Polypheny

Polypheny-DB is an adaptive database system bridging the gap between polystores and HTAP systems. In contrast to most existing polystore systems, Polypheny-DB offers support for data manipulation queries. Furthermore, it features a flexible schema supporting schema changes at runtime. Polypheny-DB is a full database management system providing support for a rich set of data types. Due to its support for features like the enforcement of constraints, transactions, prepared statements, and batch queries, it even goes beyond of what many well-known DBMS provide.