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Yura Sorokin
Yura is a Principal Software Engineer at Percona, mostly working on Percona Server Core. You might have heard of him as an author of "Compressed Columns with Dictionaries", "SEQUENCE_TABLE()" and "C++ UDF wrappers". Before joining in July 2015 he was leading a cloud file service backend dev team which was focusing on client-side encryption. He has 20+ years of software development experience, primarily in C++. Yura holds Master degree in Computer Science from National Technical University of Ukraine. He lives in Kyiv, Ukraine.

An Introduction to Dictionary Operations in Data Masking Component

In this blog post, we will describe typical usage scenarios for dictionary operations in the Data Masking Component, which is available in Percona Server for MySQL as an open source alternative to Oracle’s enterprise version. In particular, we will consider the following functions. gen_dictionary() – a function that returns a random term from a dictionary. gen_blocklist() – […]

Percona Server for MySQL Data Masking Enhanced with Dictionary Term Cache

In Percona Server for MySQL 8.0.41 / 8.4.4, we significantly re-designed the Data Masking Component. In particular, we made the following changes: Changed the user on behalf of whom we execute internal queries for dictionary operations. Introduced an in-memory dictionary term cache that allows significant speed-up of dictionary operations. Introduced masking_dictionaries_flush() User Defined Function. Introduced […]

Percona Server for MySQL: Enhanced Encryption UDFs

In Percona Server for MySQL 8.0.41 / 8.4.4, we introduced several improvements in Encryption User-Defined Functions. Added support for RSAES-OAEP (OAEP) padding for RSA encrypt / decrypt operations. Added support for RSASSA-PSS (PSS) padding for RSA sign / verify operations. Added new encryption_udf.legacy_padding_scheme component system variable. Normalized character set support for all Encryption UDFs. PKCS1 […]

A Workaround for The “RELOAD/FLUSH_TABLES privilege required” Problem When Using Oracle mysqldump 8.0.32

In MySQL Server 8.0.32, Oracle fixed Bug #105761: “mysqldump make a non-consistent backup with ‐‐single-transaction option” (this commit) which caused a wave of complaints from users who could no longer do backups with the mysqldump utility because of the lack of the required privileges. Bug #109701 “Fix for #33630199 in 8.0.32 introduces regression when ‐‐set-gtid-purged=OFF” […]

Digital Signatures: Another Layer of Data Protection in Percona Server for MySQL

Imagine you need to design an online system for storing documents on a per-user basis where nobody, including database administrators, would be able to change the content of those documents without being noticed by document owners. In Percona Server for MySQL 8.0.28-20, we added a new component called Encryption UDFs – an open-source alternative to […]