Hi,

we are running the latest Openproject Version which supports mysql:
OpenProject 9.0.4 (Mysql2)

We are trying updating to the latest version with postgres.

There for we using this documentation: https://www.openproject.org/docs/installation-and-operations/misc/upgrading-older-openproject-versions/

However we running the script, at the end of the day we receive an sql file ("openproject-mysql-dump-8.sql") which we cannot import. The content of this file seems like a mysql dump. The header of this file is

-- MySQL dump 10.13  Distrib 5.6.51, for Linux (x86_64)
--
-- Host: localhost    Database: openproject
-- ------------------------------------------------------
-- Server version	5.6.51

/*!40101 SET @OLD_CHARACTER_SET_CLIENT=@@CHARACTER_SET_CLIENT */;
/*!40101 SET @OLD_CHARACTER_SET_RESULTS=@@CHARACTER_SET_RESULTS */;
/*!40101 SET @OLD_COLLATION_CONNECTION=@@COLLATION_CONNECTION */;
/*!40101 SET NAMES utf8 */;
/*!40103 SET @OLD_TIME_ZONE=@@TIME_ZONE */;
/*!40103 SET TIME_ZONE='+00:00' */;
/*!40014 SET @OLD_UNIQUE_CHECKS=@@UNIQUE_CHECKS, UNIQUE_CHECKS=0 */;
/*!40014 SET @OLD_FOREIGN_KEY_CHECKS=@@FOREIGN_KEY_CHECKS, FOREIGN_KEY_CHECKS=0 */;
/*!40101 SET @OLD_SQL_MODE=@@SQL_MODE, SQL_MODE='NO_AUTO_VALUE_ON_ZERO' */;
/*!40111 SET @OLD_SQL_NOTES=@@SQL_NOTES, SQL_NOTES=0 */;

--
-- Table structure for table `announcements`
--

DROP TABLE IF EXISTS `announcements`;
/*!40101 SET @saved_cs_client     = @@character_set_client */;
/*!40101 SET character_set_client = utf8 */;
CREATE TABLE `announcements` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `text` text,
  `show_until` date DEFAULT NULL,
  `active` tinyint(1) DEFAULT '0',
  `created_at` datetime DEFAULT NULL,
  `updated_at` datetime DEFAULT NULL,
  PRIMARY KEY (`id`),
  KEY `index_announcements_on_show_until_and_active` (`show_until`,`active`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1;
/*!40101 SET character_set_client = @saved_cs_client */;
....

Can somebody help us? We are working very long to make this upgrade happen.

Please let me know if you need more information to support us.

Thanks in advance for your support.

Best Regards

Ming