In order to import some data from a PostgreSQL database to Drupal I added another entry to the databases array in settings.php.
After updating the modules and executing update.php Drupal returns this PHP error:
PHP Fatal error: Class 'DatabaseTasks_postgresql' not found in sites/www/html/includes/install.inc on line 1331.
I suspect that deleting the PostgreSQL database from settings.php will cause the error to go away, but I don’t want to be doing that every time I run update.php.
Is it a known bug or are there some dependencies I need to to install? The installation is a MySQL system so there doesn’t seem to be a reason why install.inc might want to use it. Are there some additional settings in the database array entry that are required?
UPDATE: After deleting the PostgreSQLdatabase from settings.php the problem still remains so it might be something else.