18th July 2026
Tool
SQLite Query Explainer
— View Mozilla Bugzilla bug reports and run SQL queries against a SQLite database to see exactly how SQLite executes them. The tool annotates every line of `EXPLAIN QUERY PLAN` and low-level `EXPLAIN` bytecode output with plain-English descriptions of what the query planner and virtual machine are doing.
Julia Evan's, in Learning a few things about running SQLite:
Maybe one day I’ll learn to read a query plan.
Big same.... which inspired me to have Fable build this interactive explain tool, which runs SQLite in Python in Pyodide in Web Assembly in the browser and adds a layer of explanation to the results of both EXPLAIN and EXPLAIN QUERY PLAN.
Approach with caution, since I don't know enough about SQLite query plans to verify the results myself, but it seems cromulent enough to me.
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