--- title: Crafting an Extension Framework for MySQL: a talk from... description: A VillageSQL engineer's MySQL BR Conf 2026 talk covers the design of the VillageSQL Extension Framework (VEF). It opens with a silly example, a ROT13 data... canonical: https://daily.dev/posts/crafting-an-extension-framework-for-mysql-a-talk-from-mysql-br-conf-2026-uybzv2wnq twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Crafting an Extension Framework for MySQL: a talk from MySQL BR Conf 2026 | daily.dev og:description: A VillageSQL engineer's MySQL BR Conf 2026 talk covers the design of the VillageSQL Extension Framework (VEF). It opens with a silly example, a ROT13 data... og:url: https://daily.dev/posts/crafting-an-extension-framework-for-mysql-a-talk-from-mysql-br-conf-2026-uybzv2wnq og:image: https://api.daily.dev/og/posts/UyBzv2WNQ.png og:image:alt: Crafting an Extension Framework for MySQL: a talk from MySQL BR Conf 2026 og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Crafting an Extension Framework for MySQL: a talk from MySQL BR Conf 2026 **[Planet MySQL](https://daily.dev/sources/planet-mysql)** · 2 min read · 0 upvotes · 0 comments ## Summary A VillageSQL engineer's MySQL BR Conf 2026 talk covers the design of the VillageSQL Extension Framework (VEF). It opens with a silly example, a ROT13 data type, to illustrate the framework's design choices. VEF-Defined Functions (VDFs) resemble MySQL's User-Defined Functions but aim to be easier and safer to write in C++. The talk also covers types that take parameters, by generalizing ROT13 into ROT(K), an 'escape path' design pattern for functions without tidy compile-time signatures, and what happened when VillageSQL's Claude Code skill ported PostgreSQL's hstore extension. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Questions this post answers ### How does VillageSQL's Extension Framework differ from standard MySQL User-Defined Functions? VillageSQL's Extension Framework (VEF) uses VEF-Defined Functions (VDFs), which resemble MySQL's User-Defined Functions but are designed to be easier to write in C++ and harder to misuse. The framework also supports types that take parameters, such as vectors needing a length, and includes an 'escape path' pattern for functions lacking tidy, compile-time signatures like printf. _Engineers evaluating MySQL extension tooling can track frameworks like this one on daily.dev._ ### Can PostgreSQL extensions like hstore be ported to MySQL? Yes, VillageSQL ported PostgreSQL's hstore extension to its MySQL-based Extension Framework using VillageSQL's Claude Code skill, demonstrating the practicality of cross-database extension porting. The talk at MySQL BR Conf 2026 covers what the port involved and its cost, though specific cost figures were not detailed beyond discussing the process. _Developers weighing cross-database extension work can follow cases like this on daily.dev._ ## Similar posts on daily.dev - [VillageSQL Launches as an Extension-Focused MySQL Fork](https://daily.dev/posts/villagesql-launches-as-an-extension-focused-mysql-fork-wtp9aqfiz) · InfoQ · 0 upvotes · 0 comments - [Announcing VillageSQL Server 0.0.7](https://daily.dev/posts/announcing-villagesql-server-0-0-7-lowol1ejh) · Planet MySQL · 0 upvotes · 0 comments - [Using DuckDB inside MySQL](https://daily.dev/posts/using-duckdb-inside-mysql-9ccseeutn) · Planet MySQL · 0 upvotes · 0 comments - [Things I want in a modern relational query language](https://daily.dev/posts/things-i-want-in-a-modern-relational-query-language-y0qgepv3u) · Lobsters · 1 upvotes · 0 comments - [The revenge of SQL: How a 50-year-old language reinvents itself](https://daily.dev/posts/the-revenge-of-sql-how-a-50-year-old-language-reinvents-itself-ptgmonz65) · InfoWorld · 1 upvotes · 0 comments --- Tags: [#open-source](https://daily.dev/tags/open-source), [#postgresql](https://daily.dev/tags/postgresql), [#c++](https://daily.dev/tags/c++), [#mysql](https://daily.dev/tags/mysql) [View this post on daily.dev](https://daily.dev/posts/crafting-an-extension-framework-for-mysql-a-talk-from-mysql-br-conf-2026-uybzv2wnq) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Crafting an Extension Framework for MySQL: a talk from MySQL BR Conf 2026","url":"https://daily.dev/posts/crafting-an-extension-framework-for-mysql-a-talk-from-mysql-br-conf-2026-uybzv2wnq","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/crafting-an-extension-framework-for-mysql-a-talk-from-mysql-br-conf-2026-uybzv2wnq"},"datePublished":"2026-10-26T14:36:22.501Z","dateModified":"2026-10-26T14:36:47.385Z","description":"A VillageSQL engineer's MySQL BR Conf 2026 talk covers the design of the VillageSQL Extension Framework (VEF). 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