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From "Vikram Dixit K (JIRA)" <>
Subject [jira] [Commented] (HIVE-4165) Union failures with mapjoin hints
Date Mon, 06 May 2013 17:26:15 GMT


Vikram Dixit K commented on HIVE-4165:

[~namit] Could you please explain why union operator was explicitly not allowed before or
after map join? This above change was introduced as part of the change converting joins to
mapjoins automatically without need for hints.

> Union failures with mapjoin hints
> ---------------------------------
>                 Key: HIVE-4165
>                 URL:
>             Project: Hive
>          Issue Type: Bug
>          Components: Query Processor
>    Affects Versions: 0.11.0
>            Reporter: Vikram Dixit K
> While running the unit tests - union_remove_12.q which has mapjoin hints fails. Although
this is a hadoop 23 only test, the same is reproducible on any union test with mapjoin hints.
For e.g. union_22.q regardless of if we have the auto.convert.join=true/false, I see that
we fail.

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