Igor Suhorukov: Vectorized Query Execution in PostgreSQL 19: Arrow, ORCA and Flight SQL in a PostgreSQL Extension

Last week I ported Apache Cloudberry to PostgreSQL 19 as a set of extensions and described where the port falls behind the original fork. On ClickBench, columnar engines beat it by an order of magnitude. The culprit isn’t the MPP implementation but PostgreSQL’s executor, which works on rows. Each row travels up the node tree on its own, every value…