nebulastream/nebulastream
Jun 2025 – Dec 2025
3 Months active
Languages Used
C++SQLPython
Technical Skills
ANTLRC++ DevelopmentCode RefactoringCompiler DesignCompiler DevelopmentConcurrency
Benjamin Greb
PROFILE
Benjamin Greb
Contributed to the nebulastream/nebulastream repository by developing and refining SQL execution features, enhancing runtime safety, and improving observability. Focused on robust union operation handling and type-safe system design using C++ and ANTLR, introducing a strongly typed PhysicalSourceId and optimizing pipeline management for better resource control and diagnostics. Upgraded the cpptrace library and aligned include paths to strengthen tracing instrumentation and build reliability. Consolidated error handling by integrating cpptrace-based stack traces, refactoring exception paths, and improving gRPC service robustness. These efforts resulted in more reliable builds, clearer logging, and streamlined debugging, demonstrating depth in compiler development and system programming.
Overall Statistics
Feature vs Bugs
67%Features
Repository Contributions
9Total
Bugs
2
Commits
9
Features
4
Lines of code
772
Activity Months3
Your Network
41 peopleShared Repositories
41
Adrian MichalkeMember
Afrasiyab KhaliliMember
aleppingMember
Benjamin GrebMember
Benedikt Maria BeckermannMember
tdietzel@beaverMember
Eric BenschneiderMember
Eric BenschneiderMember
fkuzunMember
Work History
December 2025
2 Commits • 1 Features
Dec 1, 2025December 2025 monthly summary for nebulastream/nebulastream. Key feature delivered: Error handling and logging improvements with cpptrace integration. Implemented a helper to format stack traces by filtering internal cpptrace frames, and refactored exception handling to utilize cpptrace for better error management and logging, including improved robustness of gRPC service methods. Commit references: fefdcdf2e88166500fec9b03451c40ab6e459a5e; 1dd1b88009f7bc3088f56353d6438a9d53015ebe.
2 Commits • 1 Features
Dec 1, 2025December 2025 monthly summary for nebulastream/nebulastream. Key feature delivered: Error handling and logging improvements with cpptrace integration. Implemented a helper to format stack traces by filtering internal cpptrace frames, and refactored exception handling to utilize cpptrace for better error management and logging, including improved robustness of gRPC service methods. Commit references: fefdcdf2e88166500fec9b03451c40ab6e459a5e; 1dd1b88009f7bc3088f56353d6438a9d53015ebe.
December 2025
October 2025
1 Commits • 1 Features
Oct 1, 2025October 2025: Focused on stabilizing observability integration by upgrading the CppTrace library and aligning include paths to improve compatibility and build reliability across the Nebulastream repository. The cpptrace upgrade to 1.0.4 and include-path fixes reduce build friction, enable more consistent tracing instrumentation, and set the stage for smoother future enhancements.
October 2025
1 Commits • 1 Features
Oct 1, 2025October 2025: Focused on stabilizing observability integration by upgrading the CppTrace library and aligning include paths to improve compatibility and build reliability across the Nebulastream repository. The cpptrace upgrade to 1.0.4 and include-path fixes reduce build friction, enable more consistent tracing instrumentation, and set the stage for smoother future enhancements.
June 2025
6 Commits • 2 Features
Jun 1, 2025June 2025: Focused on stabilizing and extending NebulaStream's SQL execution and runtime safety. Delivered robust union handling with parser and pipeline fixes, introduced a strongly typed PhysicalSourceId to improve type safety, and implemented logging and garbage-collection improvements for pipelines and SliceStore. These changes reduce failure modes for complex unions, improve resource management, and provide clearer diagnostics, contributing to more reliable builds and faster debugging. Technologies demonstrated include parser/pipelining, type-safe design, and test-driven verification.
6 Commits • 2 Features
Jun 1, 2025June 2025: Focused on stabilizing and extending NebulaStream's SQL execution and runtime safety. Delivered robust union handling with parser and pipeline fixes, introduced a strongly typed PhysicalSourceId to improve type safety, and implemented logging and garbage-collection improvements for pipelines and SliceStore. These changes reduce failure modes for complex unions, improve resource management, and provide clearer diagnostics, contributing to more reliable builds and faster debugging. Technologies demonstrated include parser/pipelining, type-safe design, and test-driven verification.
June 2025
Activity
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Quality Metrics
Correctness87.8%
Maintainability84.4%
Architecture82.2%
Performance82.2%
AI Usage22.2%
Skills & Technologies
Programming Languages
C++PythonSQL
Technical Skills
ANTLRC++C++ DevelopmentC++ developmentCMakeCode RefactoringCompiler DesignCompiler DevelopmentConcurrencyData AggregationDebuggingLibrary managementOperator DevelopmentPipeline OptimizationRefactoring
Repositories Contributed To
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