diff --git a/FreeSql.Tests/FreeSql.Tests/Issues/592.cs b/FreeSql.Tests/FreeSql.Tests/Issues/592.cs
index 97da64b5..3c3b7c7d 100644
--- a/FreeSql.Tests/FreeSql.Tests/Issues/592.cs
+++ b/FreeSql.Tests/FreeSql.Tests/Issues/592.cs
@@ -17,7 +17,10 @@ namespace FreeSql.Tests.Issues
 		[Fact]
 		public void AdoNet()
 		{
-            using (var conn = g.mysql.Ado.MasterPool.Get())
+            var fsql = g.mysql;
+            fsql.Select<park_sys_users, park_sys_userrole>();
+
+            using (var conn = fsql.Ado.MasterPool.Get())
             {
                 var list = conn.Value.Select<park_sys_users, park_sys_userrole>()
                     .LeftJoin((rs, le) => rs.user_id == le.ur_userid)
diff --git a/FreeSql.Tests/FreeSql.Tests/Issues/594.cs b/FreeSql.Tests/FreeSql.Tests/Issues/594.cs
new file mode 100644
index 00000000..bac35b66
--- /dev/null
+++ b/FreeSql.Tests/FreeSql.Tests/Issues/594.cs
@@ -0,0 +1,50 @@
+using FreeSql.DataAnnotations;
+using Newtonsoft.Json;
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.ComponentModel.DataAnnotations;
+using System.Diagnostics;
+using System.Reflection;
+using System.Text;
+using System.Threading;
+using Xunit;
+
+namespace FreeSql.Tests.Issues
+{
+	public class _594
+	{
+		[Fact]
+		public void Decimal()
+		{
+            var fsql = g.sqlserver;
+
+            fsql.Delete<ts_decimal_18_4>().Where("1=1").ExecuteAffrows();
+            var id = Guid.NewGuid();
+
+            Assert.Equal(1, fsql.Insert(new ts_decimal_18_4 { id = id }).ExecuteAffrows());
+            Assert.Equal(1, fsql.Update<ts_decimal_18_4>(id)
+                .Set(a => a.price, 698830024.6700m)
+                .ExecuteAffrows());
+
+            Assert.Equal(1, fsql.Update<ts_decimal_18_4>()
+                .SetSource(new ts_decimal_18_4 { id = id, price = 698830024.6700m })
+                .ExecuteAffrows());
+
+            Assert.Equal(1, fsql.Update<ts_decimal_18_4>(id).NoneParameter()
+                .Set(a => a.price, 698830024.6700m)
+                .ExecuteAffrows());
+
+            Assert.Equal(1, fsql.Update<ts_decimal_18_4>().NoneParameter()
+                .SetSource(new ts_decimal_18_4 { id = id, price = 698830024.6700m })
+                .ExecuteAffrows());
+        }
+
+        class ts_decimal_18_4
+        {
+            public Guid id { get; set; }
+            [Column(Precision = 18, Scale = 4)]
+            public decimal price { get; set; }
+        }
+    }
+}