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Posted to issues@hive.apache.org by "László Pintér (Jira)" <ji...@apache.org> on 2021/04/19 06:24:00 UTC
[jira] [Commented] (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:comment-tabpanel&focusedCommentId=17324725#comment-17324725 ]
László Pintér commented on HIVE-24928:
--------------------------------------
Thanks [~kgyrtkirk] [~mbod] [~pvary] for the reviews!
> 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
> Labels: pull-request-available
> Fix For: 4.0.0
>
> Time Spent: 6h 20m
> Remaining Estimate: 0h
>
> 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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