Remove deprecated Connection methods

UPGRADE.md

 # Upgrade to 3.0
 
+## BC BREAK: Changes in the `Doctrine\DBAL\Connection` API
+
+- The following methods have been removed as leaking internal implementation details: `::getHost()`, `::getPort()`, `::getUsername()`, `::getPassword()`.
+
 ## BC BREAK: Changes in the `Doctrine\DBAL\Event` API
 
 - `ConnectionEventArgs::getDriver()`, `::getDatabasePlatform()` and `::getSchemaManager()` methods have been removed. The connection information can be obtained from the connection which is available via `::getConnection()`.

src/Connection.php

@@ -216,54 +216,6 @@ class Connection implements DriverConnection
         return $database;
     }
 
-    /**
-     * Gets the hostname of the currently connected database.
-     *
-     * @deprecated
-     *
-     * @return string|null
-     */
-    public function getHost()
-    {
-        return $this->params['host'] ?? null;
-    }
-
-    /**
-     * Gets the port of the currently connected database.
-     *
-     * @deprecated
-     *
-     * @return mixed
-     */
-    public function getPort()
-    {
-        return $this->params['port'] ?? null;
-    }
-
-    /**
-     * Gets the username used by this connection.
-     *
-     * @deprecated
-     *
-     * @return string|null
-     */
-    public function getUsername()
-    {
-        return $this->params['user'] ?? null;
-    }
-
-    /**
-     * Gets the password used by this connection.
-     *
-     * @deprecated
-     *
-     * @return string|null
-     */
-    public function getPassword()
-    {
-        return $this->params['password'] ?? null;
-    }
-
     /**
      * Gets the DBAL driver instance.
      *

src/Schema/DB2SchemaManager.php

@@ -28,8 +28,7 @@ class DB2SchemaManager extends AbstractSchemaManager
      */
     public function listTableNames()
     {
-        $sql  = $this->_platform->getListTablesSQL();
-        $sql .= ' AND CREATOR = UPPER(' . $this->_conn->quote($this->_conn->getUsername()) . ')';
+        $sql = $this->_platform->getListTablesSQL() . ' AND CREATOR = CURRENT_USER';
 
         $tables = $this->_conn->fetchAllAssociative($sql);
 

tests/ConnectionTest.php

@@ -108,26 +108,6 @@ class ConnectionTest extends TestCase
         self::assertInstanceOf(Configuration::class, $config);
     }
 
-    public function testGetHost(): void
-    {
-        self::assertEquals('localhost', $this->connection->getHost());
-    }
-
-    public function testGetPort(): void
-    {
-        self::assertEquals('1234', $this->connection->getPort());
-    }
-
-    public function testGetUsername(): void
-    {
-        self::assertEquals('root', $this->connection->getUsername());
-    }
-
-    public function testGetPassword(): void
-    {
-        self::assertEquals('password', $this->connection->getPassword());
-    }
-
     public function testGetDriver(): void
     {
         self::assertInstanceOf(\Doctrine\DBAL\Driver\PDOMySql\Driver::class, $this->connection->getDriver());

tests/Functional/Schema/OracleSchemaManagerTest.php

@@ -236,7 +236,7 @@ class OracleSchemaManagerTest extends SchemaManagerFunctionalTestCase
         $otherTable->addColumn('id', Types::STRING);
         TestUtil::getPrivilegedConnection()->getSchemaManager()->dropAndCreateTable($otherTable);
 
-        $columns = $this->schemaManager->listTableColumns($table->getName(), $this->connection->getUsername());
+        $columns = $this->schemaManager->listTableColumns($table->getName(), $this->connection->getDatabase());
         self::assertCount(7, $columns);
     }