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From Mehran Sowdaey <Mehran.Sowd...@Sun.COM>
Subject Re: table locking
Date Tue, 29 Nov 2005 21:55:35 GMT
thanks Oystein and Mike for replying. Changing the question slightly,
with Oracle under the same circumstances session 2 can see the committed
data (default isolation level is read committed). The developers want to
see the same in derby, is that possible?




Øystein Grøvlen wrote On 11/24/05 05:43,:
> You might get a table lock when scanning the whole table (as a select
> without a predicate will do).  However, this query would not succeed
> even if row locking was used, since the scan would be blocked by the
> lock on (c,d).  
> 
> Except when using 'read uncommitted' isolation level, a query will be
> blocked when it encounters a row with uncommitted changes.
> 



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