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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

Work History

January 2025

6 Commits • 1 Features

Jan 1, 2025

January 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.

Activity

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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

Repositories Contributed To

1 repo

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

Altinity/ClickHouse

Jan 2025 Jan 2025
1 Month active

Languages Used

C++MarkdownSQL

Technical Skills

Arithmetic OperationsC++Data TypesDatabaseDatabase DevelopmentDatabase Testing