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From "Daniel Dai (JIRA)" <j...@apache.org>
Subject [jira] Closed: (PIG-1174) Creation of output path should be done by storage function
Date Fri, 14 May 2010 06:55:51 GMT

     [ https://issues.apache.org/jira/browse/PIG-1174?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Daniel Dai closed PIG-1174.

> Creation of output path should be done by storage function
> ----------------------------------------------------------
>                 Key: PIG-1174
>                 URL: https://issues.apache.org/jira/browse/PIG-1174
>             Project: Pig
>          Issue Type: Bug
>            Reporter: Bill Graham
>             Fix For: 0.7.0
> When executing a STORE command, Pig creates the output location before the storage function
gets called. This causes problems with storage functions that have logic to determine the
output location. See this thread:
> http://www.mail-archive.com/pig-user%40hadoop.apache.org/msg01538.html
> For example, when making a request like this:
> STORE A INTO '/my/home/output' USING MultiStorage('/my/home/output','0', 'none', '\t');
> Pig creates a file '/my/home/output' and then an exception is thrown when MultiStorage
tries to make a directory under '/my/home/output'. The workaround is to instead specify a
dummy location as the first path like so:
> STORE A INTO '/my/home/output/temp' USING MultiStorage('/my/home/output','0', 'none',
> Two changes should be made:
> 1. The path specified in the INTO clause should be available to the storage function
so it doesn't need to be duplicated.
> 2. The creation of the output paths should be delegated to the storage function.

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