WeChat Client Technology Team

Sep 14, 2015 · Databases

Inside SQLite’s Virtual Machine: How VDBE Executes SQL with Lemon and LR Parsing

This article explains SQLite's Virtual Database Engine (VDBE) architecture, its LR‑based grammar compilation using Lemon, compares it with Lua's virtual machine, and details the instruction set, execution flow, and stack versus register implementations.