[jira] Updated: (PIG-1127) Logical operator should contains individual copy of schema object

["Daniel Dai (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/PIG-1127?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Daniel Dai updated PIG-1127:
----------------------------

    Attachment: PIG-1127-1.patch

> Logical operator should contains individual copy of schema object
> -----------------------------------------------------------------
>
>                 Key: PIG-1127
>                 URL: https://issues.apache.org/jira/browse/PIG-1127
>             Project: Pig
>          Issue Type: Bug
>    Affects Versions: 0.4.0
>            Reporter: Daniel Dai
>            Assignee: Daniel Dai
>             Fix For: 0.6.0
>
>         Attachments: PIG-1127-1.patch
>
>
> Currently some logical operator only contains a schema reference to the predecessor's schema object. These logical operators include: LOSplitOutput, LOLimit, LOSplit, LOFilter, LOSort, LODistinct, LOUnion. It is ok in the before because we do not change schema object once it is set. Now with the column pruner (PIG-922), we need to change individual schema object so it is no longer acceptable. For example, the following script fail:
> {code}
> a = load '1.txt' as (a0, a1:map[], a2);
> b = foreach a generate a1;
> c = limit b 10;
> dump c;
> {code}
> We need to fix it.

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