SERVER-16444 Copy data in the query subsystem as needed.

A WorkingSetMember in the LOC_AND_OBJ state must be made owned when:

  1. Its WorkingSetID is cached across multiple calls to work().

  2. Multiple calls to next(), seekExact(), saveState(), etc. are
     performed on the same WiredTiger cursor in a single work() call.

No longer necessary to always copy data out of WiredTiger buffers.

1 files changed, 3 insertions, 4 deletions

diff --git a/src/mongo/db/commands/pipeline_command.cpp b/src/mongo/db/commands/pipeline_command.cpp
index b348f8c3c84..0332d783266 100644
--- a/src/mongo/db/commands/pipeline_command.cpp
+++ b/src/mongo/db/commands/pipeline_command.cpp
@@ -98,11 +98,10 @@ static bool handleCursorCommand(OperationContext* txn,
             break;
         }
 
+        // If adding this object will cause us to exceed the BSON size limit, then we stash it for
+        // later.
         if (resultsArray.len() + next.objsize() > byteLimit) {
-            // Get the pipeline proxy stage wrapped by this PlanExecutor.
-            PipelineProxyStage* proxy = static_cast<PipelineProxyStage*>(exec->getRootStage());
-            // too big. next will be the first doc in the second batch
-            proxy->pushBack(next);
+            exec->enqueue(next);
             break;
         }