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From "Prasad Chakka (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HIVE-405) Operators should pass ObjectInspector in init instead of forward
Date Tue, 14 Jul 2009 02:00:14 GMT

     [ https://issues.apache.org/jira/browse/HIVE-405?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Prasad Chakka updated HIVE-405:
-------------------------------

    Attachment: hive-405.patch

> Operators should pass ObjectInspector in init instead of forward
> ----------------------------------------------------------------
>
>                 Key: HIVE-405
>                 URL: https://issues.apache.org/jira/browse/HIVE-405
>             Project: Hadoop Hive
>          Issue Type: Bug
>          Components: Query Processor
>    Affects Versions: 0.4.0
>            Reporter: Zheng Shao
>            Assignee: Zheng Shao
>            Priority: Critical
>         Attachments: hive-405.patch
>
>
> We are always passing the same ObjectInspector, so there is no need to pass it again
and again in forward.
> Also there is a problem that can ONLY be fixed by passing ObjectInspector in init: Outer
Joins - Outer Joins may not be able to get ObjectInspectors for all inputs, as a result, there
is no way to construct an output ObjectInspector based on the inputs. Currently we have hard-coded
code that assumes joins are always outputting Strings, which did break but was hidden by the
old framework (because we do toString() when serializing the output, and toString() is defined
for all Java Classes).

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