tanelpoder/tpt-postgres: Tanel Poder's Performance and Troubleshooting Tools for PostgreSQL · GitHub

More to see here soon, but for now, enjoy the Postgres pure-SQL QR code generation script pqr.sql under the demos directory.

Example usage:

psql -qf pqr.sql -v payload='Hello, World!'

More running instructions and blog entry here:

• https://tanelpoder.com/posts/generate-qr-code-with-pure-sql-in-postgres/