GoSQL – A query engine in 319 LoC
I've always been curious about how SQL engines actually work. So I built a minimum viable SQL engine in Go. - Supports CSV files as tables - Supports SELECT, FROM, WHERE, LIMIT It's very simple: 1. Parses query string 2. Converts it into an AST representation 3. Executes the query against the CSV 4. Returns the results
In plain words
GoSQL is a minimal SQL query engine written in Go with just 319 lines of code. It lets users run basic SQL queries against CSV files, supporting SELECT, FROM, WHERE, and LIMIT operations. The engine works by parsing the query string into an abstract syntax tree, then executing it against the data and returning results. Built as an educational project to demonstrate how SQL engines function, it serves developers interested in understanding query processing fundamentals.
written from the facts on this page · September 2026
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