wait user ls end scn when switchover

src/share/ob_share_util.h

@@ -21,6 +21,10 @@ namespace common
 class ObTimeoutCtx;
 class ObISQLClient;
 }
+namespace storage
+{
+  class ObLS;
+}
 namespace share
 {
 class ObShareUtil
@@ -77,6 +81,10 @@ public:
     const uint64_t tenant_id,
     const ObSqlString &sql,
     SCN &ora_rowscn);
+  // wait the given ls's end_scn be larger than or equal to sys_ls_target_scn
+  // @params[in]: sys_ls_target_scn
+  // @params[in]: ls
+  static int wait_user_ls_sync_scn_locally(const share::SCN &sys_ls_target_scn, storage::ObLS &ls);
 
   static bool is_tenant_enable_rebalance(const uint64_t tenant_id);
 };