RE: Export datapump is INCONSISTENT

From: Allen, Brandon <>
Date: Fri, 17 Jun 2011 11:20:17 -0700
Message-ID: <64BAF54438380142A0BF94A23224A31E125C4F492F_at_ONEWS06.oneneck.corp>


I just found that Oracle has quietly added support for the old CONSISTENT parameter back in data pump. I'm not sure exactly when they added it and I couldn't find any documentation of it in the online docs or on MOS, other than a mention of it in bug 9243068. I filed an enhancement request for this (bug 12360744) and they accepted it, but they never told me they already made the enhancement in 11g. However, I tested it on an database on Windows, with patch bundle 6 installed, and it definitely works as you can see below - notice it says it's in "Legacy Mode" so I'm not sure what all the implication of that are. It works with both "consistent=y" and "consistent=true". I also found that setting flashback_time=systimestamp works in and it doesn't give the "Legacy Mode" message, so maybe that's a better option. Neither of these parameters worked in another database that I tested. I haven't tried any other versions yet.

E:\xyzdevDBExports>expdp system/pwd_at_xyzdev tables=tridata.T_CLASSIFICATION,tridata.t_tristatus consistent=y dumpfile =xyzdev_tst logfile=xyzdev_tst

Export: Release - Production on Fri Jun 17 10:15:30 2011


Legacy Mode Active due to the following parameters: Legacy Mode Parameter: "consistent=TRUE" Location: Command Line, Replaced with: "flashback_time=TO_TIMESTAMP('2011-06-17  10:15:30', 'YYYY-MM-DD HH24:MI:SS')"
Legacy Mode has set reuse_dumpfiles=true parameter.


Job "SYSTEM"."SYS_EXPORT_TABLE_01" successfully completed at 10:15:36

E:\xyzdevDBExports>expdp system/pwd_at_xyzdev tables=tridata.T_CLASSIFICATION,tridata.t_tristatus flashback_time=systimestamp dumpfile=xyzdev_tst logfile=xyzdev_tst

Export: Release - Production on Fri Jun 17 10:37:46 2011


Starting "SYSTEM"."SYS_EXPORT_TABLE_01": system/********_at_xyzdev tables=tridata.T_CLASSIFICATION,tridata.t_tristatus fla shback_time=systimestamp dumpfile=xyzdev_tst logfile=xyzdev_tst


Job "SYSTEM"."SYS_EXPORT_TABLE_01" successfully completed at 10:37:52


-----Original Message-----
From: Allen, Brandon
Sent: Thursday, February 10, 2011 12:13 PM To: Yong Huang; Oracle-l Digest Users; Jcmiranda Subject: Re: Export datapump is INCONSISTENT

Thanks Yong and Juan for the helpful info. I had also been under the misconception that data pump was consistent by default. I just wanted to add that MOS Doc ID 377218.1 also provides some detail on this topic. The Oracle documentation and expdp output is very misleading on this so I wouldn't be surprised if there are many more people out there that are also confused and unaware that their data pump exports are inconsistent. I think Oracle should either bring back the consistent=y parameter for data pump, or add an option for flashback_time=now or flashback_scn=current or something like that instead of this ridiculously long string that you have to use instead to get the same functionality:

        flashback_time="to_timestamp(to_char(sysdate,'yyyy-mm-dd hh24:mi:ss'),'yyyy-mm-dd hh24:mi:ss')"

Maybe I'll file an enhancement request for it.


-----Original Message-----
From: [] On Behalf Of Yong Huang

I did some research on data pump export flashback_time and flashback_scn at

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Received on Fri Jun 17 2011 - 13:20:17 CDT

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