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From "Alan Gates (JIRA)" <j...@apache.org>
Subject [jira] Resolved: (PIG-827) Redesign graph operations in OperatorPlan
Date Tue, 21 Sep 2010 21:21:33 GMT

     [ https://issues.apache.org/jira/browse/PIG-827?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Alan Gates resolved PIG-827.
----------------------------

    Resolution: Fixed

The new optimizer and plan structure introduced in 0.7 cover this.

> Redesign graph operations in OperatorPlan
> -----------------------------------------
>
>                 Key: PIG-827
>                 URL: https://issues.apache.org/jira/browse/PIG-827
>             Project: Pig
>          Issue Type: Improvement
>          Components: impl
>    Affects Versions: 0.3.0
>            Reporter: Santhosh Srinivasan
>
> The graph operations swap, insertBetween, pushBefore, etc. have to be re-implemented
in a layered fashion. The layering will facilitate the re-use of operations. In addition,
use of operator.rewire in the aforementioned operations requires transaction like ability
due to various pre-conditions. Often, the result of one of the operations leaves the graph
in an inconsistent state for the rewire operation. Clear layering and assignment of the ability
to rewire will remove these inconsistencies. For now, use of rewire has resulted in a slightly
less maintainable code along with the necessity to use rewire with discretion.

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