Oiyokan is an OData v4 server (provider) SDK for RDB. You can use Oiyokan to turn RDBMS into OData v4 services using JDBC driver. Based on Apache Olingo / h2 database.

Oiyokan Initializr is a low code tool that quickly publish database tables as a REST API server. Generate Spring Boot web based REST API Server (OData v4) with minimal text input and mouse ops. Knowledge of Spring Boot, Maven, and JDBC settings is recommended.