diff --git a/src/sql/resolver/expr/ob_raw_expr.cpp b/src/sql/resolver/expr/ob_raw_expr.cpp
index a1e9878e04..4a7f842c74 100644
--- a/src/sql/resolver/expr/ob_raw_expr.cpp
+++ b/src/sql/resolver/expr/ob_raw_expr.cpp
@@ -1594,6 +1594,8 @@ int ObColumnRefRawExpr::assign(const ObRawExpr &other)
       column_id_ = tmp.column_id_;
       database_name_ = tmp.database_name_;
       table_name_ = tmp.table_name_;
+      synonym_name_ = tmp.synonym_name_;
+      synonym_db_name_ = tmp.synonym_db_name_;
       column_name_ = tmp.column_name_;
       column_flags_ = tmp.column_flags_;
       dependant_expr_ = tmp.dependant_expr_;
diff --git a/src/sql/resolver/expr/ob_raw_expr_printer.cpp b/src/sql/resolver/expr/ob_raw_expr_printer.cpp
index d9e8e285eb..bcb2e94c28 100644
--- a/src/sql/resolver/expr/ob_raw_expr_printer.cpp
+++ b/src/sql/resolver/expr/ob_raw_expr_printer.cpp
@@ -2982,12 +2982,12 @@ int ObRawExprPrinter::print(ObSysFunRawExpr *expr)
           LOG_WARN("unexpected param type of expr", K(ret), KPC(expr));
         } else {
           sub_pk_expr = static_cast<ObColumnRefRawExpr*>(expr->get_param_expr(1));
-          ObString table_name = sub_pk_expr->get_table_name();
-          if (!table_name.empty()) {
-            PRINT_IDENT_WITH_QUOT(table_name);
-            DATA_PRINTF(".");
-            PRINT_IDENT_WITH_QUOT(ObString(OB_HIDDEN_LOGICAL_ROWID_COLUMN_NAME));
-          }
+          // Mock a rowid ColumnRefExpr temporarily
+          ObColumnRefRawExpr tmp_rowid_expr;
+          tmp_rowid_expr.set_expr_type(sub_pk_expr->get_expr_type());
+          tmp_rowid_expr.assign(*sub_pk_expr);
+          tmp_rowid_expr.set_column_name(ObString(OB_HIDDEN_LOGICAL_ROWID_COLUMN_NAME));
+          PRINT_EXPR(&tmp_rowid_expr);
         }
         break;
       }