esProc SPL is an open-source and JVM-based analyzing and computing engine for structured and semi-structured data. It can be used independently or embedded in applications and is mainly applied in scenarios such as replacing data warehouse, serving as middleware for data-driven micro-service, simplifying report calculation, mixed computing in real time, and computation on files. It provides a simple and easy-to-use development environment with complete debugging functions and has built-in rich data computing library. It supports diverse data sources and provides its own efficient data file storage. It also supports more application scenarios such as data-driven micro-service, eliminating intermediate tables from databases, and performing computation on files to implement Lakehouse.