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
Worked on stabilizing and extending NebulaStream’s SQL execution by improving union operation handling and enhancing runtime safety. Addressed complex SQL query scenarios by refining the parser for nested unions and optimizing pipeline construction, using C++ and ANTLR for robust code changes. Introduced a strongly typed PhysicalSourceId to the NES system, increasing type safety and reducing potential errors in source management. Enhanced resource management through improved garbage collection and logging within the SliceStore component. All changes were test-driven, with expanded coverage for union aggregation and windowing, resulting in more reliable builds and faster debugging across the nebulastream/nebulastream repository.
Overall Statistics
Feature vs Bugs
50%Features
Repository Contributions
6Total
Bugs
2
Commits
6
Features
2
Lines of code
341
Activity Months1
Your Network
39 peopleShared Repositories
39
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
Loading activity data...
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
Overview of all repositories you've contributed to across your timeline