diff --git a/database/gdb/gdb_func.go b/database/gdb/gdb_func.go
index fab36478e..a75b61525 100644
--- a/database/gdb/gdb_func.go
+++ b/database/gdb/gdb_func.go
@@ -357,14 +357,15 @@ func doQuoteWord(s, charLeft, charRight string) string {
 	return s
 }
 
-// doQuoteString quotes string with quote chars. It handles strings like:
-// "user",
-// "user u",
-// "user,user_detail",
-// "user u, user_detail ut",
-// "user.user u, user.user_detail ut",
-// "u.id, u.name, u.age",
-// "u.id asc".
+// doQuoteString quotes string with quote chars.
+// For example, if quote char is '`':
+// "user"                             => "`user`"
+// "user u"                           => "`user` u"
+// "user,user_detail"                 => "`user`,`user_detail`"
+// "user u, user_detail ut"           => "`user` u,`user_detail` ut"
+// "user.user u, user.user_detail ut" => "`user`.`user` u,`user`.`user_detail` ut"
+// "u.id, u.name, u.age"              => "`u`.`id`,`u`.`name`,`u`.`age`"
+// "u.id asc"                         => "`u`.`id` asc"
 func doQuoteString(s, charLeft, charRight string) string {
 	array1 := gstr.SplitAndTrim(s, ",")
 	for k1, v1 := range array1 {
diff --git a/version.go b/version.go
index bd9e356f1..882ec7b9e 100644
--- a/version.go
+++ b/version.go
@@ -1,4 +1,4 @@
 package gf
 
-const VERSION = "v1.16.4"
+const VERSION = "v1.16.5"
 const AUTHORS = "john<john@goframe.org>"