Fix Version/s: None
DM-3472 lands, it will be possible to write an image selection task that uses the SQLite 3 database produced by IndexExposureTask (from daf_ingest) to search for exposures overlapping a region (in particular, the spatial extent of a coadd patch). The _rtree_search method in test_index_exposure.py (also from daf_ingest) has an example of how to perform spatial queries quickly.
I was originally scheduled to do something in this space, but Paul mentioned that he had plans to refactor the image selection tasks already, and is much more familiar with the pipeline side of things than I am. Therefore, I'm handing off the implementation of the pipeline task mentioned in
DM-3472 to him.