diff --git a/src/pl/pl_cache/ob_pl_cache_mgr.cpp b/src/pl/pl_cache/ob_pl_cache_mgr.cpp
index a61a26672b..4bde114b1a 100644
--- a/src/pl/pl_cache/ob_pl_cache_mgr.cpp
+++ b/src/pl/pl_cache/ob_pl_cache_mgr.cpp
@@ -188,7 +188,7 @@ int ObPLCacheMgr::add_pl_cache(ObPlanCache *lib_cache, ObILibCacheObject *pl_obj
 int ObPLCacheMgr::cache_evict_all_pl(ObPlanCache *lib_cache)
 {
   int ret = OB_SUCCESS;
-  PL_CACHE_LOG(DEBUG, "cache evict all pl cache start");
+  PL_CACHE_LOG(TRACE, "cache evict all pl cache start");
   if (OB_ISNULL(lib_cache)) {
     ret = OB_ERR_UNEXPECTED;
     LOG_WARN("lib cache is null");
@@ -198,7 +198,7 @@ int ObPLCacheMgr::cache_evict_all_pl(ObPlanCache *lib_cache)
     if (OB_FAIL(lib_cache->foreach_cache_evict(get_ids_op))) {
       PL_CACHE_LOG(WARN, "failed to foreach cache evict", K(ret));
     }
-    PL_CACHE_LOG(DEBUG, "cache evict all pl end", K(to_evict_keys));
+    PL_CACHE_LOG(TRACE, "cache evict all pl end");
   }
 
   return ret;
diff --git a/src/sql/engine/expr/ob_expr_subquery_ref.h b/src/sql/engine/expr/ob_expr_subquery_ref.h
index 5fa599ed41..e06fed8b55 100644
--- a/src/sql/engine/expr/ob_expr_subquery_ref.h
+++ b/src/sql/engine/expr/ob_expr_subquery_ref.h
@@ -68,7 +68,7 @@ public:
   public:
     ExtraInfo(common::ObIAllocator &alloc, ObExprOperatorType type)
       : ObIExprExtraInfo(alloc, type),
-        is_cursor_(false), row_desc_(alloc) {}
+        is_cursor_(false), scalar_result_type_(alloc), row_desc_(alloc) {}
     virtual ~ExtraInfo() { row_desc_.destroy(); }
     void reset();
     int assign(const ExtraInfo &other);
diff --git a/src/sql/ob_sql.cpp b/src/sql/ob_sql.cpp
index 50b11320a8..5c274a572a 100644
--- a/src/sql/ob_sql.cpp
+++ b/src/sql/ob_sql.cpp
@@ -1063,7 +1063,7 @@ int ObSql::do_real_prepare(const ObString &sql,
               && !(ObStmt::is_dml_write_stmt(stmt_type) && // returning into from oci not supported
                    static_cast<ObDelUpdStmt*>(basic_stmt)->get_returning_into_exprs().count() > 0)
               && enable_udr
-              && OB_FAIL(ObUDRUtils::match_udr_item(sql, session, allocator, item_guard))) {
+              && OB_FAIL(ObUDRUtils::match_udr_item(sql, session, ectx, allocator, item_guard))) {
       if (!ObSQLUtils::check_need_disconnect_parser_err(ret)) {
         ectx.set_need_disconnect(false);
       }
@@ -1083,7 +1083,7 @@ int ObSql::do_real_prepare(const ObString &sql,
                                                                   param_store,
                                                                   session.get_local_collation_connection()))) {
         LOG_WARN("parameterize syntax tree failed", K(ret));
-        if (OB_INVALID_ARGUMENT == ret) {
+        if (OB_INVALID_ARGUMENT == ret || OB_NOT_SUPPORTED == ret) {
           pc_ctx.ps_need_parameterized_ = false;
           ret = OB_SUCCESS;
         }
diff --git a/src/sql/udr/ob_udr_utils.cpp b/src/sql/udr/ob_udr_utils.cpp
index 779475574b..aa276ede17 100644
--- a/src/sql/udr/ob_udr_utils.cpp
+++ b/src/sql/udr/ob_udr_utils.cpp
@@ -21,6 +21,7 @@ namespace sql
 
 int ObUDRUtils::match_udr_item(const ObString &pattern,
                                const ObSQLSessionInfo &session_info,
+                               ObExecContext &ectx,
                                ObIAllocator &allocator,
                                ObUDRItemMgr::UDRItemRefGuard &guard,
                                PatternConstConsList *cst_cons_list)
@@ -50,6 +51,9 @@ int ObUDRUtils::match_udr_item(const ObString &pattern,
       LOG_TRACE("succ to match rewrite rule item", KPC(guard.get_ref_obj()));
     }
   }
+  if (OB_FAIL(ret) && !ObSQLUtils::check_need_disconnect_parser_err(ret)) {
+    ectx.set_need_disconnect(false);
+  }
   return ret;
 }
 
@@ -251,7 +255,7 @@ int ObUDRUtils::match_udr_and_refill_ctx(const ObString &pattern,
   if (enable_udr && !(pc_ctx.is_inner_sql() || PC_PL_MODE == pc_ctx.mode_)) {
     ObIAllocator &allocator = result.get_mem_pool();
     PatternConstConsList cst_cons_list;
-    if (OB_FAIL(match_udr_item(pattern, session, allocator, item_guard, &cst_cons_list))) {
+    if (OB_FAIL(match_udr_item(pattern, session, ectx, allocator, item_guard, &cst_cons_list))) {
       LOG_WARN("failed to match user defined rewrite rule", K(ret));
     } else if (!cst_cons_list.empty()
       && OB_FAIL(cons_udr_const_cons_list(cst_cons_list, pc_ctx))) {
@@ -268,10 +272,6 @@ int ObUDRUtils::match_udr_and_refill_ctx(const ObString &pattern,
       is_match_udr = true;
       LOG_TRACE("succ to match user-defined rule", K(ret));
     }
-    if (OB_SUCCESS != ret
-      && !ObSQLUtils::check_need_disconnect_parser_err(ret)) {
-      ectx.set_need_disconnect(false);
-    }
   }
   return ret;
 }
diff --git a/src/sql/udr/ob_udr_utils.h b/src/sql/udr/ob_udr_utils.h
index f7dd3ceb79..d22036d972 100644
--- a/src/sql/udr/ob_udr_utils.h
+++ b/src/sql/udr/ob_udr_utils.h
@@ -29,6 +29,7 @@ public:
                                       ObUDRItemMgr::UDRItemRefGuard &item_guard);
   static int match_udr_item(const ObString &pattern,
                             const ObSQLSessionInfo &session_info,
+                            ObExecContext &ectx,
                             ObIAllocator &allocator,
                             ObUDRItemMgr::UDRItemRefGuard &guard,
                             PatternConstConsList *cst_cons_list = nullptr);