为前缀表如何服务于Flashback Data Archive(7)

4 - filter("ENDSCN">12723393908514 AND "ENDSCN"<=12723394060501 AND ("STARTSCN" IS NULL OR
              "STARTSCN"<=12723393908514) AND ("OPERATION" IS NULL OR "OPERATION"<>'D'))
  5 - filter("STARTSCN"<=12723393908514 OR "STARTSCN" IS NULL)
  8 - filter("T"."VERSIONS_STARTSCN" IS NULL)
  9 - access("RID"(+)=ROWIDTOCHAR("T".ROWID))
      filter("RID"(+)=ROWIDTOCHAR("T".ROWID))
  10 - filter(("ENDSCN"(+) IS NULL OR "ENDSCN"(+)>12723394060501) AND ("STARTSCN"(+) IS NULL OR
              "STARTSCN"(+)<12723394060501))
             
col OWNER_NAME format a10
set numwidth 4
col FLASHBACK_ARCHIVE_NAME format a10
col create_time format a35
col last_purge_time format a35
set linesize 140
select * from dba_flashback_archive_tables where table_name='T0516_7';             
TABLE_NAME                    OWNER_NAME FLASHBACK_ ARCHIVE_TABLE_NAME                                    STATUS
------------------------------ ---------- ---------- ----------------------------------------------------- -------------
T0516_7                        SCOTT      FBA0513    SYS_FBA_HIST_549255                                  ENABLED

--清空flashback archive
SYS@tstdb1-SQL> alter flashback archive FBA0513 purge all;

Flashback archive altered.

SQL> select count(*) from SYS_FBA_HIST_549255;

COUNT(*)
----------
        0

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