The Future of Database Observability is Open: SQL Commenter Merges W...
summary
Google donates and merges SQL Commenter into OpenTelemetry to create a vendor‑neutral way to push application context into databases; it augments SQL with serialized key/value comments (demo uses Django middleware) so logs and Cloud SQL Insights show controller, route and traceparent for slow queries. Specification requires comment must come after SQL and preserve existing comments and key=value URL-encoded, comma-separated, lexicographically sorted. Libraries exist for Python, Java, Node.js, Ruby; tested on Postgres, MySQL, MariaDB, SQLite and Cloud SQL.
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