From d47e773badb69bc616a8d7987e1dfd9d4ee3d0c3 Mon Sep 17 00:00:00 2001
From: Ewan Chou <coocood@gmail.com>
Date: Tue, 29 Dec 2015 10:23:54 +0800
Subject: [PATCH] util/types: remove optimisation not related to this PR.

---
 util/types/convert.go | 10 ----------
 1 file changed, 10 deletions(-)

diff --git a/util/types/convert.go b/util/types/convert.go
index 2954e048ee..55ebd67486 100644
--- a/util/types/convert.go
+++ b/util/types/convert.go
@@ -559,16 +559,6 @@ func ToUint64(value interface{}) (uint64, error) {
 
 // ToInt64 converts an interface to an int64.
 func ToInt64(value interface{}) (int64, error) {
-	switch x := value.(type) {
-	case int64:
-		return x, nil
-	case int:
-		return int64(x), nil
-	case uint64:
-		if int64(x) > 0 {
-			return int64(x), nil
-		}
-	}
 	return convertToInt(value, NewFieldType(mysql.TypeLonglong))
 }