nebulastream/nebulastream
Jun 2025 – Jun 2025
1 Month active
Languages Used
C++SQL
Technical Skills
ANTLRC++ DevelopmentCode RefactoringCompiler DesignCompiler DevelopmentConcurrency
Benjamin Greb
PROFILE
Benjamin Greb
Benjamin Greb worked on stabilizing and extending NebulaStream’s SQL execution by improving union operation handling and enhancing runtime safety. He addressed complex union scenarios by refining the SQL parser and pipeline construction, ensuring correct aggregation and windowing behavior. Using C++ and ANTLR, Benjamin introduced a strongly typed PhysicalSourceId, refactoring system components for improved type safety and reliability. He also optimized pipeline resource management by refining logging and garbage collection in the SliceStore, reducing resource leaks and clarifying diagnostics. His contributions to the nebulastream/nebulastream repository demonstrated depth in compiler development, system programming, and test-driven verification, resulting in more robust and maintainable builds.
Overall Statistics
Feature vs Bugs
50%Features
Repository Contributions
6Total
Bugs
2
Commits
6
Features
2
Lines of code
341
Activity Months1
Your Network
36 peopleShared Repositories
36
Adrian MichalkeMember
Afrasiyab KhaliliMember
aleppingMember
Benjamin GrebMember
Benedikt Maria BeckermannMember
tdietzel@beaverMember
Eric BenschneiderMember
Eric BenschneiderMember
fkuzunMember
Work History
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
Correctness88.4%
Maintainability83.4%
Architecture80.0%
Performance80.0%
AI Usage20.0%
Skills & Technologies
Programming Languages
C++SQL
Technical Skills
ANTLRC++ DevelopmentCode RefactoringCompiler DesignCompiler DevelopmentConcurrencyData AggregationDebuggingOperator DevelopmentPipeline OptimizationRefactoringSQLSQL ParsingSystem DesignSystem Programming
Repositories Contributed To
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