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https://issues.apache.org/jira/browse/PIG-1536?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Daniel Dai updated PIG-1536:
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Attachment: PIG-1536-3.patch
PIG-1536-3.patch resync with trunk.
> use same logic for merging inner schemas in "default union" and "union
> onschema"
> --------------------------------------------------------------------------------
>
> Key: PIG-1536
> URL: https://issues.apache.org/jira/browse/PIG-1536
> Project: Pig
> Issue Type: Task
> Reporter: Thejas M Nair
> Assignee: Daniel Dai
> Fix For: 0.9.0
>
> Attachments: PIG-1536-1.patch, PIG-1536-2.patch, PIG-1536-3.patch
>
>
> We should consider using logic for merging inner schema in case of the two
> different types of union.
> In case of 'default union', it merges the two inner schema of bags/tuples by
> position if the number of fields are same and the corresponding types are
> compatible.
> In case of 'union onschema', it considers tuple/bag with different
> innerschema to be incompatible types.
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