diff --git a/FreeSql.DbContext/FreeSql.DbContext.xml b/FreeSql.DbContext/FreeSql.DbContext.xml
index 0e0d5e87..9cd1afb5 100644
--- a/FreeSql.DbContext/FreeSql.DbContext.xml
+++ b/FreeSql.DbContext/FreeSql.DbContext.xml
@@ -517,5 +517,14 @@
             <param name="that"></param>
             <returns></returns>
         </member>
+        <member name="M:Microsoft.Extensions.DependencyInjection.FreeSqlRepositoryDependencyInjection.AddFreeRepository(Microsoft.Extensions.DependencyInjection.IServiceCollection,System.Action{FreeSql.FluentDataFilter},System.Reflection.Assembly[])">
+            <summary>
+            批量注入 Repository，可以参考代码自行调整
+            </summary>
+            <param name="services"></param>
+            <param name="globalDataFilter"></param>
+            <param name="assemblies"></param>
+            <returns></returns>
+        </member>
     </members>
 </doc>
diff --git a/FreeSql/Internal/CommonExpression.cs b/FreeSql/Internal/CommonExpression.cs
index c5da12e1..d2092d9d 100644
--- a/FreeSql/Internal/CommonExpression.cs
+++ b/FreeSql/Internal/CommonExpression.cs
@@ -1004,6 +1004,18 @@ namespace FreeSql.Internal
                                         var fsqlSelect0 = fsql as Select0Provider;
                                         switch (exp3.Method.Name) {
                                             case "Any": //exists
+                                                switch (_ado.DataType)
+                                                {
+                                                    case DataType.Oracle:
+                                                    case DataType.OdbcOracle:
+                                                    case DataType.Dameng:
+                                                    case DataType.OdbcDameng:
+                                                        break;
+                                                    default:
+                                                        fsqlSelect0._limit = 1; //#462 ORACLE rownum <= 2 会影响索引变慢
+                                                        break;
+                                                }
+                                                break;
                                             case "ToOne":
                                             case "First":
                                                 fsqlSelect0._limit = 1; //#462