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Sergey Petrunya

Sergei Petrunia has been working on MySQL codebase since 2003.

His primary area of expertise is query optimizer, where he has developed code for features like Table Elimination (MariaDB) index_merge, partition pruning (MySQL), index/engine condition pushdown, and subquery optimizations (MySQL and MariaDB)

He has also done smaller improvements in other parts of the server.

He has a blog at