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https://issues.apache.org/jira/browse/HIVE-24075?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ASF GitHub Bot updated HIVE-24075:
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Labels: pull-request-available (was: )
> Optimise KeyValuesInputMerger
> -----------------------------
>
> Key: HIVE-24075
> URL: https://issues.apache.org/jira/browse/HIVE-24075
> Project: Hive
> Issue Type: Improvement
> Reporter: Rajesh Balamohan
> Priority: Major
> Labels: pull-request-available
> Time Spent: 10m
> Remaining Estimate: 0h
>
> Comparisons in KeyValueInputMerger can be reduced.
> [https://github.com/apache/hive/blob/master/ql/src/java/org/apache/hadoop/hive/ql/exec/tez/tools/KeyValuesInputMerger.java#L165|https://github.infra.cloudera.com/CDH/hive/blob/cdpd-master/ql/src/java/org/apache/hadoop/hive/ql/exec/tez/tools/KeyValuesInputMerger.java#L165]
> [https://github.infra.cloudera.com/CDH/hive/blob/cdpd-master/ql/src/java/org/apache/hadoop/hive/ql/exec/tez/tools/KeyValuesInputMerger.java#L150|https://github.com/apache/hive/blob/master/ql/src/java/org/apache/hadoop/hive/ql/exec/tez/tools/KeyValuesInputMerger.java#L150]
> If the reader comparisons in the queue are same, we could reuse
> "{{nextKVReaders}}" in next subsequent iteration instead of doing the
> comparison all over again.
> [https://github.com/apache/hive/blob/master/ql/src/java/org/apache/hadoop/hive/ql/exec/tez/tools/KeyValuesInputMerger.java#L178]
>
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