required archivelog files for a guaranteed restore point 查找GRP需要的归档文件

Applies to:

Oracle Database - Enterprise Edition - Version 11.2.0.2 and later

Information in this document applies to any platform.

Goal

How can you determine the required archivelog files needed for a guaranteed restore point before running flashback database?

Solution

The following query should give this information:

SELECT DISTINCT al.thread#, al.sequence#, al.resetlogs_change#, al.resetlogs_time

FROM v$archived_log al,

(select grsp.rspfscn from_scn,

grsp.rspscn to_scn,

dbinc.resetlogs_change# resetlogs_change#,

dbinc.resetlogs_time resetlogs_time

from xkccrsp grsp, vdatabase_incarnation dbinc

where grsp.rspincarn = dbinc.incarnation#

and bitand(grsp.rspflags, 2) != 0

and bitand(grsp.rspflags, 1) = 1 -- guaranteed

and grsp.rspfscn <= grsp.rspscn -- filter clean grp

and grsp.rspfscn != 0

) grsp

WHERE al.next_change# >= grsp.from_scn

AND al.first_change# <= (grsp.to_scn + 1)

AND al.resetlogs_change# = grsp.resetlogs_change#

AND al.resetlogs_time = grsp.resetlogs_time

AND al.archived = 'YES';