Merge pull request #851 from Brammm-forks/3.20.x

Updated docs a little

Author: DavidBadura

docs/pages/getting_started.md

@@ -327,6 +327,14 @@ $hotelRepository = $repositoryManager->get(Hotel::class);
 !!! note
 
     You can find out more about stores [here](store.md).
+
+!!! note
+
+    The `RunSubscriptionEngineRepositoryManager` is a decorator that triggers the 
+    Subscription Engine when an Aggregate is saved. Normally, you'd use the 
+    `DefaultRepositoryManager` and a worker to run the Subscription Engine.
+    
+    Learn more [here](subscription.md).
 
 ## Database setup
 

docs/pages/subscription.md

@@ -75,7 +75,7 @@ final class ProfileProjector
 ```
 !!! warning
 
-    MySQL and MariaDB don't support transactions for DDL statements.
+    PostgreSQL, MySQL and MariaDB don't support transactions for DDL statements.
     So you must use a different database connection for your subscriptions.
 
 !!! tip
@@ -327,7 +327,7 @@ final class ProfileProjector
 ```
 !!! danger
 
-    MySQL and MariaDB don't support transactions for DDL statements.
+    PostgreSQL, MySQL and MariaDB don't support transactions for DDL statements.
     So you must use a different database connection in your projectors, 
     otherwise you will get an error when the subscription tries to create the table.
 
@@ -368,7 +368,7 @@ final class ProfileProjector
 ```
 !!! danger
 
-    MySQL and MariaDB don't support transactions for DDL statements.
+    PostgreSQL, MySQL and MariaDB don't support transactions for DDL statements.
     So you must use a different database connection in your projectors, 
     otherwise you will get an error when the subscription tries to create the table.