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From "Raghotham Murthy (JIRA)" <>
Subject [jira] Commented: (HIVE-518) test mode in hive
Date Wed, 27 May 2009 18:07:45 GMT


Raghotham Murthy commented on HIVE-518:

one solution would be to provide another set option with the list of tables which should not
be sampled in test mode.

set hive.test.mode.unsampled.tables=table1,table2

Another option might be to actually allow users to specify the entire tablesample clause for
every table that needs to sampled in test-mode. But that seems like a lot more work for not
a lot of additional benefit.

> test mode in hive
> -----------------
>                 Key: HIVE-518
>                 URL:
>             Project: Hadoop Hive
>          Issue Type: Bug
>          Components: Query Processor
>    Affects Versions: 0.3.1
>            Reporter: Namit Jain
>            Assignee: Namit Jain
>             Fix For: 0.4.0
>         Attachments: hive.518.1.patch, hive.518.2.patch
> It would be good to have a test mode in hive - this will help in checking the validity
of a hive drop on a production cluster.
> The following would be good to have:
> Testmode --> In testmode, all input tables are sampled (if not already sampled) and
all output tables are prefixed by a user supplied name.
> This way, multiple hive drops can be compared quickly for correctness

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