Revert "SERVER-40755 Expose statistics which indicate how many collection scans have executed"

This reverts commit a4ef14ef41f0700ef07e5b57b0345d2396a44604.

1 files changed, 0 insertions, 21 deletions

diff --git a/src/mongo/db/pipeline/document_source_coll_stats.cpp b/src/mongo/db/pipeline/document_source_coll_stats.cpp
index a02a6018231..df6063dad52 100644
--- a/src/mongo/db/pipeline/document_source_coll_stats.cpp
+++ b/src/mongo/db/pipeline/document_source_coll_stats.cpp
@@ -85,17 +85,6 @@ intrusive_ptr<DocumentSource> DocumentSourceCollStats::createFromBson(
                                   << " of type "
                                   << typeName(elem.type()),
                     elem.type() == BSONType::Object);
-        } else if ("queryExecStats" == fieldName) {
-            uassert(31141,
-                    str::stream() << "queryExecStats argument must be an empty object, but got "
-                                  << elem
-                                  << " of type "
-                                  << typeName(elem.type()),
-                    elem.type() == BSONType::Object);
-            uassert(31170,
-                    str::stream() << "queryExecStats argument must be an empty object, but got "
-                                  << elem,
-                    elem.embeddedObject().isEmpty());
         } else {
             uasserted(40168, str::stream() << "unrecognized option to $collStats: " << fieldName);
         }
@@ -160,16 +149,6 @@ DocumentSource::GetNextResult DocumentSourceCollStats::getNext() {
         }
     }
 
-    if (_collStatsSpec.hasField("queryExecStats")) {
-        Status status = pExpCtx->mongoProcessInterface->appendQueryExecStats(
-            pExpCtx->opCtx, pExpCtx->ns, &builder);
-        if (!status.isOK()) {
-            uasserted(31142,
-                      str::stream() << "Unable to retrieve queryExecStats in $collStats stage: "
-                                    << status.reason());
-        }
-    }
-
     return {Document(builder.obj())};
 }