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From "DOAN DuyHai (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (CASSANDRA-11175) Extend support for post-reconcilliation processing to all read commands
Date Wed, 17 Feb 2016 11:34:18 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-11175?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15150347#comment-15150347
] 

DOAN DuyHai edited comment on CASSANDRA-11175 at 2/17/16 11:33 AM:
-------------------------------------------------------------------

Idea: user can push reconciliation logic through the UDF API ?

{code:sql}
CREATE TABLE xxxx (
    pk int PRIMARY KEY,
    val text RECONCILE WITH my_keyspace.my_function
) ;
{code}


was (Author: doanduyhai):
Idea: user can push reconciliation logic through the UDF API ?

> Extend support for post-reconcilliation processing to all read commands
> -----------------------------------------------------------------------
>
>                 Key: CASSANDRA-11175
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-11175
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: CQL
>            Reporter: Sam Tunnicliffe
>            Assignee: Sam Tunnicliffe
>            Priority: Minor
>             Fix For: 3.x
>
>
> CASSANDRA-8717 introduced limited support for processing or transformation of query results
on the coordinator, which occurs after the results from individual replicas have been reconciled.
At the moment this is limited to queries which utilise secondary indexes and the post-processing
function itself is provided by the index implementation. It would be useful if this were expanded
so that any read command may include a post-reconcilliation processing step. A straightforward
way to control this would be via a custom {{QueryHandler}}. 



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