Select person id from patient table

[DanPaseltiner]

PULL REQUEST

Summary

This PR makes a small modification to the base of the blocking query in the MPI. Currently we select person_id from the person table which requires that we do a JOIN between patient and person. However, since person_id is already included in patient as a foreign key we can simply select person_id from patient. Testing does not indicate that we will see a significant performance improvement from this change, but this is a simple change to make and eliminates a JOIN from our blocking query.

Related Issue

Fixes CDCgov/phdi-azure#323

Additional Information

Anything else the review team should know?

Checklist

• If this code affects the other scrum team, have they been notified? (In Slack, as reviewers, etc.)

[m-goggins]

🚀