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https://issues.apache.org/jira/browse/CASSANDRA-7395?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Robert Stupp updated CASSANDRA-7395:
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Comment: was deleted
(was: bq. UDF the ORDER BY
No. You cannot apply any "custom" ordering. C* currently allows ordering on the
clustering key column(s).
OTOH it's possible to insert values processed by a UDF - e.g. {{insert into
comp_key (part_key, clust_key, val) values (1, somefunction(2), 'three');}} -
but that's nothing you couldn't do without UDFs :))
> Support for pure user-defined functions (UDF)
> ---------------------------------------------
>
> Key: CASSANDRA-7395
> URL: https://issues.apache.org/jira/browse/CASSANDRA-7395
> Project: Cassandra
> Issue Type: New Feature
> Components: API, Core
> Reporter: Jonathan Ellis
> Assignee: Robert Stupp
> Labels: client-impacting, cql, docs-impacting
> Fix For: 3.0
>
> Attachments: 7395-dtest.txt, 7395.txt, udf-create-syntax.png,
> udf-drop-syntax.png
>
>
> We have some tickets for various aspects of UDF (CASSANDRA-4914,
> CASSANDRA-5970, CASSANDRA-4998) but they all suffer from various degrees of
> ocean-boiling.
> Let's start with something simple: allowing pure user-defined functions in
> the SELECT clause of a CQL query. That's it.
> By "pure" I mean, must depend only on the input parameters. No side effects.
> No exposure to C* internals. Column values in, result out.
> http://en.wikipedia.org/wiki/Pure_function
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