Altinity/ClickHouse
Jan 2025 – Jan 2025
1 Month active
Languages Used
C++MarkdownSQL
Technical Skills
Arithmetic OperationsC++Data TypesDatabaseDatabase DevelopmentDatabase Testing
Li Yin
PROFILE
Li Yin
Worked on the Altinity/ClickHouse repository to implement a DateTime64 subtraction operator supporting operations with various date and time types. This feature enhanced precision and introduced robust overflow and decimal overflow checks, addressing edge cases in time-based analytics. The developer refactored binary arithmetic utilities using C++ template lambdas, improving code maintainability and clarity. Updates to the test suite ensured coverage of new semantics and resolved issues related to session_timezone and timezone handling. Documentation was revised to reflect the new operator’s usage and edge cases. The work leveraged C++, SQL, and database testing skills to deliver a more reliable arithmetic abstraction.
Overall Statistics
Feature vs Bugs
100%Features
Repository Contributions
6Total
Bugs
0
Commits
6
Features
1
Lines of code
329
Activity Months1
Your Network
512 peopleSame Organization
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Bao JiangnanMember
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bujianbinMember
caichengnanMember
Belinda CaoMember
htc070011Member
Rui CaoMember
Work History
January 2025
6 Commits • 1 Features
Jan 1, 2025January 2025 (Altinity/ClickHouse): Implemented the DateTime64 subtraction operator supporting subtraction with other date/time types, with improved precision, overflow checks, and decimal overflow handling. Updated tests to cover new semantics and fixed failures related to session_timezone/timezone handling. Refactored the binary arithmetic utility using template lambdas to improve maintainability. Updated documentation to reflect the new operator and its edge cases. This work reduces risk in time-based analytics and enhances developer productivity through clearer arithmetic abstractions and a more robust test suite.
6 Commits • 1 Features
Jan 1, 2025January 2025 (Altinity/ClickHouse): Implemented the DateTime64 subtraction operator supporting subtraction with other date/time types, with improved precision, overflow checks, and decimal overflow handling. Updated tests to cover new semantics and fixed failures related to session_timezone/timezone handling. Refactored the binary arithmetic utility using template lambdas to improve maintainability. Updated documentation to reflect the new operator and its edge cases. This work reduces risk in time-based analytics and enhances developer productivity through clearer arithmetic abstractions and a more robust test suite.
January 2025
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Quality Metrics
Correctness98.4%
Maintainability90.0%
Architecture86.6%
Performance81.6%
AI Usage20.0%
Skills & Technologies
Programming Languages
C++MarkdownSQL
Technical Skills
Arithmetic OperationsC++Data TypesDatabaseDatabase DevelopmentDatabase TestingDocumentationError HandlingOperator OverloadingPerformance OptimizationRefactoringSQLTemplate MetaprogrammingTesting
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