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From "Mck SembWever (JIRA)" <j...@apache.org>
Subject [jira] Issue Comment Edited: (CASSANDRA-1125) Filter out ColumnFamily rows that aren't part of the query
Date Mon, 03 Jan 2011 19:00:59 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-1125?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12976876#action_12976876
] 

Mck SembWever edited comment on CASSANDRA-1125 at 1/3/11 1:58 PM:
------------------------------------------------------------------

Jonathan: do you mean the IndexExpression and IndexClause and Table.open("Keyspace1").getColumnFamilyStore("Indexed1").scan(clause,
filter);
 being used inside of ColumnFamilyRecordReader.maybeInit() ??


      was (Author: michaelsembwever):
    Jonathan: do you mean the IndexExpression and IndexClause and Table.open("Keyspace1").getColumnFamilyStore("Indexed1").scan(clause,
filter);
 inside of ColumnFamilyRecordReader.maybeInit() ??

  
> 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: Improvement
>          Components: Hadoop
>            Reporter: Jeremy Hanna
>            Priority: Minor
>             Fix For: 0.7.1
>
>
> 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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