SERVER-22541 Refactor RAII locking helpers.

Removes the class 'ScopedTransaction' and moves the responsibility of
abandoning the snapshot onto the GlobalLock class. Also renames the
AutoGetCollectionForRead class to AutoGetCollectionForReadCommand, and
adds a new AutoGetCollectionForRead class. Unlike
AutoGetCollectionForReadCommand, this new class will not update the
namespace on the CurrentOp object, nor will it add an entry to Top.

1 files changed, 0 insertions, 1 deletions

diff --git a/src/mongo/db/commands/list_collections.cpp b/src/mongo/db/commands/list_collections.cpp
index a0f998fe346..da72422b4eb 100644
--- a/src/mongo/db/commands/list_collections.cpp
+++ b/src/mongo/db/commands/list_collections.cpp
@@ -255,7 +255,6 @@ public:
             return appendCommandStatus(result, parseCursorStatus);
         }
 
-        ScopedTransaction scopedXact(opCtx, MODE_IS);
         AutoGetDb autoDb(opCtx, dbname, MODE_S);
 
         Database* db = autoDb.getDb();