The June 2018 preview release of Confluent Platform introduces several enhancements, including full support for Avro data in Control Center's topic inspection feature and the addition of feature access toggles within Confluent Control Center. Additionally, KSQL now supports complex nested data types with STRUCT data type, user-defined functions (UDFs), and user-defined aggregate functions (UDAFs). Furthermore, this release introduces Stream-Stream and Table-Table joins to cover all available join operations in Kafka Streams.