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https://issues.apache.org/jira/browse/HIVE-17634?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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liyunzhang_intel updated HIVE-17634:
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Description: In the statistics
estimation([StatsRulesProcFactory|https://github.com/apache/hive/blob/master/ql/src/java/org/apache/hadoop/hive/ql/optimizer/stats/annotation/StatsRulesProcFactory.java#L134]),
we do not estimate the column stats once we set hive.stats.fetch.column.stats
as false.Suggest to estimate the data size by column type when
{{hive.stats.fetch.column.stats}} as false like HIVE-17634.1.patch does. (was:
In the statistics estimation([StatsRulesProcFactory|), we do not estimate the
column stats once we set hive.stats.fetch.column.stats as false.Suggest to
estimate the data size by column type when {{hive.stats.fetch.column.stats}} as
false like HIVE-17634.1.patch does.)
> Estimate the column stats even not retrieve columns from
> metastore(hive.stats.fetch.column.stats as false)
> ----------------------------------------------------------------------------------------------------------
>
> Key: HIVE-17634
> URL: https://issues.apache.org/jira/browse/HIVE-17634
> Project: Hive
> Issue Type: Bug
> Reporter: liyunzhang_intel
> Assignee: liyunzhang_intel
> Attachments: HIVE-17634.1.patch, HIVE-17634.patch
>
>
> In the statistics
> estimation([StatsRulesProcFactory|https://github.com/apache/hive/blob/master/ql/src/java/org/apache/hadoop/hive/ql/optimizer/stats/annotation/StatsRulesProcFactory.java#L134]),
> we do not estimate the column stats once we set
> hive.stats.fetch.column.stats as false.Suggest to estimate the data size by
> column type when {{hive.stats.fetch.column.stats}} as false like
> HIVE-17634.1.patch does.
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