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https://issues.apache.org/jira/browse/CASSANDRA-4545?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13465018#comment-13465018
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Sylvain Lebresne commented on CASSANDRA-4545:
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bq. Why is that? Can't I write UPDATE foo SET x = x + 1, y = y + 2, ... ?
Sure you can, but that only works for columns in the same "CQL" row. If you
have a wide row (a.k.a a composite PK), you can't update multiple ones without
a BATCH (and for *the* good use case of counters, realtime analytics, doing
time series of counter is really useful). And without a BATCH, you do lose the
atomicity and isolation we currently have in that case (on top of the
performance penalty).
bq. to give people a gun to shoot their feet with
I'm not sure I understand why that's so much a "gun to shoot their feet with".
As far as I can tell, allowing counter batches adds no foot shooting over
allowing counters (which have by themsleves some foot shooting involved, but
that's another problem). You should not replay counter inserts, but whether
they are in batch or not don't make a whole of a difference (in both case you
don't know what insert went in or not).
> add cql support for batchlog
> ----------------------------
>
> Key: CASSANDRA-4545
> URL: https://issues.apache.org/jira/browse/CASSANDRA-4545
> Project: Cassandra
> Issue Type: Sub-task
> Reporter: Jonathan Ellis
> Assignee: Aleksey Yeschenko
> Attachments: CASSANDRA-4545.txt
>
>
> Need to expose the equivalent of atomic_batch_mutate (CASSANDRA-4542) to CQL3.
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