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Posted to issues@hive.apache.org by "László Pintér (Jira)" <ji...@apache.org> on 2021/03/24 08:19:00 UTC

[jira] [Assigned] (HIVE-24928) In case of non-native tables use basic statistics from HiveStorageHandler

     [ https://issues.apache.org/jira/browse/HIVE-24928?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

László Pintér reassigned HIVE-24928:
------------------------------------


> In case of non-native tables use basic statistics from HiveStorageHandler
> -------------------------------------------------------------------------
>
>                 Key: HIVE-24928
>                 URL: https://issues.apache.org/jira/browse/HIVE-24928
>             Project: Hive
>          Issue Type: Bug
>          Components: Hive
>    Affects Versions: 4.0.0
>            Reporter: László Pintér
>            Assignee: László Pintér
>            Priority: Major
>             Fix For: 4.0.0
>
>
> When we are running `ANALYZE TABLE ... COMPUTE STATISTICS` or `ANALYZE TABLE ... COMPUTE STATISTICS FOR COLUMNS` all the basic statistics are collected by the BasicStatsTask class. This class tries to estimate the statistics by scanning the directory of the table. 
> In the case of non-native tables (iceberg, hbase), the table directory might contain metadata files as well, which would be counted by the BasicStatsTask when calculating basic stats. 
> Instead of having this logic, the HiveStorageHandler implementation should provide basic statistics.



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