oxisqlite-core

The engine core of the C-free oxisqlite engine — a Pure-Rust fork of limbo 0.0.22, internal to the OxiSQL workspace.

This is the heart of the engine that powers the oxisql-sqlite-compat backend. It contains:

• the VDBE bytecode interpreter,

• B-tree storage, the pager, and WAL,

• SQL → bytecode translation,

• MVCC transaction machinery,

• JSON / JSONB support, and

• the SQL built-in functions.

• Role: engine core (interpreter, storage, translation, functions).

• Approx LOC: ~62,000.

• Pure Rust / no C: 100% Rust. No C allocator, no C parser generator, no cc / build.rs. CC=/usr/bin/false cargo build succeeds.

• Internal: private member of the OxiSQL workspace; not published separately.

COOLJAPAN changes vs upstream limbo

Two notable modifications were made on top of limbo 0.0.22:

1. Full-transaction ROLLBACK. Upstream lacked complete rollback of an open write transaction; it was ported from turso_core 0.7.0-pre.5 (MIT). The change spans translate/rollback.rs, vdbe/execute.rs, storage/wal.rs, and storage/pager.rs.

2. Pure-Rust Julian-day conversion. The GPL-licensed julian_day_converter dependency was removed and replaced by an inline, chrono-based functions/julian_day.rs, keeping the crate's date/time functions compatible while preserving Apache-2.0 licensing.

Fork lineage & licensing

Part of a COOLJAPAN C-free fork of limbo 0.0.22 (MIT). Full attribution, the upstream commit, the turso_core ROLLBACK provenance, and per-component licensing are recorded in the repo-root /NOTICE.

Copyright © 2024–2026 COOLJAPAN OU (Team Kitasan). COOLJAPAN code is licensed under Apache-2.0; upstream limbo code remains under MIT (see /NOTICE).

Part of the OxiSQL workspace.