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Xuedong Luan

PROFILE

Xuedong Luan

Luan Xuedong contributed to the oap-project/velox and apache/incubator-gluten repositories by developing features that improved Spark SQL compatibility and backend reliability. He implemented the array_append function for Velox Spark SQL, enabling robust array manipulation with correct null handling, and enhanced get_json_object to support incomplete or malformed JSON, reducing parsing errors in production pipelines. Using C++ and SQL functions, Luan also addressed resource management in Spark by refining cache initialization logic and performed code refactoring to remove dead code, improving maintainability. His work demonstrated depth in distributed systems and backend development, focusing on stability, feature parity, and long-term code health.

Overall Statistics

Feature vs Bugs

75%Features

Repository Contributions

4Total
Bugs
1
Commits
4
Features
3
Lines of code
187
Activity Months3

Work History

April 2025

1 Commits • 1 Features

Apr 1, 2025

April 2025 monthly summary for oap-project/velox. Focused on strengthening Spark SQL compatibility by enabling incomplete/malformed JSON handling in get_json_object, aligning Velox and Spark behavior, and improving resilience for real-world JSON data. Implemented simdjsonParseIncomplete and activated SIMDJSON_EXPERIMENTAL_ALLOW_INCOMPLETE_JSON, with comprehensive tests for malformed JSON cases. This work reduces parsing errors in production data pipelines and positions Velox for broader Spark adoption.

February 2025

1 Commits • 1 Features

Feb 1, 2025

February 2025 monthly summary focusing on key accomplishments and business value for oap-project/velox. Delivered the Spark SQL array_append function for Velox Spark SQL, enabling appending a single element to arrays with correct null handling, including null input arrays. This enhancement strengthens Spark SQL integration, improves data transformation pipelines, and reduces the need for workaround logic in downstream processing. No other major bug fixes reported this month; work centered on feature delivery and repository quality improvement.

November 2024

2 Commits • 1 Features

Nov 1, 2024

November 2024 highlights focused on stability, maintainability, and cross-repo quality for gluten and velox projects. Delivered a targeted bug fix to improve Spark driver behavior in non-local mode and performed essential code cleanup to reduce future maintenance risk.

Activity

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Quality Metrics

Correctness95.0%
Maintainability95.0%
Architecture95.0%
Performance90.0%
AI Usage20.0%

Skills & Technologies

Programming Languages

C++CMakeJavaRSTScala

Technical Skills

Array ManipulationBackend DevelopmentBuild SystemsC++C++ DevelopmentCode RefactoringDistributed SystemsDocumentationHeader File ManagementJSON ParsingSQL FunctionsSpark

Repositories Contributed To

2 repos

Overview of all repositories you've contributed to across your timeline

oap-project/velox

Nov 2024 Apr 2025
3 Months active

Languages Used

C++RSTCMake

Technical Skills

C++Code RefactoringHeader File ManagementArray ManipulationDocumentationSQL Functions

apache/incubator-gluten

Nov 2024 Nov 2024
1 Month active

Languages Used

JavaScala

Technical Skills

Backend DevelopmentDistributed SystemsSpark