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Posted to issues@hive.apache.org by "Jesus Camacho Rodriguez (JIRA)" <ji...@apache.org> on 2017/08/08 01:45:03 UTC
[jira] [Work started] (HIVE-17265) Cache merged column stats from
retrieved partitions
[ https://issues.apache.org/jira/browse/HIVE-17265?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Work on HIVE-17265 started by Jesus Camacho Rodriguez.
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> Cache merged column stats from retrieved partitions
> ---------------------------------------------------
>
> Key: HIVE-17265
> URL: https://issues.apache.org/jira/browse/HIVE-17265
> Project: Hive
> Issue Type: Bug
> Components: Statistics
> Affects Versions: 3.0.0
> Reporter: Jesus Camacho Rodriguez
> Assignee: Jesus Camacho Rodriguez
>
> Currently when we retrieve stats from the metastore for a column in a partitioned table, we will execute the logic to merge the column stats coming from each partition multiple times.
> Even though we avoid multiple calls to metastore if the cache for the stats in enabled, merging the stats for a given column can take a large amount of time if there is a large number of partitions.
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