From 39be106baa872cdee3dbf63999c083754f55f2f1 Mon Sep 17 00:00:00 2001
From: Xu Peng <xupeng3112@163.com>
Date: Tue, 30 Apr 2019 14:34:04 +0800
Subject: [PATCH] refactor(db): code optimization

Former-commit-id: 320733b50aba32e5bd99853933e7e1eafdbcdbcf
---
 cpp/src/db/DBImpl.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/cpp/src/db/DBImpl.cpp b/cpp/src/db/DBImpl.cpp
index 88bd9b8d95..859a1d75aa 100644
--- a/cpp/src/db/DBImpl.cpp
+++ b/cpp/src/db/DBImpl.cpp
@@ -228,7 +228,7 @@ Status DBImpl::merge_files(const std::string& group_id, const meta::DateT& date,
     for (auto& file : files) {
         auto to_merge = zilliz::vecwise::cache::CpuCacheMgr::GetInstance()->GetIndex(file.location);
         if (!to_merge) {
-            to_merge = read_index(file.location.c_str());
+            to_merge = read_index(file.location);
         }
         auto file_index = dynamic_cast<faiss::IndexIDMap*>(to_merge->data().get());
         index->add_with_ids(file_index->ntotal, dynamic_cast<faiss::IndexFlat*>(file_index->index)->xb.data(),