incubator-cassandra-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Edward Capriolo <edlinuxg...@gmail.com>
Subject Re: CQL3 and counters
Date Sat, 02 Mar 2013 00:25:21 GMT
Don't delete them either!
On Friday, March 1, 2013, Alain RODRIGUEZ <arodrime@gmail.com> wrote:
> "DO *NOT* USE THAT!!!"
>
> Crystal clear ;-). Thanks for the warning.
>
> Alain
>
> 2013/3/1 Sylvain Lebresne <sylvain@datastax.com>
>>>
>>> On C* 1.2.1 I see that the following query works:
>>>
>>>    update counters set value=value+5 where owner_id='1' and
counter_type='trash';
>>>
>>> ...while the following one gives an error (Bad Request: Invalid
non-counter operation on counter table):
>>>
>>>    update counters set value=5 where owner_id='1' and
counter_type='trash';
>>>
>>>
>>> In C* 1.2.2. the latter started to work.
>>
>> Thanks for this opportunity to say: DO *NOT* USE THAT!!!
>> The fact that that C* 1.2.2 acepts 'update counters set value=5 where
...' is a bug, https://issues.apache.org/jira/browse/CASSANDRA-5300 namely.
>> If you do perform such a query, it *will corrupt* the counter.
>> So until 1.2.3 is released, please do not set a counter directly
(continue using only increment and decrement).
>>
>>>
>>> And, more important, wouldn't be a Great(™) idea to allow direct
setting of counters
>>
>> It would be great yes if we knew how to make that work, but we don't.
And more precisely, setting a counter directly is not something compatible
with the current way counters are implemented (for the very same reason
than deletes don't really work with counters either: you can delete but
only as a definitive way to get rid of the counter. If you re-increment the
counter post-delete, anything can happen). We would have done it otherwise.
>> --
>> Sylvain
>

Mime
View raw message