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https://issues.apache.org/jira/browse/HADOOP-2021?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Edward Yoon updated HADOOP-2021:
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Description: If we don't have an index for a domain in the join, we can
still improve on the nested-loop join using sort join. (was: * stands for the
usual comparison operators '<','<=', '>', '>=', '!=', '='
* comparing terms in the Q clauses can be arbitrarily connected with boolean
operators AND, NOT, OR
{code}
ex. (a.value = b.value and a.key != b.key)
{code})
> Sort Join Implementation
> ------------------------
>
> Key: HADOOP-2021
> URL: https://issues.apache.org/jira/browse/HADOOP-2021
> Project: Hadoop
> Issue Type: Sub-task
> Components: contrib/hbase
> Affects Versions: 0.14.1
> Environment: all environments
> Reporter: Edward Yoon
> Priority: Minor
> Fix For: 0.16.0
>
>
> If we don't have an index for a domain in the join, we can still improve on
> the nested-loop join using sort join.
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