From c362b7896c56c80347f5d322ed9f49e3a3f9b7ca Mon Sep 17 00:00:00 2001
From: sunkaixuan <610262374@qq.com>
Date: Sun, 28 Aug 2022 14:06:54 +0800
Subject: [PATCH] Updte exp to sql

---
 Src/Asp.Net/SqlSugar/ExpressionsToSql/ExpressionContext.cs    | 1 +
 .../SqlSugar/ExpressionsToSql/Subquery/Items/SubTop.cs        | 4 ++--
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/Src/Asp.Net/SqlSugar/ExpressionsToSql/ExpressionContext.cs b/Src/Asp.Net/SqlSugar/ExpressionsToSql/ExpressionContext.cs
index b9d72b446..b80c30198 100644
--- a/Src/Asp.Net/SqlSugar/ExpressionsToSql/ExpressionContext.cs
+++ b/Src/Asp.Net/SqlSugar/ExpressionsToSql/ExpressionContext.cs
@@ -158,6 +158,7 @@ namespace SqlSugar
         #endregion
 
         #region Override methods
+        public virtual string GetLimit() { return null; }
         public virtual string GetTranslationTableName(string entityName, bool isMapping = true)
         {
             Check.ArgumentNullException(entityName, string.Format(ErrorMessage.ObjNotExist, "Table Name"));
diff --git a/Src/Asp.Net/SqlSugar/ExpressionsToSql/Subquery/Items/SubTop.cs b/Src/Asp.Net/SqlSugar/ExpressionsToSql/Subquery/Items/SubTop.cs
index 5bd0d5961..8025ea004 100644
--- a/Src/Asp.Net/SqlSugar/ExpressionsToSql/Subquery/Items/SubTop.cs
+++ b/Src/Asp.Net/SqlSugar/ExpressionsToSql/Subquery/Items/SubTop.cs
@@ -61,9 +61,9 @@ namespace SqlSugar
             {
                 return (HasWhere?"AND":"WHERE")+ " ROWNUM=1";
             }
-            else if (this.Context is PostgreSQLExpressionContext)
+            else if (this.Context.GetLimit()!=null)
             {
-                return "limit 1";
+                return this.Context.GetLimit();
             }
             else
             {