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https://issues.apache.org/jira/browse/HIVE-17214?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16161762#comment-16161762
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Eugene Koifman commented on HIVE-17214:
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HIVE-17505 has way to produce "non-standard" layout that non-acid to acid
conversion should ideally handle
> check/fix conversion of non-acid to acid
> ----------------------------------------
>
> Key: HIVE-17214
> URL: https://issues.apache.org/jira/browse/HIVE-17214
> Project: Hive
> Issue Type: Sub-task
> Components: Transactions
> Reporter: Eugene Koifman
> Assignee: Eugene Koifman
>
> bucketed tables have stricter rules for file layout on disk - bucket files
> are direct children of a partition directory.
> for un-bucketed tables I'm not sure there are any rules
> for example, CTAS with Tez + Union operator creates 1 directory for each leg
> of the union
> Supposedly Hive can read table by picking all files recursively.
> Can it also write (other than CTAS example above) arbitrarily?
> Does it mean Acid write can also write anywhere?
> Figure out what can be supported and how can existing layout can be checked?
> Examining a full "ls -l -R" for a large table could be expensive.
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