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Nightmare on Collation Street - April 7, 2026

Date:

Location: Online

Speakers: Yevhen Patlan

Character collations - the rules for comparing and sorting character strings - are not universal, even languages which use the same characters may sort them differently. These rules may also not be stable, and the libraries implementing them may have errors, requiring fixes and updates. When character string data is indexed or partitioned under one set of rules, then queried under another, it may create some problems.

Join Jan and Alastair for a discussion about how this becomes your Postgres database’s problem, when it may come for you, and how to avoid trouble. We’ll give you one spoiler, running upstairs is no more useful here than in any slasher movie.

Join our Open Source Unplugged!

Percona Open Source Unplugged Nightmare on Collation Street
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Speakers

Yevhen Patlan

Yevhen Patlan

Yevhen Patlan is a technology leader with nearly 20 years of experience in build and release engineering. He has a strong record of building release processes and leading high-performing teams across cloud platforms. He works hands-on with Perl, Python, Bash, Docker, and Debian and RPM packaging, and he consistently delivers reliable, high-quality software releases. He loves open source and contributes to it. He is also pursuing a PhD and co-founding a charity organization in Ukraine.

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