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https://issues.apache.org/jira/browse/PIG-5201?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16120468#comment-16120468
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Koji Noguchi commented on PIG-5201:
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[~daijy], as I wrote above, are you ok with FLATTEN(null-bag) not dropping ?
(e.g. if this bag has schema, then FLATTEN(null) be expanded to multiple nulls
to match the number of fields)
> Null handling on FLATTEN
> ------------------------
>
> Key: PIG-5201
> URL: https://issues.apache.org/jira/browse/PIG-5201
> Project: Pig
> Issue Type: Bug
> Reporter: Koji Noguchi
> Assignee: Koji Noguchi
> Priority: Minor
> Fix For: 0.18.0
>
> Attachments: pig-5201-v00-testonly.patch, pig-5201-v01.patch,
> pig-5201-v02.patch, pig-5201-v03.patch
>
>
> Sometimes, FLATTEN(null) or FLATTEN(bag-with-null) seem to produce incorrect
> results.
> Test code/script to follow.
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