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From "Daniel Dai (JIRA)" <j...@apache.org>
Subject [jira] Updated: (PIG-1719) New logical plan: FieldSchema generation for BinCond is wrong
Date Thu, 18 Nov 2010 00:07:15 GMT

     [ https://issues.apache.org/jira/browse/PIG-1719?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Daniel Dai updated PIG-1719:
----------------------------

    Attachment: PIG-1719-1.patch

> New logical plan: FieldSchema generation for BinCond is wrong
> -------------------------------------------------------------
>
>                 Key: PIG-1719
>                 URL: https://issues.apache.org/jira/browse/PIG-1719
>             Project: Pig
>          Issue Type: Bug
>          Components: impl
>    Affects Versions: 0.8.0
>            Reporter: Daniel Dai
>            Assignee: Daniel Dai
>             Fix For: 0.8.0
>
>         Attachments: PIG-1719-0.patch, PIG-1719-1.patch
>
>
> New logical plan generate incomplete schema for BinCond, if the expression for BinCond
is of complex type. Eg,
> {code}
> a = load '1.txt' as (a0, a1:int);
> b = group a by a0;
> c = foreach b generate FLATTEN((IsEmpty(a)?{(65535)}:sequence.FIRST(a.a1)));
> {code}
> The right schema for c is (int), however, in current code, we get null schema. This is
because BinCond should get the schema {(int)}, but we get empty bag {}.

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