Fixes for PR [#8267]

* Fix Migration#reversible by not using `transaction`.

* Adapt mysql adapter to updated api for remove_column

* Update test after aedcd683684d08eaf30623a4b48ce31a31426372

1 files changed, 10 insertions, 1 deletions

diff --git a/activerecord/lib/active_record/migration.rb b/activerecord/lib/active_record/migration.rb
index 273af32237..67339c05e5 100644
--- a/activerecord/lib/active_record/migration.rb
+++ b/activerecord/lib/active_record/migration.rb
@@ -477,7 +477,7 @@ module ActiveRecord
     #    end
     def reversible
       helper = ReversibleBlockHelper.new(reverting?)
-      transaction{ yield helper }
+      execute_block{ yield helper }
     end
 
     # Runs the given migration classes.
@@ -639,6 +639,15 @@ module ActiveRecord
         "%.3d" % number
       end
     end
+
+    private
+    def execute_block
+      if connection.respond_to? :execute_block
+        super # use normal delegation to record the block
+      else
+        yield
+      end
+    end
   end
 
   # MigrationProxy is used to defer loading of the actual migration classes