ksqlDB for Confluent Platform Reference

This reference covers SQL syntax, built-in functions, operators, and server configuration for building and operating ksqlDB applications.

• Syntax and Lexical Structure: Learn the make-up of the SQL language to write programs.

• Built-in functions: Invoke built-in functions shipped with ksqlDB.

• Operators: Call operators that are built in to the language.

• Server Configuration: Control how ksqlDB server behaves.

• Metrics: Observe how your cluster is behaving over time.

• User-defined Functions: Extend ksqlDB to invoke custom code written in Java.

• Processing Log: Log internal events that arise when processing rows.

• Serialization Formats: Control the format of how data is read and written.

• Java Client: Talk to ksqlDB using Java.

• REST API: Communicate with ksqlDB over an HTTP REST API.

• Quick Reference: Quickly reference the elements of the language.