cassandra-commits mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Robert Stupp (JIRA)" <>
Subject [jira] [Commented] (CASSANDRA-7395) Support for pure user-defined functions (UDF)
Date Mon, 23 Jun 2014 09:19:24 GMT


Robert Stupp commented on CASSANDRA-7395:

CASSANDRA-7392 describes that it should be possible to interrupt "zombie" queries. It might
be useful for badly coded UDFs ("sick endless loop" - might easily happen during development).
But I've no quick idea how to gracefully stop a thread that's not in a wait(), sleep() or
whatever unless a separate thread is used for UDF evaluation which adds at least .5ms latency
for each UDF call.

> Support for pure user-defined functions (UDF)
> ---------------------------------------------
>                 Key: CASSANDRA-7395
>                 URL:
>             Project: Cassandra
>          Issue Type: New Feature
>          Components: API, Core
>            Reporter: Jonathan Ellis
>             Fix For: 3.0
>         Attachments: 7395.diff
> 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.

This message was sent by Atlassian JIRA

View raw message