[CASSANDRA-8053] Support for user defined aggregate functions

• Type: New Feature
• Status: Resolved
• Priority: Normal
• Resolution: Fixed
• Fix Version/s: 2.2.0 beta 1
• Labels: cql udf
• Impacts: Docs
• Assignee: Robert Stupp
• Reporter: Robert Stupp

Authors

Robert Stupp

Reviewers

Tom Hobbs

• Created: 03/Oct/14 19:45
• Updated: 06/Nov/19 22:05
• Resolved: 11/Dec/14 17:50

Description

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

Issue Links

• is related to: CASSANDRA-7557 User permissions for UDFs
• is related to: CASSANDRA-7708 UDF schema change events/results
• is related to: CASSANDRA-4914 Aggregation functions in CQL
• is related to: CASSANDRA-7556 Update cqlsh for UDFs
• links to: Git branch (v2)