Source Code Annotations for Parallel User-Defined Function Partitioning
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Solution Overview
Problem
Current computing systems face challenges in optimizing the execution of user-defined functions within large data sets due to the lack of known pre-conditions, post-conditions, and behavior, which hinders efficient parallel processing.
Innovation Solution
The implementation of source code annotations that specify properties such as partition arrangements, grouping, ordering, and runtime characteristics for user-defined functions, allowing the optimizer to generate optimized query execution plans that leverage these properties for parallel execution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If user-defined functions are executed without annotations specifying partition arrangements, then the system maintains simplicity in function definition, but parallel execution efficiency deteriorates due to lack of optimization information
Solution Approach 1:
The patent applies preliminary action by requiring developers to specify partition arrangement properties (such as partitioning strategies, grouping requirements, and ordering constraints) in annotations during the function definition phase. This advance specification enables the query optimizer to generate optimized execution plans that leverage these pre-defined properties for efficient parallel execution, resolving the contradiction between definition simplicity and execution efficiency.
2Productivity
If the system implements comprehensive annotations for user-defined functions, then parallel execution efficiency improves through optimized query plans, but device complexity increases due to additional annotation requirements
Solution Approach 1:
The patent implements universality by designing a multi-functional annotation system where a single annotation mechanism serves multiple purposes: specifying partition arrangements, indicating grouping requirements, defining ordering constraints, and providing runtime characteristics. This unified approach improves parallel execution efficiency while managing system complexity through a consolidated annotation framework rather than separate mechanisms for each property.
3Manufacturing precision
If annotations specify detailed partition arrangements for user-defined functions, then query execution plan optimization improves, but the difficulty of detecting and measuring function properties increases
Solution Approach 1:
The patent applies the intermediary principle by introducing annotations as a mediating layer between the user-defined function and the query optimizer. These annotations serve as structured intermediaries that translate developer intent regarding partition arrangements, grouping, and ordering into a formal representation that the optimizer can process. This intermediary mechanism improves execution plan precision while managing the complexity of property specification through a standardized interface.
Data Source
AI summary
Annotations can be placed in source code to indicate properties for user-defined functions. A wide variety of properties can be implemented to provide information that can be leveraged when constructing a query execution plan for the user-defined function and associated core database relational operations. A flexible range of permitted partition arrangements can be specified via the annotations. Other supported properties include expected sorting and grouping arrangements, ensured post-conditions, and behavior of the user-defined function.