projectcypress/health-data-standards — pull request #136 by eedrummer (2014-04-17 17:44:14+00:00)
Title: Measure prefilter

This adds functionality to the Measure model so that it can create a MongoDB query that will act as a prefilter to the CQM map reduce jobs. Initially it works by building filters based on IPP birth date restrictions. It provides a significant performance boost because you can often skip passing a large portion of the records in the database to the map reduce job.