In this Lightning talk, we introduce a ScalarDB approach for achieving HTAP in polystores. Polystores have gained much interest in the database community because of an increasing need for combining a variety of special-purpose databases, modernizing system architecture (e.g., employing a microservice architecture [1, 2]), and dealing with siloed databases in enterprises As one of the approaches to realizing polystores from a transactional perspective, we have been developing and providing a product called ScalarDB [5]. ScalarDB achieves distributed transactions across multiple disparate databases. Specifically, ScalarDB provides a databaseagnostic transaction manager on top of its database abstraction; thus, it achieves transactions spanning multiple disparate databases without depending on the transactional capability of underlying databases. Although ScalarDB was started as a universal transaction manager, it has evolved as a universal HTAP engine, running complex analytical workloads on the databases with which ScalarDB interacts while providing transactional capability.
1. Introduction abstraction mechanisms to seamlessly integrate such distributed query engines with ScalarDBmanaged databases.