The existing relationship between the connection and its statement violate the ISP principle. Instead of having access only to the execution mode of the connection, statements have access to the entire connection API.

Having a method which is not defined in the driver connection interface makes it impossible to mark the method `final` (#3590).

Remove the suppressed errors that PHPStan no longer reports

Deprecate inconsistently and ambiguously named driver-level classes

Update PHPStan to 0.12.30

The test forward-incompatible statement must be a wrapper statement, not just implement the driver-level interface

Bump Psalm level to 5

Make the $database argument of OracleSchemaManager::createDatabase() mandatory

Get rid of the call to Connection::getParams() in Portability\Statement

Remove the CommentedType class from tests

Remove Connection::$isConnected