Explain output sometimes may not match the exact plan that is executed in terms
of the order in which inner plans and operators are presented - (semantically
the plans are the same)
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Key: PIG-848
URL: https://issues.apache.org/jira/browse/PIG-848
Project: Pig
Issue Type: Improvement
Affects Versions: 0.2.1
Reporter: Pradeep Kamath
The visitors used for explain and in MRCompiler do not guarantee order - hence
the plan shown in explain output may not match the plan that is finally
executed. This is not a bug but makes debugging harder. If the plan that is
executed is different from the one in explain, it would still be the same in
terms of semantics - the difference would only be in the order of inner plans
and operators. It would be nice if we could have an order preserving way of
showing explain output which would also be used to construct the plan (MRPlan)
which is finally executed.
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