My question is about using Pig to update ES.  If my index has _source 
disabled (I only wish to count the number of documents matching a query), 
how does one reindex a document? 
Here's how I plan on using pig and elastic search:

Use ES-pig to initially create an index of 10,000,000 documents. No _source.
1 Week later, index or reindex 10,000,000 documents, where maybe 95% of the 
docs are overlap with the original set.

Is this possible with _source disabled?  In normal operations update/upsert 
operations are not possible without _source, presumably this extends to the 
elasticsearch-hadoop bridges.

T.

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