Re: JDBC gripe list (the autocommit subthread)

So what is the use case for autocommit = true for batch inserts ?

to me the whole point of batch inserts is speed with autocommit= false
it should be faster. I would also think the logic is much simpler if I
get an all or nothing commit.


Dave Cramer

dave.cramer(at)credativ(dot)ca
http://www.credativ.ca




On Thu, Mar 31, 2011 at 5:34 PM, Quartz <quartz12h@yahoo.com> wrote:
>> I'm coming around to the position that we shouldn't tinker
>> with
>> autoCommit within the executeBatch method.  I still
>> think it would
>> be best for us to consistently bail out on the first
>> failure, but if
>> autoCommit is on, we could build the BatchUpdateException
>> using an
>> array of the length of the successfully completed
>> statements.  If
>> autoCommit is off, I'm not sure whether it would be better
>> to leave
>> the updateCounts property null or use a zero length array;
>> but
>> clearly no statements should be considered successful.
>>
>> The API documentation does seem to suggest it should work
>> that way.
>>
>> The bad news is that this would be a behavior change, and
>> could thus
>> break existing code for current PostgreSQL users.
>> When that's the
>> case, we generally like to see a reasonable use case for
>> the new
>> behavior even when it is standard.  So far we have a
>> rather
>> hand-wavy assertion that it would be useful for logging and
>> "an
>> infinite number of" other uses.  It would probably
>> help sway the
>> community if there was a more concrete explanation of why
>> this was
>> better than the alternatives for logging purposes, and to
>> sketch out
>> one or two of the other infinite number of use cases.
>
>
> You have been defending all that long that most use the autocommit=false when using batches. Then they won't
break....!
>
> Besides that's what release notes are for. And I dare say, if they expected a transaction when using a batch with
autocommit=true,it about time they learn their mistake. JDBC api is a contract. Can't make exception for postgres. 
>
>
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