From 43c272fd134cf8fe7bba512ac3317fd511d4cc16 Mon Sep 17 00:00:00 2001
From: "shengjun.li" <shengjun.li@zilliz.com>
Date: Wed, 12 Aug 2020 19:11:13 +0800
Subject: [PATCH] fix annoy l2 (#3232)

Signed-off-by: shengjun.li <shengjun.li@zilliz.com>
---
 core/src/index/thirdparty/annoy/src/annoylib.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/core/src/index/thirdparty/annoy/src/annoylib.h b/core/src/index/thirdparty/annoy/src/annoylib.h
index 605137a8ed..91c11e513b 100644
--- a/core/src/index/thirdparty/annoy/src/annoylib.h
+++ b/core/src/index/thirdparty/annoy/src/annoylib.h
@@ -783,7 +783,7 @@ struct Euclidean : Minkowski {
   }
   template<typename T>
   static inline T normalized_distance(T distance) {
-    return sqrt(std::max(distance, T(0)));
+    return distance;
   }
   template<typename S, typename T>
   static inline void init_node(Node<S, T>* n, int f) {