diff --git a/src/sql/resolver/ddl/ob_ddl_resolver.cpp b/src/sql/resolver/ddl/ob_ddl_resolver.cpp
index 34d71ffe86..490d762684 100644
--- a/src/sql/resolver/ddl/ob_ddl_resolver.cpp
+++ b/src/sql/resolver/ddl/ob_ddl_resolver.cpp
@@ -6807,6 +6807,18 @@ int ObDDLResolver::check_index_name_duplicate(const ObTableSchema &table_schema,
     }
   }
 
+  if (is_oracle_mode() && !has_same_index_name) {
+    //in oracle mode, names of index and primary key can't be same
+    ObTableSchema::const_constraint_iterator iter = table_schema.constraint_begin();
+    for (; !has_same_index_name && iter != table_schema.constraint_end(); ++iter) {
+      if (CONSTRAINT_TYPE_PRIMARY_KEY == (*iter)->get_constraint_type()) {
+        if (0 == create_index_arg.index_name_.compare((*iter)->get_constraint_name_str())) {
+          has_same_index_name = true;
+        }
+      }
+    }
+  }
+
   return ret;
 }
 
diff --git a/src/sql/resolver/dml/ob_delete_resolver.cpp b/src/sql/resolver/dml/ob_delete_resolver.cpp
index ec80fa8c2f..75fdc332fb 100644
--- a/src/sql/resolver/dml/ob_delete_resolver.cpp
+++ b/src/sql/resolver/dml/ob_delete_resolver.cpp
@@ -336,6 +336,9 @@ int ObDeleteResolver::find_delete_table_with_mysql_rule(const ObString &db_name,
   if (OB_SUCC(ret)) {
     if (table_items.count() == 1) {
       table_item = const_cast<TableItem*>(table_items.at(0));
+      if (!db_name.empty() && !table_item->alias_name_.empty()) {
+       table_item = NULL;
+      }
     } else if (db_name.empty()) {
       //如果table_items中有多个table_item，说明delete子句没有指定table的database_name
       //而from子句中所有表都是基表，例如delete t1.* from db1.t1, db2.t1;