按照 Mediawiki 的說法, MySQL 轉 PostgreSQL 很簡單,但是 PostgreSQL 轉回 MySQL 不容易:https://blog.phpbb.com/2014/02/10/phpbb-3-1-alpha3-preview-release/ 寫: PHP version 5.3.3 or greater
PHP’s json extension
Only PostgreSQL versions 8.3 and above are supported
Mediawiki 須要 MariaDB,phpBB 吵著要 PostgreSQL,傷腦筋~~~http://www.mediawiki.org/wiki/Manual:PostgreSQL 寫: From PostgreSQL to MySQL
This is generally not recommended as converting from Postgres data types back to MySQL is not as simple an operation as the reverse.