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From "Jonathan Ellis (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-2555) Explicit timestamp support for CQL
Date Thu, 28 Apr 2011 14:33:03 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-2555?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13026322#comment-13026322
] 

Jonathan Ellis commented on CASSANDRA-2555:
-------------------------------------------

{code}
                    if (up.isSetTimestamp())
                        throw new InvalidRequestException(
                                "Timestamp must be set on the BATCH, not individual statements");

{code}

Unlike ConsistencyLevel, it can make sense to have different timestamps on the individual
updates. So we should only reject this if there is a ts on the batch as well.  (I.e., ts on
batch = ok, ts on individual updates = ok, ts on both = confusing and not ok.)

bq. 3 tests added

if it doesn't cause conflicts, can you move these into existing batch/update/insert tests?
 There is a very high per-method overhead in test_cql since it tears down, wipes, and restarts
the server for each.

> Explicit timestamp support for CQL
> ----------------------------------
>
>                 Key: CASSANDRA-2555
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-2555
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: API
>            Reporter: Jonathan Ellis
>            Assignee: Pavel Yaskevich
>             Fix For: 0.8.1
>
>         Attachments: CASSANDRA-2555.patch
>
>
> To make CQL BATCHes useful for the normal purpose of idempotent retries, we need to add
 support for client-supplied timestamps.  At a minimum this needs to be available for a batch
(BEGIN BATCH USING TIMESTAMP 1303743619771318) but might also be nice at the statement level
(UPDATE ... USING TIMESTAMP ...).

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