After doing some work on compressed BSON Columns in SERVER-65804 and with PM-3055 coming soon, I know that having some tooling to help with debugging and testing would greatly aid development.

Reference material:

• Gregory W's Skunkworks project to dump BSONColumn:
  • SERVER-68153: Create shell helper to decompress BSONColumn
  • commit
• Technical Design of BSON Column Compression
  • https://docs.google.com/document/d/1B_8VLkWIHitnqZIRF9xIRyMaZI8rL6p_85OvZqYL4uQ/edit#heading=h.2s9zdv6a57gn
• BSON Column Spec / Blog Post
  • https://github.com/10gen/mongo/blob/henrikedin/bsoncolumn.spec/docs/subtype7.rst

• • https://docs.google.com/document/d/1abJkDgR-RDbf65mg0y1Sfy_UiE2BYtBHhesVrdF-31k/edit#