

require_once dirname(__FILE__) . "/bootstrap.php";

// tldr: 1. uncommitted  MySQL transactions, will not commit queries with warning.
//       2. auto_increment will always be set (even in a rollback)

//NOTE: the INSERT INTO queries will produce a warning:
//      Warning: Incorrect integer value: '' for column 'id' at row 1

$tablename = 'd3testlog_'.date('Y_m_d_his');
DatabaseProvider::getDb()->execute("CREATE TABLE {$tablename} ( id INT(6) UNSIGNED AUTO_INCREMENT PRIMARY KEY) ");
DatabaseProvider::getDb()->startTransaction();
//1 - will be backrolled
DatabaseProvider::getDb()->execute("INSERT INTO {$tablename} VALUES ('') ");
//2 - will be backrolled
DatabaseProvider::getDb()->execute("INSERT INTO {$tablename} VALUES ('') ");
DatabaseProvider::getDb()->rollbackTransaction();
//3 - will be written
DatabaseProvider::getDb()->execute("INSERT INTO {$tablename} VALUES ('') ");
DatabaseProvider::getDb()->startTransaction();
//4 - will be written
DatabaseProvider::getDb()->execute("INSERT INTO {$tablename} VALUES ('') ");
DatabaseProvider::getDb()->commitTransaction();
//5 - will be written
DatabaseProvider::getDb()->execute("INSERT INTO {$tablename} VALUES ('') ");
DatabaseProvider::getDb()->startTransaction();
//6 - will NOT written in table
DatabaseProvider::getDb()->execute("INSERT INTO {$tablename} VALUES ('') ");

//Result:
// [id] 
//   3
//   4
//   5
// auto_increment of id is 6