declare  l_str varchar2(8);begin    for x in (select distinct partition_name from user_tab_partitions where table_name='T_DW_XA_GLOG_SHOPTRADE' and partition_name like  'SYS%')loop      execute immediate              'select distinct to_char(logtime,''yyyymmdd'') from t_dw_xa_glog_shoptrade partition('||x.partition_name||')' into l_str;      execute immediate         'alter table t_dw_xa_glog_shoptrade rename partition "'||x.partition_name ||'" to "'||'P'||l_str||'"';      end loop;    end;