diff --git a/src/sql/optimizer/ob_log_plan.cpp b/src/sql/optimizer/ob_log_plan.cpp
index fd8c2c446e..028b7b5ce1 100644
--- a/src/sql/optimizer/ob_log_plan.cpp
+++ b/src/sql/optimizer/ob_log_plan.cpp
@@ -13401,11 +13401,7 @@ int ObLogPlan::fill_join_filter_info(JoinFilterInfo &join_filter_info)
     ret = OB_ERR_UNEXPECTED;
     LOG_WARN("unexpected null", K(ret));
   } else {
-    join_filter_info.pushdown_filter_table_.qb_name_ = qb_name;
-    join_filter_info.pushdown_filter_table_.table_name_ = table_item->get_object_name();
-    if (table_item->is_basic_table()) {
-      join_filter_info.pushdown_filter_table_.db_name_ = table_item->database_name_;
-    }
+    join_filter_info.pushdown_filter_table_.set_table(*table_item);
   }
   return ret;
 }
diff --git a/src/sql/optimizer/ob_logical_operator.cpp b/src/sql/optimizer/ob_logical_operator.cpp
index 154ef9c0de..755d46a0d5 100644
--- a/src/sql/optimizer/ob_logical_operator.cpp
+++ b/src/sql/optimizer/ob_logical_operator.cpp
@@ -1402,23 +1402,13 @@ int ObLogicalOperator::print_used_hint(PlanText &plan_text)
 int ObLogicalOperator::print_outline_table(PlanText &plan_text, const TableItem *table_item) const
 {
   int ret = OB_SUCCESS;
-  char *buf = plan_text.buf_;
-  int64_t &buf_len = plan_text.buf_len_;
-  int64_t &pos = plan_text.pos_;
+  ObTableInHint table_hint;
   if (OB_ISNULL(table_item)) {
     ret = OB_ERR_UNEXPECTED;
     LOG_WARN("unexpected NULL", K(ret), K(table_item));
-  } else if (table_item->is_basic_table() && !table_item->database_name_.empty() &&
-             OB_FAIL(BUF_PRINTF("\"%.*s\".",
-                                table_item->database_name_.length(),
-                                table_item->database_name_.ptr()))) {
-    LOG_WARN("fail to print db name", K(ret), K(buf), K(buf_len), K(pos));
-  } else if (OB_FAIL(BUF_PRINTF("\"%.*s\"@\"%.*s\"",
-                                table_item->get_object_name().length(),
-                                table_item->get_object_name().ptr(),
-                                table_item->qb_name_.length(),
-                                table_item->qb_name_.ptr()))) {
-    LOG_WARN("fail to print buffer", K(ret), K(buf), K(buf_len), K(pos));
+  } else if (OB_FALSE_IT(table_hint.set_table(*table_item))) {
+  } else if (OB_FAIL(table_hint.print_table_in_hint(plan_text))) {
+    LOG_WARN("failed to print table hint", K(ret));
   }
   return ret;
 }
diff --git a/src/sql/resolver/dml/ob_dml_stmt.h b/src/sql/resolver/dml/ob_dml_stmt.h
index 51b2491e24..71a82785ef 100644
--- a/src/sql/resolver/dml/ob_dml_stmt.h
+++ b/src/sql/resolver/dml/ob_dml_stmt.h
@@ -364,7 +364,11 @@ struct TableItem
   const common::ObString &get_table_name() const { return alias_name_.empty() ? table_name_ : alias_name_; }
   const common::ObString &get_object_name() const
   {
-    return alias_name_.empty() ? (synonym_name_.empty() ? get_table_name() : synonym_name_) : alias_name_;
+    return alias_name_.empty() ? (synonym_name_.empty() ? table_name_ : synonym_name_) : alias_name_;
+  }
+  const common::ObString &get_object_db_name() const
+  {
+    return synonym_name_.empty() ? database_name_ : synonym_db_name_;
   }
   const TableItem &get_base_table_item() const
   {
diff --git a/src/sql/resolver/dml/ob_hint.cpp b/src/sql/resolver/dml/ob_hint.cpp
index 8f74c0d406..ccb43c9ae0 100644
--- a/src/sql/resolver/dml/ob_hint.cpp
+++ b/src/sql/resolver/dml/ob_hint.cpp
@@ -1226,8 +1226,7 @@ int ObHint::create_push_down_hint(ObIAllocator *allocator,
           ret = OB_ERR_UNEXPECTED;
           LOG_WARN("unexpected null", K(ret));
         } else if (all_tables.at(i)->is_match_table_item(cs_type, source_table)) {
-          all_tables.at(i)->db_name_ = target_table.database_name_;
-          all_tables.at(i)->table_name_ = target_table.get_object_name();
+          all_tables.at(i)->set_table(target_table);
         }
       }
       if (OB_SUCC(ret)) {
@@ -2716,7 +2715,7 @@ int ObTableInHint::print_table_in_hint(PlanText &plan_text,
 bool ObTableInHint::is_match_table_item(ObCollationType cs_type, const TableItem &table_item) const
 {
   return 0 == ObCharset::strcmp(cs_type, table_name_, table_item.get_object_name()) &&
-         (db_name_.empty() || 0 == ObCharset::strcmp(cs_type, db_name_, table_item.database_name_));
+         (db_name_.empty() || 0 == ObCharset::strcmp(cs_type, db_name_, table_item.get_object_db_name()));
 }
 
 bool ObTableInHint::is_match_physical_table_item(ObCollationType cs_type, const TableItem &table_item) const
@@ -2802,6 +2801,7 @@ bool ObTableInHint::is_match_table_items(ObCollationType cs_type,
 void ObTableInHint::set_table(const TableItem& table)
 {
   qb_name_.assign_ptr(table.qb_name_.ptr(), table.qb_name_.length());
+  db_name_.reset(); // for alias table or generated table, db_name_ should be empty
   if (!table.alias_name_.empty()) {
     table_name_.assign_ptr(table.alias_name_.ptr(), table.alias_name_.length());
   } else if (table.is_synonym()) {
diff --git a/src/sql/resolver/dml/ob_hint.h b/src/sql/resolver/dml/ob_hint.h
index 95df31ca8f..c4d2d47fc3 100644
--- a/src/sql/resolver/dml/ob_hint.h
+++ b/src/sql/resolver/dml/ob_hint.h
@@ -433,6 +433,8 @@ struct ObTableInHint
                 const common::ObString &table_name)
       : qb_name_(qb_name), db_name_(db_name), table_name_(table_name)
   { }
+  ObTableInHint(const TableItem& table)
+  { set_table(table); }
   int assign(const ObTableInHint &other);
   bool is_match_table_item(ObCollationType cs_type, const TableItem &table_item) const;
   bool is_match_physical_table_item(ObCollationType cs_type, const TableItem &table_item) const;
diff --git a/src/sql/resolver/dml/ob_sql_hint.cpp b/src/sql/resolver/dml/ob_sql_hint.cpp
index 367db77000..80d656bef9 100644
--- a/src/sql/resolver/dml/ob_sql_hint.cpp
+++ b/src/sql/resolver/dml/ob_sql_hint.cpp
@@ -960,9 +960,7 @@ int ObQueryHint::fill_tables(const TableItem &table, ObIArray<ObTableInHint> &hi
             || OB_FAIL(tables.push_back(join_table->right_table_))) {
           LOG_WARN("failed to push back", K(ret));
         }
-      } else if (OB_FAIL(hint_tables.push_back(ObTableInHint(cur_table->qb_name_,
-                                                             cur_table->database_name_,
-                                                             cur_table->get_object_name())))) {
+      } else if (OB_FAIL(hint_tables.push_back(ObTableInHint(*cur_table)))) {
         LOG_WARN("failed to push back", K(ret));
       }
     }
diff --git a/src/sql/rewrite/ob_transform_utils.cpp b/src/sql/rewrite/ob_transform_utils.cpp
index 0a8bd750b5..ec43afe39e 100644
--- a/src/sql/rewrite/ob_transform_utils.cpp
+++ b/src/sql/rewrite/ob_transform_utils.cpp
@@ -12762,8 +12762,7 @@ int ObTransformUtils::get_sorted_table_hint(ObSEArray<TableItem *, 4> &tables,
     if (OB_ISNULL(table)) {
       ret = OB_ERR_UNEXPECTED;
       LOG_WARN("get unexpected null", K(ret));
-    } else if (OB_FAIL(table_hints.push_back(
-               ObTableInHint(table->qb_name_, table->database_name_, table->get_object_name())))) {
+    } else if (OB_FAIL(table_hints.push_back(ObTableInHint(*table)))) {
       LOG_WARN("failed to push back hint table", K(ret));
     }
   }
diff --git a/src/sql/rewrite/ob_transform_win_magic.cpp b/src/sql/rewrite/ob_transform_win_magic.cpp
index 467e4e15a8..a471a20b8a 100644
--- a/src/sql/rewrite/ob_transform_win_magic.cpp
+++ b/src/sql/rewrite/ob_transform_win_magic.cpp
@@ -103,8 +103,7 @@ int ObTransformWinMagic::construct_transform_hint(ObDMLStmt &stmt, void *trans_p
         if (OB_ISNULL(table)) {
           ret = OB_ERR_UNEXPECTED;
           LOG_WARN("get unexpected null", K(ret));
-        } else if (OB_FAIL(hint->get_tb_name_list().push_back(ObTableInHint(table->qb_name_,
-                                              table->database_name_, table->get_object_name())))) {
+        } else if (OB_FAIL(hint->get_tb_name_list().push_back(ObTableInHint(*table)))) {
           LOG_WARN("failed to push back hint table", K(ret));
         }
       }