From 9ea0b58c7e3680f535d4bc01fbcdce763d4efd2c Mon Sep 17 00:00:00 2001
From: shenli <shenli3514@gmail.com>
Date: Thu, 22 Oct 2015 14:13:33 +0800
Subject: [PATCH] expression: Fix bug found in sqllogictest-aggregates

---
 expression/in.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/expression/in.go b/expression/in.go
index f958dbba54..1523aa348b 100644
--- a/expression/in.go
+++ b/expression/in.go
@@ -137,7 +137,7 @@ func (n *PatternIn) Eval(ctx context.Context, args map[interface{}]interface{})
 		return nil, err
 	}
 
-	if lhs == nil {
+	if types.IsNil(lhs) {
 		return nil, nil
 	}