DistSQL（Distributed SQL）is Apache ShardingSphere specific SQL, which provide added-on operation capability beside standard SQL.
When using ShardingSphere-Proxy, developers can operate data just like using database, but they need to configure resources and rules through YAML file (or registry center). However, the format of YAML and habits changed by using registry center are not friendly to DBA.
DistSQL enables users to operate Apache ShardingSphere like a database, transforming it from a framework and middleware for developers to a database product for DBAs.
DistSQL is divided into RDL, RQL and RAL.
It is the design goal of DistSQL to break the boundary between middleware and database and let developers use Apache ShardingSphere just like database.
DistSQL can use for ShardingSphere-Proxy only, not for ShardingSphere-JDBC now.