online ddl tablet on demand.
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		@ -228,13 +228,19 @@ int ObLSDDLLogHandler::online()
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    } else {
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					    } else {
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      while (OB_SUCC(ret)) {
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					      while (OB_SUCC(ret)) {
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        ObTabletHandle tablet_handle;
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					        ObTabletHandle tablet_handle;
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        if (OB_FAIL(tablet_iter.get_next_tablet(tablet_handle))) {
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					        ObDDLKvMgrHandle ddl_kv_mgr_handle;
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					        if (OB_FAIL(tablet_iter.get_next_ddl_kv_mgr(ddl_kv_mgr_handle))) {
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          if (OB_ITER_END == ret) {
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					          if (OB_ITER_END == ret) {
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            ret = OB_SUCCESS;
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					            ret = OB_SUCCESS;
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            break;
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					            break;
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          } else {
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					          } else {
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            LOG_WARN("get next tablet failed", K(ret));
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					            LOG_WARN("failed to get next ddl kv mgr", K(ret));
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          }
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					          }
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					        } else if (OB_UNLIKELY(!ddl_kv_mgr_handle.is_valid())) {
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					          ret = OB_ERR_UNEXPECTED;
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					          LOG_WARN("invalid tablet handle", K(ret), K(ddl_kv_mgr_handle));
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					        } else if (OB_FAIL(ls_->get_tablet(ddl_kv_mgr_handle.get_obj()->get_tablet_id(), tablet_handle))) {
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					          LOG_WARN("get tablet handle failed", K(ret), KPC(ddl_kv_mgr_handle.get_obj()));
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        } else if (OB_FAIL(tablet_handle.get_obj()->start_direct_load_task_if_need())) {
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					        } else if (OB_FAIL(tablet_handle.get_obj()->start_direct_load_task_if_need())) {
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          LOG_WARN("start ddl if need failed", K(ret));
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					          LOG_WARN("start ddl if need failed", K(ret));
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        }
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					        }
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