[jira] [Assigned] (HIVE-18444) when creating transactional table make sure location has no data

["Eugene Koifman (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HIVE-18444?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Eugene Koifman reassigned HIVE-18444:
-------------------------------------

    Assignee: Vaibhav Gumashta

> when creating transactional table make sure location has no data
> ----------------------------------------------------------------
>
>                 Key: HIVE-18444
>                 URL: https://issues.apache.org/jira/browse/HIVE-18444
>             Project: Hive
>          Issue Type: Bug
>          Components: Transactions
>    Affects Versions: 1.0.0
>            Reporter: Eugene Koifman
>            Assignee: Vaibhav Gumashta
>            Priority: Major
>
> if a user creates a new transactional table but sets a location to some place that already has data any number of things can break.  
> Data may not be in Acid format, it may have been written by another cluster and txnids won't make sense in current cluster.  Once per table writeIDs (HIVE-18192) are there, if the data was written by another table, writeIDs won't match.
> This could actually work if the data at the existing location was not written by an acid write but it would be safer/cleaner to just prevent this (at least at first).



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