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QA is happening as part of code review.

Indicator definitions: https://docs.google.com/a/dimagi.com/spreadsheets/d/1Ug09IcbogB9JyCIGS2vHV0kRTn2U_zO-Y9HRAinOpT0/edit#gid=1495052602

@emord @czue @esoergel 
doesn't setting the `chunksize` to `SIZE_LIMIT` remove the advantages of a chunked query?