Amazon Aurora PostgreSQL-Compatible Edition now supports PostgreSQL major version 15 (15.2). New features in PostgreSQL 15 include the SQL standard “MERGE” command for conditional SQL queries, performance improvements for both in-memory and disk-based sorting, and support for two-phase commit and row/column filtering for logical replication. Please refer to the PostgreSQL community announcement for more details about the release. This release includes new features for Babelfish for Aurora PostgreSQL version 3.1 such as Kerberos support with Active Directory and support for Linked Servers. Please refer to Amazon Aurora PostgreSQL updates for more information.
Source:: Amazon AWS