diff --git a/Src/Asp.Net/PgSqlTest/Demo/Demo6_Queue.cs b/Src/Asp.Net/PgSqlTest/Demo/Demo6_Queue.cs
index 829ccf7d7..6748569f3 100644
--- a/Src/Asp.Net/PgSqlTest/Demo/Demo6_Queue.cs
+++ b/Src/Asp.Net/PgSqlTest/Demo/Demo6_Queue.cs
@@ -43,7 +43,7 @@ namespace OrmTest
 
             db.Queryable<Order>().AddQueue();
             db.Queryable<Order>().AddQueue();
-            db.AddQueue("select * from [Order] where id=@id", new { id = 10000 });
+            db.AddQueue("select * from \"order\" where id=@id", new { id = 10000 });
             var result2 = db.SaveQueues<Order, Order, Order>();
 
             Console.WriteLine("#### Queue End ####");
diff --git a/Src/Asp.Net/PgSqlTest/UnitTest/UAdo.cs b/Src/Asp.Net/PgSqlTest/UnitTest/UAdo.cs
index 5f3a431cb..5ce737a52 100644
--- a/Src/Asp.Net/PgSqlTest/UnitTest/UAdo.cs
+++ b/Src/Asp.Net/PgSqlTest/UnitTest/UAdo.cs
@@ -48,9 +48,9 @@ namespace OrmTest
             task8.Wait();
             UValidate.Check(8, task8.Result[0].id, "ado");
 
-            var task9=Db.Ado.SqlQuery<Order, OrderItem>("select * from [order];select * from OrderDetail");
+            var task9=Db.Ado.SqlQuery<Order, OrderItem>("select * from \"order\";select * from OrderDetail");
 
-            var task10 = Db.Ado.SqlQueryAsync<Order, OrderItem>("select * from [order];select * from OrderDetail");
+            var task10 = Db.Ado.SqlQueryAsync<Order, OrderItem>("select * from \"order\";select * from OrderDetail");
             task10.Wait();
         }
     }
diff --git a/Src/Asp.Net/PgSqlTest/UnitTest/UCodeFirst.cs b/Src/Asp.Net/PgSqlTest/UnitTest/UCodeFirst.cs
index 3c853a7d5..ab92b7f92 100644
--- a/Src/Asp.Net/PgSqlTest/UnitTest/UCodeFirst.cs
+++ b/Src/Asp.Net/PgSqlTest/UnitTest/UCodeFirst.cs
@@ -18,7 +18,7 @@ namespace OrmTest
         {
             [SqlSugar.SugarColumn(IndexGroupNameList = new string[] { "group1" })]
             public int Id { get; set; }
-            [SqlSugar.SugarColumn(DefaultValue="getdate()", IndexGroupNameList =new string[] {"group1" } )]
+            [SqlSugar.SugarColumn(DefaultValue="now()", IndexGroupNameList =new string[] {"group1" } )]
             public DateTime? CreateDate { get; set; }
         }
     }
diff --git a/Src/Asp.Net/PgSqlTest/UnitTest/UJson.cs b/Src/Asp.Net/PgSqlTest/UnitTest/UJson.cs
index 8b8f664a0..daf55b4b7 100644
--- a/Src/Asp.Net/PgSqlTest/UnitTest/UJson.cs
+++ b/Src/Asp.Net/PgSqlTest/UnitTest/UJson.cs
@@ -16,7 +16,7 @@ namespace OrmTest
             Db.Insertable(new JsonTest() { Order = new Order { Id = 1, Name = "order1" } }).ExecuteCommand();
             var list = Db.Queryable<JsonTest>().ToList();
             UValidate.Check("order1", list.First().Order.Name, "Json");
-            Db.Updateable(new JsonTest() { Id = 1, Order = new Order { Id = 2, Name = "order2" } }).ExecuteCommand();
+            var x=Db.Updateable(new JsonTest() { Id = Db.Queryable<JsonTest>().Max(it => it.Id), Order = new Order { Id = Db.Queryable<JsonTest>().Max(it=>it.Id), Name = "order2" } }).ExecuteCommand();
             list= Db.Queryable<JsonTest>().ToList();
             UValidate.Check("order2", list.First().Order.Name, "Json");
             var list2 = Db.Queryable<JsonTest>().ToList();
@@ -28,7 +28,7 @@ namespace OrmTest
     {
         [SqlSugar.SugarColumn(IsPrimaryKey = true, IsIdentity = true)]
         public int Id { get; set; }
-        [SqlSugar.SugarColumn(ColumnDataType = "varchar(max)", IsJson = true)]
+        [SqlSugar.SugarColumn(ColumnDataType = "varchar(4000)", IsJson = true)]
         public Order Order { get; set; }
     }
 }
diff --git a/Src/Asp.Net/SqlSugar/Realization/PostgreSQL/DbMaintenance/PostgreSQLDbMaintenance.cs b/Src/Asp.Net/SqlSugar/Realization/PostgreSQL/DbMaintenance/PostgreSQLDbMaintenance.cs
index 60b861050..42a9c244c 100644
--- a/Src/Asp.Net/SqlSugar/Realization/PostgreSQL/DbMaintenance/PostgreSQLDbMaintenance.cs
+++ b/Src/Asp.Net/SqlSugar/Realization/PostgreSQL/DbMaintenance/PostgreSQLDbMaintenance.cs
@@ -220,21 +220,21 @@ namespace SqlSugar
         {
             get
             {
-                return "";
+                return "CREATE INDEX Index_{0}_{2} ON {0} ({1})";
             }
         }
         protected override string AddDefaultValueSql
         {
             get
             {
-                return "";
+                return "ALTER TABLE {0} ALTER COLUMN {1} SET DEFAULT {2}";
             }
         }
         protected override string IsAnyIndexSql
         {
             get
             {
-                return "select count(*) from sys.indexes where name='{0}'";
+                return " SELECT count(1) FROM pg_class c JOIN   pg_namespace n ON n.oid = c.relnamespace where relname = '{0}'";
             }
         }
         #endregion