Initial commit

commands/audit-log.md

@@ -0,0 +1,42 @@
+---
+description: Implement database audit logging
+---
+
+# Database Audit Logger
+
+Track database changes for compliance and debugging.
+
+## Audit Strategies
+
+1. **Trigger-Based**: Database triggers on INSERT/UPDATE/DELETE
+2. **Application-Level**: Log in application code
+3. **CDC (Change Data Capture)**: Stream changes
+4. **Database Logs**: Parse database transaction logs
+
+## Audit Table Template
+
+```sql
+CREATE TABLE audit_log (
+  id SERIAL PRIMARY KEY,
+  table_name VARCHAR(100) NOT NULL,
+  operation VARCHAR(10) NOT NULL,
+  old_data JSONB,
+  new_data JSONB,
+  user_id INTEGER,
+  timestamp TIMESTAMP DEFAULT CURRENT_TIMESTAMP
+);
+
+-- Trigger example
+CREATE OR REPLACE FUNCTION audit_trigger()
+RETURNS TRIGGER AS $$
+BEGIN
+  INSERT INTO audit_log (table_name, operation, old_data, new_data)
+  VALUES (TG_TABLE_NAME, TG_OP, row_to_json(OLD), row_to_json(NEW));
+  RETURN NEW;
+END;
+$$ LANGUAGE plpgsql;
+```
+
+## When Invoked
+
+Generate audit logging implementation for compliance tracking.