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RE: re Index NOLOGGING -- was RE: ORA-1578...block corrupted...error is normal...a block...had a NOLOGGING...operation performed against

Allen, Brandon


Hemant, I'm not sure if you've been following the thread the whole time, but the issue we are currently addressing is the fact that the documentation clearly says that when an index is set to NOLOGGING (regardless of whether it was CREATEd or ALTERed NOLOGGING), that direct-path inserts will not be logged - see the logging_clause definition under the CREATE INDEX page at this link: http://download-west.oracle.com/docs/cd/B10501_01/server.920/a96540/statements_510a.htm#SQLRF01209):

Here is the relevant text:


Specify whether the creation of the index will be logged (LOGGING) or not logged (NOLOGGING) in the redo log file. This setting also determines whether subsequent Direct Loader (SQL*Loader) and direct-path INSERT operations against the index are logged or not logged. LOGGING is the default."

So, it appears that the documentation is incorrect - would you agree?

-----Original Message-----
From: Hemant K Chitale [mailto:hkchital@(protected)]
Sent: Wednesday, August 24, 2005 6:08 AM
To: Allen, Brandon; Jared Still
Cc: oracle-l@(protected)
Subject: re Index NOLOGGING -- was RE: ORA-1578...block
corrupted...error is normal...a block...had a NOLOGGING...operation
performed against

At 08:11 AM Wednesday, Allen, Brandon wrote:
>Here is another test indicating that a direct-path insert to a nologging
>index is actually logged (like Jared has also shown), which is contrary to
>the documentation.
>Notice that both the table and the index are created as NOLOGGING, but the
>tablespace containing the index (TOOLS) only gets marked as unrecoverable
>at the time of the index creation (16:42) and the unrecoverable time is
>not updated after the direct-path insert, whereas the tablespace
>containing the table (SYSTEM) *does* have its unrecoverable time updated
>at the time of the direct-path insert (16:48). So, it appears the table
>changes are not logged, and therefore are unrecoverable as would be
>expected, but the index changes *are* still logged and therefore the index
>is recoverable, contrary to the documentation:

Yes, of course. Even if you marked the Index NOLOGGING the Index Updates
were NOT bulk updates -- to the
Index they are regular DML. They will be LOGged. {The Index Create was a
NOLOGging operation, correctly}

Hemant K Chitale

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