Database Proxy SQL Rewriting for Multi-DBMS Compatibility
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Solution Overview
Problem
System management solutions are often tied to specific database management systems (DBMS) due to non-standard SQL extensions, making it difficult to switch between different DBMS without modifying application code.
Innovation Solution
A database proxy system that rewrites SQL commands from one DBMS to another, using rules to convert non-standard SQL language into a format compatible with a different DBMS, allowing system management solutions to support multiple DBMS without modifying existing code.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If non-standard SQL extensions are used by the system management solution, then the solution can utilize specific DBMS features and functionality, but the system management solution becomes tied to a specific DBMS and requires code rewriting to change DBMS
Solution Approach 1:
The patent introduces a database proxy as an intermediary component between the system management solution and the DBMS. The proxy intercepts SQL commands from the application, rewrites non-standard SQL extensions into standard SQL or alternative syntax, and forwards them to the target DBMS. This mediator approach allows the application to maintain its original code while achieving compatibility with different DBMS systems, resolving the contradiction between DBMS versatility and code complexity.
2Adaptability or versatility
If the application code is rewritten to support a different DBMS, then the system can switch between DBMS systems, but the task becomes very difficult and time-consuming
Solution Approach 1:
The patent implements preliminary action by pre-configuring rewriting rules in the database proxy that map non-standard SQL extensions to equivalent standard SQL syntax or alternative DBMS-specific syntax. These rules are established in advance, allowing the system to automatically handle DBMS transitions without requiring actual code modifications. When switching DBMS, the proxy simply applies different pre-configured rule sets, dramatically reducing migration time and effort.
3Adaptability or versatility
If standard SQL is used instead of non-standard extensions, then the system can work with multiple DBMS, but the specific functionality and features of individual DBMS cannot be utilized
Solution Approach 1:
The patent applies local quality by allowing different parts of the SQL command to be rewritten differently based on the target DBMS requirements. The database proxy analyzes the incoming SQL statement, identifies non-standard extensions, and applies specific rewriting rules tailored to the target DBMS's capabilities and syntax. This enables the system to maintain portability through standard SQL while preserving access to specific DBMS functionalities through targeted syntax transformations.
Data Source
AI summary
The database command rewriting system rewrites a first database command that includes language specific for a first database management system command into a second database command suitable for a second database management system. The database command rewriting system receives the first database command and identifies the specific language. Furthermore, the database command rewriting system retrieves a rule based on the identified language. Using the retrieved rule, the database command system rewrites the first database command to the second database command and transmits the second database command to the second database management system.