[FEAT MERGE]implement user-defined rewrite rules

src/sql/udr/ob_udr_sql_service.h

@@ -0,0 +1,72 @@
+// Copyright 2015-2016 Alibaba Inc. All Rights Reserved.
+// Author:
+//     LuoFan luofan.zp@alibaba-inc.com
+// Normalizer:
+//     LuoFan luofan.zp@alibaba-inc.com
+
+#ifndef OB_SQL_UDR_OB_UDR_SQL_SERVICE_H_
+#define OB_SQL_UDR_OB_UDR_SQL_SERVICE_H_
+#include "lib/mysqlclient/ob_mysql_result.h"
+#include "sql/udr/ob_udr_struct.h"
+
+namespace oceanbase
+{
+namespace common
+{
+class ObMySQLProxy;
+}
+namespace share
+{
+class ObDMLSqlSplicer;
+}
+
+namespace sql
+{
+
+class ObUDRSqlService
+{
+public:
+  ObUDRSqlService()
+  : inited_(false),
+    sql_proxy_(nullptr)
+  {}
+  ~ObUDRSqlService() {}
+  int init(ObMySQLProxy *proxy);
+  int insert_rule(ObUDRInfo &arg);
+  int remove_rule(ObUDRInfo &arg);
+  int alter_rule_status(ObUDRInfo &arg);
+  int fetch_max_rule_version(const uint64_t tenant_id,
+                             int64_t &max_rule_version);
+  int get_need_sync_rule_infos(ObIAllocator& allocator,
+                               const uint64_t tenant_id,
+                               const int64_t local_rule_version,
+                               ObIArray<ObUDRInfo>& rule_infos);
+  int clean_up_items_marked_for_deletion(const uint64_t tenant_id);
+
+private:
+  int fetch_new_rule_id(const uint64_t tenant_id,
+                        int64_t &new_rule_id);
+  int fetch_new_rule_version(const uint64_t tenant_id,
+                             int64_t &new_rule_version);
+  int gen_insert_rule_dml(const ObUDRInfo &arg,
+                          const uint64_t tenant_id,
+                          oceanbase::share::ObDMLSqlSplicer &dml);
+  int gen_modify_rule_status_dml(const ObUDRInfo &arg,
+                                 const uint64_t tenant_id,
+                                 oceanbase::share::ObDMLSqlSplicer &dml);
+  int gen_recyclebin_rule_name(const int64_t rule_version,
+                               const int64_t buf_len,
+                               char *buf,
+                               ObString &recyclebin_rule_name);
+
+private:
+  // Trigger delete DATE interval threshold
+  static const int64_t DELETE_DATE_INTERVAL_THRESHOLD = 2;
+  bool inited_;
+  ObMySQLProxy* sql_proxy_;
+};
+
+} // namespace sql end
+} // namespace oceanbase end
+
+#endif