Dynamic Match Rule Generation for Materialized View Query Rewriting
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Solution Overview
Problem
The increasing complexity and cost of managing and storing large amounts of data in database systems are exacerbated by high computational and storage access workloads, necessitating techniques to reduce complexity and improve data processing efficiency.
Innovation Solution
The dynamic generation of match rules for rewriting queries to utilize materialized views, allowing for the automatic identification and application of existing materialized views to reduce computational load and enhance query performance, even for new or unseen queries, by dynamically tailoring rules to match query patterns and updating capabilities as new materialized views are created.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If materialized views are used to reduce computational load, then query performance is improved, but the complexity of managing and storing data increases
Solution Approach 1:
The system automatically generates match rules and rewrites queries to use materialized views without requiring manual configuration or client application specification. The database system self-manages the complexity of matching queries to materialized views through automated rule generation and evaluation, resolving the contradiction by making the system self-sufficient in handling the management complexity.
Solution Approach 2:
Match rules are generated in advance when materialized views are created, storing the mapping logic between queries and materialized views. This preliminary action allows the system to quickly determine whether a query can be served by an existing materialized view without performing complex analysis at query execution time, thus improving query performance while managing complexity through pre-computation.
2Productivity
If manual specification of materialized views is required, then query performance can be optimized, but ease of operation decreases
Solution Approach 1:
The database system automatically generates match rules and performs query rewriting without requiring client applications to manually specify materialized views. The system self-manages the entire process of matching queries to materialized views through automated rule generation and evaluation, eliminating the need for manual configuration while maintaining query performance optimization.
Solution Approach 2:
Match rules act as an intermediary between client queries and materialized views. Instead of requiring direct manual specification by clients, the match rules automatically bridge the gap by evaluating whether queries can be served by existing materialized views and performing the necessary rewriting, thus maintaining ease of operation while achieving performance optimization.
3Adaptability or versatility
If dynamic rule generation is implemented, then adaptability to new materialized views is improved, but device complexity increases
Solution Approach 1:
The system dynamically generates match rules when materialized views are created, allowing automatic adaptation to new materialized views without manual intervention. The match rule generation process is triggered automatically upon materialized view creation, ensuring the system remains adaptable to changing data structures while managing complexity through event-driven automation rather than static configuration.
Solution Approach 2:
The system establishes a feedback loop where the creation of new materialized views automatically triggers the generation of corresponding match rules. This feedback mechanism ensures that the system continuously adapts to new materialized views by using the creation event as input to generate the necessary matching logic, maintaining adaptability while managing complexity through automated feedback-driven updates.
Data Source
AI summary
Match rules for rewriting queries to use materialized views may be dynamically generated by a database system. A database system may generate rules that indicate whether a given query can use a materialized view and how to rewrite the given query to use the materialized view. A query may be received and the rules may be applied to the query to determine that the query can use the materialized view and to rewrite the query to use the materialized view. The rewritten query can then be executed.