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From "Jesus Camacho Rodriguez (JIRA)" <>
Subject [jira] [Commented] (HIVE-14208) MapJoin uses key of outer input and Converter
Date Mon, 11 Jul 2016 18:55:11 GMT


Jesus Camacho Rodriguez commented on HIVE-14208:

Cc [~ashutoshc]

> MapJoin uses key of outer input and Converter
> ---------------------------------------------
>                 Key: HIVE-14208
>                 URL:
>             Project: Hive
>          Issue Type: Improvement
>          Components: Query Processor
>    Affects Versions: 2.2.0
>            Reporter: Jesus Camacho Rodriguez
>            Priority: Minor
> Consider an left outer MapJoin operator. OI for the outputs are created from outer and
inner side from their inputs. However, when there is a match in the join, the data for the
key is always taken from the outer side (as it is done currently). Thus, we need to apply
the Converter logic on the data to get the correct type.
> This issue is to explore whether a better solution would be to use the key from correct
inputs of the join to eliminate need of Converters.

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