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From "Benjamin Lerer (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-6237) Allow range deletions in CQL
Date Wed, 03 Sep 2014 08:05:52 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-6237?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14119521#comment-14119521
] 

Benjamin Lerer commented on CASSANDRA-6237:
-------------------------------------------

The scope of the ticket, as I understand it, is to support slicing on the last clustering
column specified within the query. It seems to me that adding support for multi-column relations
goes beyond that.

Ideally what we would want is to be able to support all the possible combinations supported
by SelectStatement for delete and update but this require in my opinion to:
1) Refactor SelectStatement to make some part of it easily reusable
2) Refactor ModificationStatement to allow it to reuse the Restrictions logic form SelectStatement

The question being: do we extends the scope of this ticket or do we create one or two others
for those tasks?

I also think it will be good if we make sure first that all the pending patch affecting SelectStatement
are commited before we try to refactor it.

> Allow range deletions in CQL
> ----------------------------
>
>                 Key: CASSANDRA-6237
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-6237
>             Project: Cassandra
>          Issue Type: Improvement
>            Reporter: Sylvain Lebresne
>            Assignee: Benjamin Lerer
>            Priority: Minor
>              Labels: cql, docs
>             Fix For: 3.0
>
>         Attachments: CASSANDRA-6237.txt
>
>
> We uses RangeTombstones internally in a number of places, but we could expose more directly
too. Typically, given a table like:
> {noformat}
> CREATE TABLE events (
>     id text,
>     created_at timestamp,
>     content text,
>     PRIMARY KEY (id, created_at)
> )
> {noformat}
> we could allow queries like:
> {noformat}
> DELETE FROM events WHERE id='someEvent' AND created_at < 'Jan 3, 2013';
> {noformat}



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