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https://issues.apache.org/jira/browse/PIG-5085?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15813614#comment-15813614
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Rohini Palaniswamy commented on PIG-5085:
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Till now have been suggesting users to convert the map to a bag with a udf and
then FLATTEN it.
Below is a very short jython UDF example from
http://chase-seibert.github.io/blog/2013/02/10/pig-hbase-flatten-column-family.html
{code}
@outputSchema("values:bag{t:tuple(key, value)}")
def bag_of_tuples(map_dict):
return map_dict.items()
{code}
> Support FLATTEN of maps
> -----------------------
>
> Key: PIG-5085
> URL: https://issues.apache.org/jira/browse/PIG-5085
> Project: Pig
> Issue Type: New Feature
> Reporter: Rohini Palaniswamy
>
> I have come across users asking for this quite a few times. Don't see why
> we should not support it with FLATTEN instead of users having to write a UDF
> for that
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