MultiQuery optimization throws error for multi-level splits

                 Key: PIG-1060
             Project: Pig
          Issue Type: Bug
    Affects Versions: 0.5.0
            Reporter: Ankur

Consider the following scenario :-
1. Multi-level splits in the map plan.
2. Each split branch further progressing across a local-global rearrange.
3. Output of each of these finally merged via a UNION.

MultiQuery optimizer throws the following error in such a case:
"ERROR 2146: Internal Error. Inconsistency in key index found during 

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