🔗 Using database comments to track columns with sensitive data

Recently, I was exploring a Rails application when I noticed that the developers had marked database columns as having sensitive data via a table's column definition. Various databases support comments for columns, but here's MySQL's explanation of a column comment:

A comment for a column can be specified with the COMMENT option, up to 1024 characters long. The comment is displayed by the SHOW CREATE TABLE and SHOW FULL COLUMNS statements. It is also shown in the COLUMN_COMMENT column of the Information Schema COLUMNS table.