批量修改表分區的名稱(Oracle)____Oracle

--批量修改表分區的名稱
DECLARE
  V_SQL VARCHAR2(1000);
BEGIN
  FOR X IN (SELECT TABLE_NAME, PARTITION_NAME
                       FROM USER_TAB_PARTITIONS
                      WHERE TO_DATE(SUBSTR(REPLACE(PARTITION_NAME,'_',''), -6), 'YY-MM-DD') <
                            ADD_MONTHS(TRUNC(SYSDATE, 'MONTH'),0)
                        AND TABLE_NAME = 'T_UNIT_WORKINFO'
                        AND PARTITION_NAME LIKE '%P_TBL_UNIT_WORKINFO_DAY_%') LOOP
                        V_SQL:='ALTER TABLE '||X.TABLE_NAME||' RENAME PARTITION "' || X.PARTITION_NAME || '" TO "' || 'P_TBL_UNIT_WORKINFO_20' ||TO_CHAR(TO_DATE(SUBSTR(REPLACE(X.PARTITION_NAME,'_',''), -6), 'YY-MM-DD'),'YYMMDD') || '"';
    EXECUTE IMMEDIATE V_SQL;
  END LOOP;
END;