Parameterized Query Template for Complex Event Processing
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Solution Overview
Problem
Complex Event Processing (CEP) systems face challenges in managing hundreds of queries and views that differ only by small parameters, leading to complexity and inefficiency in maintaining and updating these queries and views.
Innovation Solution
The implementation of parameterized queries using bind variables in CEP systems, where placeholders are substituted with sets of parameters, allowing for dynamic generation of multiple queries from a single template, and enabling easy management and modification of queries and views.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If hundreds of queries and views are maintained separately in CEP systems, then each query can be customized with specific parameters, but the complexity of maintaining and updating these queries increases significantly
Solution Approach 1:
The patent applies universality by creating a single query template that can serve multiple purposes with different parameter bindings. Instead of maintaining hundreds of separate queries, one universal template with parameter placeholders can generate all necessary queries by substituting different parameter sets, thereby reducing management complexity while preserving customization capability
Solution Approach 2:
The patent utilizes parameter changes by introducing bind variables as placeholders that can be dynamically bound to different values. This allows the same query template to adapt to various scenarios by changing only the parameter bindings rather than modifying the entire query structure, enabling efficient query generation and management
2Ease of operation
If a small change is made in base query or view, then the query can be updated, but hundreds of dependent queries and views are affected requiring widespread modifications
Solution Approach 1:
The patent merges hundreds of similar queries into a single parameterized template. When a change is needed in the base query, only the template needs to be modified, and all dependent queries automatically inherit the change through parameter substitution, eliminating the need to propagate changes across hundreds of individual queries
Solution Approach 2:
By creating a universal query template that serves as the single source of truth, any modification to the template automatically applies to all generated queries. This universal approach ensures consistency and eliminates the time-consuming process of manually updating each dependent query
3Productivity
If parameterized queries with bind variables are used, then a single template can generate multiple queries, but type checking and validation become more complex
Solution Approach 1:
The patent implements self-service by allowing the CEP engine to automatically handle type checking and validation of bind variables at runtime. Instead of requiring explicit type declarations in the query template, the system self-validates the types when parameters are bound, simplifying the template syntax while maintaining type safety through automated validation
Data Source
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AI summary
The present invention includes a method for providing parameterized queries in complex event processing (CEP). The method includes providing a query template which includes one or more bind variables, providing sets of parameters corresponding to the one or more bind variables, and parsing the query template to determine positions of the one or more bind variables. The method further includes scanning the provided sets of parameters to determine which of the sets of parameters are to be bound to the one or more bind variables, binding the one or more bind variables which are determined to be bound to the sets of parameters, and substituting the bound one or more bind variables with the corresponding sets of parameters. The method further includes injecting all incarnations of the parameterized queries into the system, and one template/parameterized query is configured to run them all.