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From "Santhosh Srinivasan (JIRA)" <j...@apache.org>
Subject [jira] Commented: (PIG-158) Rework logical plan
Date Fri, 18 Apr 2008 06:33:21 GMT

    [ https://issues.apache.org/jira/browse/PIG-158?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12590302#action_12590302

Santhosh Srinivasan commented on PIG-158:

I am trying to implement POUserFunc to provide a wrapper for any UDF. I wanted to be able
to instantiate the UDF using information obtained from the logical operator LOUserFunc. The
information I need was name of the function and the arguments in the following form;

String funcSpec = FunctionName + "(" + Args + ")"

This is similar to what we have in the existing pig. I can use the funcSpec to then instantiate
the UDF using existing code in PigContext.

[Santhosh] During parsing, funcSpec is constructed as per the specification that you have

> Rework logical plan
> -------------------
>                 Key: PIG-158
>                 URL: https://issues.apache.org/jira/browse/PIG-158
>             Project: Pig
>          Issue Type: Sub-task
>          Components: impl
>            Reporter: Alan Gates
>            Assignee: Alan Gates
>         Attachments: logical_operators.patch, logical_operators_rev_1.patch, logical_operators_rev_2.patch,
logical_operators_rev_3.patch, visitorWalker.patch
> Rework the logical plan in line with http://wiki.apache.org/pig/PigExecutionModel

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