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https://issues.apache.org/jira/browse/PIG-356?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13007060#comment-13007060
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Xuefu Zhang commented on PIG-356:
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Empty string as a map key is valid key in java, so why should we disallow then?
> map lookup on empty key should be disallowed at parse time
> ----------------------------------------------------------
>
> Key: PIG-356
> URL: https://issues.apache.org/jira/browse/PIG-356
> Project: Pig
> Issue Type: Bug
> Affects Versions: 0.2.0
> Reporter: Pradeep Kamath
> Assignee: Xuefu Zhang
> Priority: Minor
> Fix For: 0.9.0
>
>
> Currently the following is allowed:
> {code}
> a = load 'testfile';
> b = foreach a generate $0#'apple', $0#'mango', $0#'', flatten($1#'orange');
> {code}
> Looking up an empty key ($0#'') should not be allowed at parse time
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