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https://issues.apache.org/jira/browse/CASSANDRA-1125?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13053467#comment-13053467
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Mck SembWever edited comment on CASSANDRA-1125 at 6/22/11 9:08 PM:
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I can use a {{KeyRange}} and {{Range.intersectionWith(..)}} for start/end
rowKey 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.- Spoke a little early here about using {{get_indexed_slices}}. I can't
see how IndexClause can specify a start/end rowKey - is this possible?
was (Author: michaelsembwever):
I can use a {{KeyRange}} and {{Range.intersectionWith(..)}} for start/end
rowKey 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.- Spoke a little earlier about using {{get_indexed_slices}}. I can't
see how IndexClause can specify a start/end rowKey - is this possible?
> 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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