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https://issues.apache.org/jira/browse/HIVE-18851?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Eugene Koifman updated HIVE-18851:
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Component/s: Transactions
> make Hive basic stats valid for ACID; clean up and refactor the code
> --------------------------------------------------------------------
>
> Key: HIVE-18851
> URL: https://issues.apache.org/jira/browse/HIVE-18851
> Project: Hive
> Issue Type: Bug
> Components: Statistics, Transactions
> Reporter: Sergey Shelukhin
> Priority: Major
> Labels: ACID
>
> HIVE-18571 started as a couple small fixes for MM tables, but ended up as a
> somewhat major cleanup of stats for ACID tables; however it doesn't do that
> rigorously and not for all cases.
> This is a follow-up JIRA to implement stats for ACID properly (potentially
> also with ACID semantics similar to those of queries, but that could be
> another follow-up - for now, at least they should be based on the correct set
> of files).
> Overall I've discovered that Hive stats code is spread all over in random
> places in code base and is brittle and inconsistent, esp. for any complex
> scenario like ACID tables.
> So, instead of making ad-hoc fixes everywhere, I think at the minimum it
> should be moved to a single spot (so that e.g. BasicStatsTask,
> BasicStatsTaskNoJob, metastore "quick" stats generation, etc all use the same
> code with the same logic) and made valid for ACID.
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