Compiler-Generated Anonymous Types for Query Result Shaping
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Solution Overview
Problem
Current technologies require human intervention and explicit type definitions for querying unstructured data, making it inconvenient to create separate types for each query result, especially as the number of queries grows, and do not support the use of anonymous types which could simplify the process.
Innovation Solution
The introduction of anonymous types, which are compiler-generated types that can be used within a method without a name, allowing for type inference and conversion to nominal types, enabling the creation of structured data without explicit type definitions, particularly useful in Select queries.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If explicit type definitions are used for query results, then type safety and structure are ensured, but the complexity and time required to create and maintain separate types for each query increases
Solution Approach 1:
The compiler automatically generates anonymous types with appropriate structure and type safety without requiring manual intervention. The type system serves itself by inferring types from query expressions and generating the necessary type definitions automatically, eliminating the need for developers to manually create and maintain type definitions for each query result.
Solution Approach 2:
The compiler performs preliminary type generation before the query execution, creating anonymous types in advance based on the query expression structure. This preliminary action ensures type safety is established upfront while avoiding the complexity of manual type definition during query development.
2Measurement precision
If separate types are created for each query result, then type specificity is improved, but the development time and maintenance effort increase significantly
Solution Approach 1:
The compiler automatically generates specific anonymous types with precise structure matching the query results without requiring manual type creation. This self-service approach maintains high type specificity while eliminating the time-consuming process of manually defining each query result type.
Solution Approach 2:
Anonymous types are generated on-demand for each query and are scoped locally, allowing the system to create highly specific types without the long-term maintenance burden. These compiler-generated types serve their purpose immediately and can be discarded, reducing overall development and maintenance time.
3Ease of manufacture
If anonymous types are used in Select queries, then the need for explicit type definitions is reduced, but support for anonymous types in the type system must be added
Solution Approach 1:
The compiler extends the type system automatically to support anonymous types generated from Select queries. This self-service extension adds the necessary type support without requiring manual modification of the type system, making query creation easier while managing the complexity automatically.
Solution Approach 2:
The anonymous type mechanism is designed to work universally across different Select query scenarios, providing a single solution that handles various query result structures. This multi-functional approach simplifies query creation across different contexts while the compiler manages the underlying type system complexity uniformly.
Data Source
AI summary
Anonymous types for a programming language. Non-denotable anonymous types are types that a compiler generates on behalf of a programmer and can then be used as nominal types. Insofar as anonymous types do not have a name, they can be used only inside a method in which they are created. Additionally, an anonymous type cannot be exposed in any way outside of the method. Syntax to create an anonymous type is useful when employed with a Select operator to generate a result with a particular shape, without the need of having a regular type for it. Anonymous types are expressible such that an expression of that type can be written. Translation of an anonymous type by a compiler generates a nominal class that implements Equals and GetHashCode methods. There is equivalence of anonymous types within the same method, and conversion of an unrealized structural type into structurally compatible nominal type.