SERVER-33359: Allow RTT storage engines to manage indexes on rollback.

1 files changed, 4 insertions, 0 deletions

diff --git a/src/mongo/db/storage/bson_collection_catalog_entry.cpp b/src/mongo/db/storage/bson_collection_catalog_entry.cpp
index 57440d12e4d..9703e5f1a89 100644
--- a/src/mongo/db/storage/bson_collection_catalog_entry.cpp
+++ b/src/mongo/db/storage/bson_collection_catalog_entry.cpp
@@ -278,6 +278,7 @@ BSONObj BSONCollectionCatalogEntry::MetaData::toBSON() const {
 
             sub.append("head", static_cast<long long>(indexes[i].head.repr()));
             sub.append("prefix", indexes[i].prefix.toBSONValue());
+            sub.append("backgroundSecondary", indexes[i].isBackgroundSecondaryBuild);
             sub.doneFast();
         }
         arr.doneFast();
@@ -314,6 +315,9 @@ void BSONCollectionCatalogEntry::MetaData::parse(const BSONObj& obj) {
             }
 
             imd.prefix = KVPrefix::fromBSONElement(idx["prefix"]);
+            auto bgSecondary = BSONElement(idx["backgroundSecondary"]);
+            // Opt-in to rebuilding behavior for old-format index catalog objects.
+            imd.isBackgroundSecondaryBuild = bgSecondary.eoo() || bgSecondary.trueValue();
             indexes.push_back(imd);
         }
     }