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Wu Xueyang

PROFILE

Wu Xueyang

Worked on the StarRocks and pinterest/starrocks repositories, delivering features and fixes focused on backend data systems and search performance. Built conditional update support for insert loads, enabling targeted upserts and improving ETL flexibility using Java and SQL. Developed diagnostic tools for metadata extraction and page integrity validation in C++, enhancing data reliability and operational safety. Addressed replicated storage handling for OLAP tables, reducing misconfiguration risk and supporting analytics stability. Most recently, implemented N-gram indexing for the inverted index to accelerate text search queries, applying algorithm design and data structure expertise to optimize large-scale database search capabilities and performance.

Overall Statistics

Feature vs Bugs

60%Features

Repository Contributions

6Total
Bugs
2
Commits
6
Features
3
Lines of code
1,682
Activity Months4

Work History

January 2026

1 Commits • 1 Features

Jan 1, 2026

January 2026 (Month: 2026-01) — Focused on delivering a high-value feature to improve search capabilities in pinterest/starrocks. Key feature delivered: N-gram indexing for the inverted index to enhance text search performance, enabling more efficient text queries and faster response times. No major bugs fixed this month; efforts were oriented toward feature delivery, code quality, and performance readiness. Overall impact: the new N-gram indexing is expected to reduce search latency for text-based queries and improve search relevance, contributing to a stronger user search experience and scalable indexing for large text corpora. Technologies/skills demonstrated: indexing algorithms, inverted index optimization, performance-oriented development, code instrumentation, Git traceability with issue/PR references, and cross-team collaboration with search/backend engineers.

December 2025

1 Commits

Dec 1, 2025

December 2025 monthly summary for pinterest/starrocks focusing on reliability and correctness improvements in replicated storage handling for OLAP workloads. Delivered a critical bug fix that ensures the property enabling replicated storage is consistently analyzed and applied for OLAP tables and materialized views, significantly increasing configuration stability and reducing misconfigurations in analytic pipelines. The work strengthens analytics reliability and trust in OLAP/Materialized View configurations, supporting stable business intelligence and data-driven decision making.

November 2025

2 Commits • 1 Features

Nov 1, 2025

November 2025 (2025-11) monthly summary for pinterest/starrocks: Delivered diagnostic tooling and storage safety improvements to enhance data integrity, observability, and configuration reliability. Key features delivered: introduced DumpOrdinalIndex to extract ordinal index metadata and VerifyPageChecksum to validate page data in segment files, enabling faster root-cause analysis and data integrity checks. Major bugs fixed: prevented replicated storage from being set when GIN indexes are present, eliminating misconfigurations and related runtime errors. Impact: stronger data integrity verification, safer replication configurations, and reduced operational risk in cloud-native deployments. Technologies demonstrated: tooling development for metadata extraction and integrity verification, plus configuration safety checks and cross-team collaboration on storage strategies.

October 2025

2 Commits • 1 Features

Oct 1, 2025

Month: 2025-10 — In StarRocks/starrocks, delivered conditional updates during insert loads with merge_condition support. Extended InsertPlanner to process a merge_condition property to enable targeted updates during inserts. Updated documentation and added SQL tests to verify conditional upserts during insert loads. This enables more flexible ETL workflows, improves data consistency during bulk loads, and reduces post-load reconciliation. Demonstrated strong design and testing discipline with code changes and test coverage across planner, tests, and docs. Technologies: Java/SQL engine components, testing frameworks, and SQL-level test tooling; emphasis on maintainability and correctness.

Activity

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Quality Metrics

Correctness88.4%
Maintainability83.4%
Architecture85.0%
Performance83.4%
AI Usage23.4%

Skills & Technologies

Programming Languages

C++JavaSQL

Technical Skills

Algorithm DesignBackend DevelopmentC++C++ developmentData EngineeringData StructuresDatabaseDatabase ManagementJavaSQLTestingback end developmentbackend developmentdata integrity validationdatabase management

Repositories Contributed To

2 repos

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

pinterest/starrocks

Nov 2025 Jan 2026
3 Months active

Languages Used

C++Java

Technical Skills

C++ developmentJavabackend developmentdata integrity validationdatabase managementfile handling

StarRocks/starrocks

Oct 2025 Oct 2025
1 Month active

Languages Used

JavaSQL

Technical Skills

Backend DevelopmentData EngineeringDatabaseSQLTesting