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Posted to commits@cassandra.apache.org by "Mck SembWever (JIRA)" <ji...@apache.org> on 2011/06/22 22:56:48 UTC
[jira] [Commented] (CASSANDRA-1125) Filter out ColumnFamily rows
that aren't part of the query
[ https://issues.apache.org/jira/browse/CASSANDRA-1125?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13053467#comment-13053467 ]
Mck SembWever commented on CASSANDRA-1125:
------------------------------------------
I can use a {{KeyRange}} and {{Range.intersectionWith(..)}} for start/end limits in CFIF.
And i can use a {{IndexClause}} (which also permits a start_key) and then {{get_indexed_slices(..)}} in CFRR's {{RowIterator.maybeInit()}}
But both approaches can't be combined. So i guess ConfigHelper could have methods setInputKeyRange(..) and setInputIndexClause(..) which are mutually exclusive to call.
> Filter out ColumnFamily rows that aren't part of the query
> ----------------------------------------------------------
>
> Key: CASSANDRA-1125
> URL: https://issues.apache.org/jira/browse/CASSANDRA-1125
> Project: Cassandra
> Issue Type: New Feature
> Components: Hadoop
> Reporter: Jeremy Hanna
> Priority: Minor
> Fix For: 1.0
>
>
> Currently, when running a MapReduce job against data in a Cassandra data store, it reads through all the data for a particular ColumnFamily. This could be optimized to only read through those rows that have to do with the query.
> It's a small change but wanted to put it in Jira so that it didn't fall through the cracks.
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