[jira] [Commented] (CASSANDRA-6750) Support for UPDATE predicates

["Sylvain Lebresne (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CASSANDRA-6750?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14248078#comment-14248078 ] 

Sylvain Lebresne commented on CASSANDRA-6750:
---------------------------------------------

I'm not entirely sure we should support this at all because that would require a read-before-write and I'd prefer leaving that kind of thing explicit to the user (by issuing a select, and then an update). And before someone bring this up, I'm well aware that we already have a read-before-write for lists, but that's more an example of a mistake we made and shouldn't reproduce than anything else.

> Support for UPDATE predicates
> -----------------------------
>
>                 Key: CASSANDRA-6750
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-6750
>             Project: Cassandra
>          Issue Type: New Feature
>          Components: API, Core
>         Environment: 2.0.3
>            Reporter: nivance
>            Assignee: Benjamin Lerer
>            Priority: Minor
>              Labels: cql3, ponies
>
> cqlsh:spdatarp> UPDATE t_spdatarpro_ro SET amount = 10  WHERE messageid = '123456';
> Bad Request: Non PRIMARY KEY messageid found in where clause
> In this case, messageid is the secend index. I want to update all rows which messageid is '123456', but it failed



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