Postgresql Jdbc Driver Today

Test environment: PostgreSQL 14, localhost, Java 17, default settings.

Database Connectivity Working Group Next review date: Upon major PostgreSQL or JDBC specification release. postgresql jdbc driver

catch (SQLException e) System.out.println(e.getMessage()); Test environment: PostgreSQL 14, localhost, Java 17, default

| Issue | Symptom | Solution | |-------|---------|----------| | Not closing resources | "Too many clients" | Try-with-resources: try (Connection c = ...; Statement s = ...) ... | | Default fetch size 0 | OutOfMemoryError | setFetchSize(500) for large queries. | | Auto-commit on | Poor batch performance | Disable auto-commit before batch: conn.setAutoCommit(false) | | Using Statement for parameters | SQL injection | Use PreparedStatement exclusively. | | Server-prepared statement overhead | Slow first 5 executions | Lower prepareThreshold to 1 or 2. | Test environment: PostgreSQL 14

Class.forName("org.postgresql.Driver");