From ae696d051fdd183c27ca75f7aa13bde5649b7264 Mon Sep 17 00:00:00 2001
From: miyauchi <miyauchi@aptpod.co.jp>
Date: Fri, 20 Oct 2017 10:24:09 +0900
Subject: [PATCH 1/2] corresponds timestamp precision for mysql

---
 dialect_mysql.go | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/dialect_mysql.go b/dialect_mysql.go
index b9887a5c..573bfc0f 100644
--- a/dialect_mysql.go
+++ b/dialect_mysql.go
@@ -96,9 +96,9 @@ func (s *mysql) DataTypeOf(field *StructField) string {
 		case reflect.Struct:
 			if _, ok := dataValue.Interface().(time.Time); ok {
 				if _, ok := field.TagSettings["NOT NULL"]; ok {
-					sqlType = "timestamp"
+					sqlType = fmt.Sprintf("timestamp(%d)", size)
 				} else {
-					sqlType = "timestamp NULL"
+					sqlType = fmt.Sprintf("timestamp(%d) NULL", size)
 				}
 			}
 		default:

From 8d4e3e5a832d78a11ea13bb1166569095238cfd0 Mon Sep 17 00:00:00 2001
From: Jinzhu <wosmvp@gmail.com>
Date: Fri, 9 Feb 2018 23:18:47 +0800
Subject: [PATCH 2/2] Use tag PRECISION to set time's precision for mysql

---
 dialect_mysql.go | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/dialect_mysql.go b/dialect_mysql.go
index 573bfc0f..fee61819 100644
--- a/dialect_mysql.go
+++ b/dialect_mysql.go
@@ -95,10 +95,15 @@ func (s *mysql) DataTypeOf(field *StructField) string {
 			}
 		case reflect.Struct:
 			if _, ok := dataValue.Interface().(time.Time); ok {
+				precision := ""
+				if p, ok := field.TagSettings["PRECISION"]; ok {
+					precision = fmt.Sprintf("(%s)", p)
+				}
+
 				if _, ok := field.TagSettings["NOT NULL"]; ok {
-					sqlType = fmt.Sprintf("timestamp(%d)", size)
+					sqlType = fmt.Sprintf("timestamp%v", precision)
 				} else {
-					sqlType = fmt.Sprintf("timestamp(%d) NULL", size)
+					sqlType = fmt.Sprintf("timestamp%v NULL", precision)
 				}
 			}
 		default: