Synopsis Look up critical information quickly as you use the project. The SQL language Learn the make-up of the SQL language to write programs. Read → Built-in functions Invoke built-in functions shipped with ksqlDB. Read → Operators Call operators built-into the language. Read → Server configuration Control how ksqlDB server behaves. Read → Metrics Observe how your cluster is behaving over time. Read → User-defined functions Extend ksqlDB to invoke custom code written in Java. Read → Processing log Log internal events that arise when processing rows. Read → Serialization Control the format of how data is read and written. Read → Clients Talk to ksqlDB using your favorite programming language. Read → REST API Communicate with ksqlDB over an HTTP REST API. Read → Appendix Quickly reference the elements of the language. Read → Last update: 2022-04-13