upgrade(index): Add the code for upgrading rocksdb-4.13 to rocksdb-6.12.6.(#10) (#69)

* Add the code for upgrading rocksdb-4.13 to rocksdb-6.12.6

storage/stonedb/index/kv_store.cpp

@@ -45,9 +45,10 @@ void KVStore::Init() {
   db_option.statistics = rocksdb::CreateDBStatistics();
   // get column family names from manfest file
   rocksdb::Status status = rocksdb::DB::ListColumnFamilies(db_option, rocksdb_datadir, &cf_names);
-  if (!status.ok() && status.subcode() == rocksdb::Status::kNone) {
-    STONEDB_LOG(LogCtl_Level::INFO, "First init rocksdb, create default cloum family");
-    cf_names.push_back(DEFAULT_CF_NAME);
+  if (!status.ok() && ((status.subcode() == rocksdb::Status::kNone) || (status.subcode() == rocksdb::Status::kPathNotFound)) )
+  {
+      STONEDB_LOG(LogCtl_Level::INFO, "First init rocksdb, create default cloum family");
+      cf_names.push_back(DEFAULT_CF_NAME);
   }
 
   rocksdb::ColumnFamilyOptions rs_cf_option(options);