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Posted to commits@cassandra.apache.org by "Sam Tunnicliffe (JIRA)" <ji...@apache.org> on 2016/03/02 11:00:27 UTC
[jira] [Commented] (CASSANDRA-11295) Make custom filtering more
extensible via custom classes
[ https://issues.apache.org/jira/browse/CASSANDRA-11295?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15175368#comment-15175368 ]
Sam Tunnicliffe commented on CASSANDRA-11295:
---------------------------------------------
Pushed a branch with fairly trivial changes to allow the serializer for custom expressions to be plugged in via a system property. In the usual case, behaviour remains identical with before, so it's very low impact. The first new commit exposes a bit more of a statement's restrictions to the {{QueryHandler}}.
||branch||testall||dtest||
|[11295-trunk|https://github.com/beobal/cassandra/tree/11295-trunk]|[testall|http://cassci.datastax.com/view/Dev/view/beobal/job/beobal-11295-trunk-testall]|[dtest|http://cassci.datastax.com/view/Dev/view/beobal/job/beobal-11295-trunk-dtest]|
> Make custom filtering more extensible via custom classes
> ---------------------------------------------------------
>
> Key: CASSANDRA-11295
> URL: https://issues.apache.org/jira/browse/CASSANDRA-11295
> Project: Cassandra
> Issue Type: Improvement
> Components: Local Write-Read Paths
> Reporter: Sam Tunnicliffe
> Assignee: Sam Tunnicliffe
> Priority: Minor
> Fix For: 3.x
>
>
> At the moment, the implementation of {{RowFilter.CustomExpression}} is tightly bound to the syntax designed to support non-CQL search syntax for custom 2i implementations. It might be interesting to decouple the two things by making the custom expression implementation and serialization a bit more pluggable. This would allow users to add their own custom expression implementations to experiment with custom filtering strategies without having to patch the C* source. As a minimally invasive first step, custom expressions could be added programmatically via {{QueryHandler}}. Further down the line, if this proves useful and we can figure out some reasonable syntax we could think about adding the capability in CQL in a separate ticket.
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