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storage-engine-playground/tools/plan-viewer/README.md
Hassan Abedi f5a146776e WIP
2026-06-11 16:00:58 +02:00

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Query Plan Viewer

A static HTML viewer for plan-runner JSON files (the fixtures). It evaluates a fixture in the browser and renders the plan DAG, the input facts, the relation computed at every plan node, and a per-row comparison against expected_bindings.

Usage

Open index.html in a browser, then drop a fixture from crates/plan-runner/fixtures/ onto the page or pick one with the file input.

When the repository is served over HTTP (make viewer), a fixture can also be loaded through a query parameter:

http://localhost:8000/tools/plan-viewer/index.html?fixture=../../crates/plan-runner/fixtures/two_atom_join.json

Scope

The viewer re-implements the operator semantics of crates/query-ops and crates/plan-runner in JavaScript, for display only. The Rust crates and their tests remain the correctness oracle; if the two ever disagree, the Rust behavior wins and the viewer has a bug. Only scan and join actions are supported.