Dynamic User-Defined Aggregation in Data Stream Management

The patent implements a universal aggregation operator that can handle both built-in aggregations (SUM, COUNT, AVG) and user-defined aggregations through a common interface and execution mechanism. The operator is designed to be multi-functional, accepting different aggregation types without requiring separate dedicated operators for each type, thereby extending adaptability while controlling complexity through code reuse and standardized processing paths.

The patent implements dynamic query plan acceptance by allowing the DSMS to receive and compile new continuous queries during normal operation. The system dynamically creates and integrates new query plans into the existing execution framework, enabling adaptability to new user-defined aggregations while maintaining stability through structured plan management and incremental integration of new query components into the running system.

The patent employs a universal aggregation operator that can process multiple aggregation types including built-in functions and user-defined aggregations through a single unified interface. This multi-functional operator design ensures reliability and correctness through consistent processing logic while reducing device complexity by eliminating the need to create separate dedicated operators for each aggregation type, thereby reusing the same operator infrastructure across different aggregation scenarios.

The patent implements self-service capabilities that allow users to define and register their own aggregation functions during normal system operation without requiring complex administrative intervention. The system provides automated mechanisms for validating user-defined aggregations, integrating them into the query processing framework, and managing their lifecycle, thereby improving adaptability while maintaining ease of operation through automated onboarding and management of custom aggregation functions.