From a7ddaff4707e9cd5a8e30789b51a6187f87baeaa Mon Sep 17 00:00:00 2001
From: 2881099 <2881099@qq.com>
Date: Thu, 24 Oct 2024 14:22:03 +0800
Subject: [PATCH] =?UTF-8?q?-=20=E4=BC=98=E5=8C=96=20UnionAll=20=E4=B8=BA?=
 =?UTF-8?q?=20null=20=E7=9A=84=20query=EF=BC=9B?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../Internal/CommonProvider/SelectProvider/Select1Provider.cs   | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/FreeSql/Internal/CommonProvider/SelectProvider/Select1Provider.cs b/FreeSql/Internal/CommonProvider/SelectProvider/Select1Provider.cs
index 99fd0dc27..a06685c5d 100644
--- a/FreeSql/Internal/CommonProvider/SelectProvider/Select1Provider.cs
+++ b/FreeSql/Internal/CommonProvider/SelectProvider/Select1Provider.cs
@@ -213,6 +213,8 @@ public ISelect<T1, T2, T3, T4, T5> FromQuery<T2, T3, T4, T5>(ISelect<T2> select2
         
         public ISelect<T1> UnionAll(params ISelect<T1>[] querys)
         {
+            querys = querys?.Where(q => q != null).ToArray();
+            if (querys?.Any() != true) return this;
             var ret = (_orm as BaseDbProvider).CreateSelectProvider<T1>(null) as Select1Provider<T1>;
             var sb = new StringBuilder().Append(LocalGetQuerySql(this));
             foreach (var select2 in querys)