RE: Export datapump is INCONSISTENT

  • From: "Allen, Brandon" <Brandon.Allen@xxxxxxxxxxx>
  • To: "oracle-l@xxxxxxxxxxxxx" <oracle-l@xxxxxxxxxxxxx>, Yong Huang <yong321@xxxxxxxxx>
  • Date: Fri, 17 Jun 2011 11:20:17 -0700


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@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: 
 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@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/********@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 

hh24:mi:ss'),'yyyy-mm-dd hh24:mi:ss')"

Maybe I'll file an enhancement request for it.


-----Original Message-----
From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On 
Behalf Of Yong Huang

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

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