SERVER-62610 Add a function to the durable catalog to fetch all index idents for a catalog entry

3 files changed, 25 insertions, 0 deletions

diff --git a/src/mongo/db/storage/durable_catalog.h b/src/mongo/db/storage/durable_catalog.h
index 24c61455531..1f3c25e145d 100644
--- a/src/mongo/db/storage/durable_catalog.h
+++ b/src/mongo/db/storage/durable_catalog.h
@@ -81,6 +81,8 @@ public:
                                       RecordId id,
                                       StringData idxName) const = 0;
 
+    virtual std::vector<std::string> getIndexIdents(OperationContext* opCtx, RecordId id) const = 0;
+
     virtual BSONObj getCatalogEntry(OperationContext* opCtx, RecordId catalogId) const = 0;
 
     virtual std::shared_ptr<BSONCollectionCatalogEntry::MetaData> getMetaData(
diff --git a/src/mongo/db/storage/durable_catalog_impl.cpp b/src/mongo/db/storage/durable_catalog_impl.cpp
index fa5d38bb9f2..3fd2766f798 100644
--- a/src/mongo/db/storage/durable_catalog_impl.cpp
+++ b/src/mongo/db/storage/durable_catalog_impl.cpp
@@ -403,6 +403,27 @@ std::string DurableCatalogImpl::getIndexIdent(OperationContext* opCtx,
     return idxIdent[idxName].String();
 }
 
+std::vector<std::string> DurableCatalogImpl::getIndexIdents(OperationContext* opCtx,
+                                                            RecordId catalogId) const {
+    std::vector<std::string> idents;
+
+    BSONObj obj = _findEntry(opCtx, catalogId);
+    if (obj["idxIdent"].eoo()) {
+        // No index entries for this catalog entry.
+        return idents;
+    }
+
+    BSONObj idxIdent = obj["idxIdent"].Obj();
+
+    BSONObjIterator it(idxIdent);
+    while (it.more()) {
+        BSONElement elem = it.next();
+        idents.push_back(elem.String());
+    }
+
+    return idents;
+}
+
 BSONObj DurableCatalogImpl::_findEntry(OperationContext* opCtx, RecordId catalogId) const {
     LOGV2_DEBUG(22208, 3, "looking up metadata for: {catalogId}", "catalogId"_attr = catalogId);
     RecordData data;
diff --git a/src/mongo/db/storage/durable_catalog_impl.h b/src/mongo/db/storage/durable_catalog_impl.h
index 264130a8536..63732d5846f 100644
--- a/src/mongo/db/storage/durable_catalog_impl.h
+++ b/src/mongo/db/storage/durable_catalog_impl.h
@@ -72,6 +72,8 @@ public:
                               RecordId catalogId,
                               StringData idxName) const;
 
+    std::vector<std::string> getIndexIdents(OperationContext* opCtx, RecordId catalogId) const;
+
     BSONObj getCatalogEntry(OperationContext* opCtx, RecordId catalogId) const {
         return _findEntry(opCtx, catalogId);
     }