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
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