RegreSQL: Regression Testing for PostgreSQL Queries
9 days ago
- #SQL Testing
- #PostgreSQL
- #Performance Optimization
- RegreSQL brings PostgreSQL's regression testing methodology to application queries, catching correctness bugs and performance regressions before production.
- SQL queries are often treated as 'just glue code' and not systematically tested, leading to production issues.
- RegreSQL, originally created for 'The Art of PostgreSQL', applies PostgreSQL's regression testing framework to application queries.
- The tool validates SQL queries against expected results, tracks performance baselines, and detects common query plan regressions.
- RegreSQL supports both positional arguments and psql-style variables in SQL queries.
- Performance regression testing in RegreSQL detects issues like sequential scans and nested loop joins, suggesting optimizations.
- Test data management in RegreSQL uses YAML files for declarative, reproducible, and scalable data generation.
- RegreSQL can intercept ORM-generated SQL to catch performance issues before they hit production.
- The fixture system in RegreSQL allows for stackable and dependency-aware test data setup.
- Future plans for RegreSQL include better documentation, tutorials, and integration with SQL Labs.