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https://issues.apache.org/jira/browse/CASSANDRA-8053?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14237152#comment-14237152
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Robert Stupp commented on CASSANDRA-8053:
-----------------------------------------
New patch v2 added with following changes:
* remove FINALTYPE keyword (STYPE is mandatory)
* use separate schema table for aggregates
* remove lazy initialization of migrated aggregates (creates "broken"
aggregates if referenced state/final function does not yet exist)
* minor fix for cqlsh to not include "TOKEN" with tab completion
/cc [~thobbs]
> Support for user defined aggregate functions
> --------------------------------------------
>
> Key: CASSANDRA-8053
> URL: https://issues.apache.org/jira/browse/CASSANDRA-8053
> Project: Cassandra
> Issue Type: New Feature
> Reporter: Robert Stupp
> Assignee: Robert Stupp
> Labels: cql, udf
> Fix For: 3.0
>
> Attachments: 8053v1.txt
>
>
> CASSANDRA-4914 introduces aggregate functions.
> This ticket is about to decide how we can support "user defined aggregate
> functions". UD aggregate functions should be supported for all UDF flavors
> (class, java, jsr223).
> Things to consider:
> * Special implementations for each scripting language should be omitted
> * No exposure of internal APIs (e.g. {{AggregateFunction}} interface)
> * No need for users to deal with serializers / codecs
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