[HttpFoundation] update doc creation session table

Author: alli83

session.rst

@@ -760,6 +760,50 @@ configuration option to tell Symfony to use this service as the session handler:
             ;
         };
 
+Or you can also define it directly as follows:
+
+.. configuration-block::
+
+    .. code-block:: yaml
+
+        # config/packages/framework.yaml
+        framework:
+            session:
+                # ...
+                handler_id: '%env(resolve:DATABASE_URL)%'
+
+    .. code-block:: xml
+
+        <!-- config/packages/framework.xml -->
+        <?xml version="1.0" encoding="UTF-8" ?>
+        <container xmlns="http://symfony.com/schema/dic/services"
+            xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+            xmlns:framework="http://symfony.com/schema/dic/symfony"
+            xsi:schemaLocation="http://symfony.com/schema/dic/services
+                https://symfony.com/schema/dic/services/services-1.0.xsd
+                http://symfony.com/schema/dic/symfony
+                https://symfony.com/schema/dic/symfony/symfony-1.0.xsd">
+
+            <framework:config>
+                <!-- ... -->
+                <framework:session
+                    handler-id="%env(resolve:DATABASE_URL)%"/>
+            </framework:config>
+        </container>
+
+    .. code-block:: php
+
+        // config/packages/framework.php
+        use Symfony\Config\FrameworkConfig;
+
+        return static function (FrameworkConfig $framework) {
+            // ...
+            $framework->session()
+                ->handlerId('%env(resolve:DATABASE_URL)%')
+            ;
+        };
+
+
 Configuring the Session Table and Column Names
 ..............................................
 
@@ -857,7 +901,13 @@ Preparing the Database to Store Sessions
 ........................................
 
 Before storing sessions in the database, you must create the table that stores
-the information. The session handler provides a method called
+the information.
+
+With Doctrine installed, the session table will be automatically generated when
+you run the make:migration command if the database targeted by doctrine is identical to
+the one used by this component.
+
+Or if you prefer to create the table yourself and the table has not already been created, the session handler provides a method called
 :method:`Symfony\\Component\\HttpFoundation\\Session\\Storage\\Handler\\PdoSessionHandler::createTable`
 to set up this table for you according to the database engine used::
 
@@ -867,7 +917,9 @@ to set up this table for you according to the database engine used::
         // the table could not be created for some reason
     }
 
-If you prefer to set up the table yourself, it's recommended to generate an
+If the table already exists an exception will be thrown.
+
+If you would rather set up the table yourself, it's recommended to generate an
 empty database migration with the following command:
 
 .. code-block:: terminal
@@ -883,6 +935,10 @@ file and run the migration with the following command:
 
 .. _mysql:
 
+If needed, you can also add this table to your schema by calling
+:method:`Symfony\\Component\\HttpFoundation\\Session\\Storage\\Handler\\PdoSessionHandler::configureSchema` method
+in your code.
+
 MariaDB/MySQL
 +++++++++++++