Huaiyu Xu
Infrastructure Engineer at PingCAP
Haidian District, Beijing, China
Summary
🤩
Rockstar🎓
Top SchoolHuaiyu Xu is an Infrastructure Engineer with 11 years of experience specializing in distributed SQL engines and backend systems, currently driving kernel development and performance optimization for TiDB at PingCAP. He contributes actively to high-profile open-source projects like TiDB, TiFlash, and the MySQL-compatible parser, implementing SQL grammar features, builtin functions, and string/aggregation utilities that improve query correctness and efficiency. Based in Haidian District, Beijing, he blends deep systems-level expertise—query optimization, execution, and distributed computing—with practical service reliability work to keep production clusters stable. Notably, his contributions span both parser-level grammar tweaks and engine-level performance fixes, reflecting a rare full-stack fluency within the database kernel. He holds a master's in Computer Science from Beijing University of Posts and Telecommunications.
11 years of coding experience
硕士, 计算机科学与技术, 硕士, 计算机科学与技术 at 北京邮电大学
Github Skills (22)
sql-parser10
c-language10
strings10
back-end-development10
mysql10
text-manipulation10
tidb10
databases10
go10
sql10
cprogramming-language10
relational-databases10
sql-database10
database10
model-driven9
Programming languages (13)
Github contributions (5)
pingcap/tidb
Jul 2016 - Dec 2022
TiDB - the open-source, cloud-native, distributed SQL database designed for modern applications.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:1 release, 2102 reviews, 545 commits in 6 years 5 months
Contributions summary:Huaiyu appears to be a back-end developer contributing to the TiDB open-source database. Their commits involve implementing and integrating features like the `HEX` builtin function and the ability to prune columns. They also added support for UPDATE and DELETE statements within the new plan, and refined the time zone implementation. They have experience working on the expression rewriter and testing framework.
ai-poweredtidbserverlesshtapreal-time
pingcap/parser
Oct 2018 - May 2020
A MySQL Compatible SQL Parser
Role in this project:Back-end Developer
Back-end DeveloperContributions:5 reviews, 23 commits, 42 PRs in 1 year 7 months
Contributions summary:Huaiyu's contributions primarily focused on enhancing the MySQL compatible SQL parser. They implemented support for new grammar rules, such as using `index(primary)` without backquotes, and addressed comments to improve code quality. They also added features like `IsAutoIncColUnsigned` and modified MySQL version information. Furthermore, the user supported the syntax for `admin reload expr_pushdown_blacklist` and `INSERT INTO tbl_name PARTITION`.
sql-parsermysqlsqlparsernom
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