[CASSANDRA-7395] Support for pure user-defined functions (UDF)

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

Authors

Robert Stupp

Reviewers

Tom Hobbs

• Tester: Shawn Kumar
• Created: 12/Jun/14 19:49
• Updated: 06/Nov/19 22:04
• Resolved: 08/Aug/14 19:15

Description

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

Issue Links

• is depended upon by: CASSANDRA-7563 UserType, TupleType and collections in UDFs
• is depended upon by: CASSANDRA-7737 Update CQL doc for UDF
• is depended upon by: CASSANDRA-7458 functional indexes
• is depended upon by: CASSANDRA-7391 Partial indexes
• is depended upon by: CASSANDRA-7562 Java source code for UDFs
• is depended upon by: CASSANDRA-7556 Update cqlsh for UDFs
• is related to: CASSANDRA-7557 User permissions for UDFs
• is related to: CASSANDRA-7708 UDF schema change events/results
• is related to: CASSANDRA-7924 Optimization of Java UDFs
• is related to: CASSANDRA-7526 Defining UDFs using scripting language directly from CQL
• is related to: CASSANDRA-7674 Add implicit casting of UDF arguments
• is related to: CASSANDRA-7677 UDF stdlib
• relates to: CASSANDRA-7697 UDF use new schema migration