re Export/Import SYS -- was sRe: import from Oracle 9 to 10 hanging

  • From: Hemant K Chitale <hkchital@xxxxxxxxxxxxxx>
  • To: oracle-l <oracle-l@xxxxxxxxxxxxx>
  • Date: Fri, 29 Jun 2007 20:05:31 +0800


LSC is right .

1. SYS is not to be used for Exports. Note#277237.1 explains why one should not connect as SYS when running an Export. Essentially, since SYS does not follow the transaction level read-consistency rules, an Export as SYS does not provide data
consistency (even if CONSISTENT=Y is used).
[The only reasons to use SYS would be when specifically requested by Oracle Support
or for Transportable Tablespaces]

2.  SYS is excluded when running a EXP with FULL=Y.
I did a quick scan of catexp.sql and found the exclusions for ORDSYS, MDSYS, CTXSYS etc but couldn't find explicit code which shows how SYS is excluded. [Probably the exclusion
is not in catexp.sql but in the oracle (exp) binary ?]


At 04:48 PM Friday, LS Cheng wrote:
export full does not export sys (and several), may be that sounds better ;-)

Thanks

--
LSC


On 6/29/07, Stefan Knecht <<mailto:knecht.stefan@xxxxxxxxx> knecht.stefan@xxxxxxxxx> wrote:
Of course you can export sys:



Hemant K Chitale
http://web.singnet.com.sg/~hkchital
and
http://hemantscribbles.blogspot.com
and
http://hemantoracledba.blogspot.com

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