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https://issues.apache.org/jira/browse/CASSANDRA-5708?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tyler Hobbs updated CASSANDRA-5708:
-----------------------------------
Attachment: 5708-v1.txt
5708-v1.txt (and
[branch|https://github.com/thobbs/cassandra/tree/CASSANDRA-5708]) adds support
for IF EXISTS in DELETE statements. I've also created a
[dtest|https://github.com/thobbs/cassandra-dtest/tree/CASSANDRA-5708] to
exercise this.
I figured that we might add "IF EXISTS" support for UPDATE statements at some
point, so I added the {{ifExists}} attribute alongside {{ifNotExists}} in
{{ModificationStatement}}.
I'm not familiar with your grammar preferences yet, so let me know if you'd
like the grammar changes to be done another way.
> Add DELETE ... IF EXISTS to CQL3
> --------------------------------
>
> Key: CASSANDRA-5708
> URL: https://issues.apache.org/jira/browse/CASSANDRA-5708
> Project: Cassandra
> Issue Type: Improvement
> Reporter: Sylvain Lebresne
> Assignee: Tyler Hobbs
> Priority: Minor
> Fix For: 2.0.7
>
> Attachments: 5708-v1.txt
>
>
> I've been slightly lazy in CASSANDRA-5443 and didn't added a {{DELETE .. IF
> EXISTS}} syntax to CQL because it wasn't immediately clear what was the
> correct condition to use for the "IF EXISTS". But at least for CQL3 tables,
> this is in fact pretty easy to do using the row marker so we should probably
> add it.
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