Announcing ksqlDB 0.14.0

ksqlDB 0.14 introduces several key enhancements, including expanded query support for materialized views, allowing for multiple key lookups in pull queries using the IN predicate. The release also simplifies schema alterations for streams and tables with the new ALTER syntax, which permits adding columns without requiring the full schema to be redefined, though it is limited to those created with DDL statements. Additionally, the update introduces SQL variable substitution for flexible environment testing and supports new key formats like DELIMITED and JSON, alongside the existing KAFKA format, with future plans for more complex key types. These improvements aim to enhance the functionality and usability of ksqlDB, encouraging users to explore the standalone distribution or Confluent Cloud options and engage with the community for further support and development.