From a7a562c483c8e9c261583828e2fd57c934cee015 Mon Sep 17 00:00:00 2001
From: Lunny Xiao <xiaolunwen@gmail.com>
Date: Thu, 14 Dec 2023 19:47:16 +0800
Subject: [PATCH] Fix bug

---
 internal/statements/index.go | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/internal/statements/index.go b/internal/statements/index.go
index 23d0130e..a2126cbb 100644
--- a/internal/statements/index.go
+++ b/internal/statements/index.go
@@ -8,6 +8,7 @@ import (
 	"strings"
 
 	"xorm.io/builder"
+	"xorm.io/xorm/schemas"
 )
 
 type ErrInvalidIndexHintOperator struct {
@@ -28,8 +29,12 @@ func (statement *Statement) IndexHint(op, indexName string) error {
 }
 
 func (statement *Statement) writeIndexHints(w *builder.BytesWriter) error {
+	if len(statement.indexHints) == 0 {
+		return nil
+	}
+
 	switch statement.dialect.URI().DBType {
-	case "mysql":
+	case schemas.MYSQL:
 		return statement.writeIndexHintsMySQL(w)
 	default:
 		return ErrNotImplemented