Update 达梦

Src/Asp.NetCore2/SqlSugar/Realization/Dm/DbMaintenance/DmDbMaintenance.cs

@@ -29,17 +29,16 @@ namespace SqlSugar
         {
             get
             {
-                return @"SELECT  
-                        table_name name,
-                        (select TOP 1 COMMENTS from user_tab_comments where t.table_name=table_name )  as Description
-                        from user_tables t where
-                        table_name!='HELP' 
-                        AND table_name NOT LIKE '%$%'
-                        AND table_name NOT LIKE 'LOGMNRC_%'
-                        AND table_name!='LOGMNRP_CTAS_PART_MAP'
-                        AND table_name!='LOGMNR_LOGMNR_BUILDLOG'
-                        AND table_name!='SQLPLUS_PRODUCT_PROFILE'  
-                         ";
+                return @"SELECT a.TABLE_NAME AS Name,b.COMMENTS AS Description
+FROM USER_TABLES a
+LEFT JOIN (SELECT DISTINCT TABLE_NAME,COMMENTS FROM USER_TAB_COMMENTS WHERE COMMENTS IS NOT NULL) b ON a.TABLE_NAME=b.TABLE_NAME
+WHERE 
+a.table_name!='HELP'
+AND a.table_name NOT LIKE '%$%'
+AND a.table_name NOT LIKE 'LOGMNRC_%'
+AND a.table_name!='LOGMNRP_CTAS_PART_MAP'
+AND a.table_name!='LOGMNR_LOGMNR_BUILDLOG'
+AND a.table_name!='SQLPLUS_PRODUCT_PROFILE'";
             }
         }
         protected override string GetViewInfoListSql