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https://issues.apache.org/jira/browse/PIG-2673?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dmitriy V. Ryaboy updated PIG-2673:
-----------------------------------
Attachment: PIG-2673_0.patch
Attaching patch that relaxes the sanity checks and updates the documentation.
Note that while working on this patch I discovered we never enforced a stated
condition for the merge join, which is that you cannot call UDFs on the data
between a load and a merge join. This is also fixed in this patch. This fix may
break people's script in cases when they were using UDFs and unwittingly
violating the documented constraint.
> Allow Merge join to follow an ORDER statement
> ---------------------------------------------
>
> Key: PIG-2673
> URL: https://issues.apache.org/jira/browse/PIG-2673
> Project: Pig
> Issue Type: Improvement
> Reporter: Dmitriy V. Ryaboy
> Assignee: Dmitriy V. Ryaboy
> Attachments: PIG-2673_0.patch
>
>
> Currently, we insist that data for a merge join must come from an
> OrderedLoadFunc.
> We can relax this condition and allow explicit ordering operations to precede
> a MergeJoin.
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