Re: ORA-01555 Mystery (Help)

In Tom Kyte's book Expert 1-on-1
he says to ANALYZE the table BEFORE starting a big query. Read Chapter 5, starting on page 185 for a complete explanation.

Walter K wrote:
>
> Hi,
>
> A user in our data warehousing group is running into
> the old ORA-01555 (snapshot too old) error every time
> she runs a massive (20 million rows) select against
> one table via a view. I confirmed that the view only
> translates to the one table.
>
> The user swears that no one would be making any
> updates/deletes to the table she is selecting from. I
> suggested she lock the table in exclusive mode, prior
> to running her massive select to guarantee no one else
> could change the data in the table and cause the
> triggering of the 1555 error. Locking the table was a
> viable option because it's a staging table in the
> warehouse itself. She locked the table in exclusive
> mode last night and it locked; fired off her query,
> and it failed 5 hours later with the 1555 error again.
>
> I'm stumped on this. I just don't see how this is
> possible. Any suggestions?
>
> Thanks!!!
> -w
>
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> Author: Walter K
> INET: alden14004_at_yahoo.com
>
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Charlie Mengler                       Maintenance Warehouse  
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