SERVER-46781 Remove v4.4 FCV handling for collection and index catalog entry 'ns' field

1 files changed, 0 insertions, 26 deletions

diff --git a/src/mongo/db/storage/bson_collection_catalog_entry.cpp b/src/mongo/db/storage/bson_collection_catalog_entry.cpp
index 1e016ff8f40..976c8123afc 100644
--- a/src/mongo/db/storage/bson_collection_catalog_entry.cpp
+++ b/src/mongo/db/storage/bson_collection_catalog_entry.cpp
@@ -140,32 +140,6 @@ bool BSONCollectionCatalogEntry::MetaData::eraseIndex(StringData name) {
     return true;
 }
 
-void BSONCollectionCatalogEntry::MetaData::rename(StringData toNS) {
-    ns = toNS.toString();
-
-    // In FCV 4.4, the 'ns' field is not present. Only rename the 'ns' field for each index in
-    // FCV 4.2.
-    if (serverGlobalParams.featureCompatibility.isVersionInitialized() &&
-        serverGlobalParams.featureCompatibility.getVersion() ==
-            ServerGlobalParams::FeatureCompatibility::Version::kFullyUpgradedTo44) {
-        return;
-    }
-
-    for (size_t i = 0; i < indexes.size(); i++) {
-        BSONObj spec = indexes[i].spec;
-        BSONObjBuilder b;
-        // Add the fields in the same order they were in the original specification.
-        for (auto&& elem : spec) {
-            if (elem.fieldNameStringData() == "ns") {
-                b.append("ns", toNS);
-            } else {
-                b.append(elem);
-            }
-        }
-        indexes[i].spec = b.obj();
-    }
-}
-
 KVPrefix BSONCollectionCatalogEntry::MetaData::getMaxPrefix() const {
     // Use the collection prefix as the initial max value seen. Then compare it with each index
     // prefix. Note the oplog has no indexes so the vector of 'IndexMetaData' may be empty.