🪝 QAIL

The AST-Native Query Compiler

Build with AST. Execute with Bytes.

QAIL AST

Qail::get("users") .select_all()
                                .filter("active", Eq, true)

PostgreSQL SELECT * FROM users WHERE active = true

Qdrant filter: { must: [...] }

❌ ORMs: Code → Parse → AST → SQL String → DB Parses Again → Execute

⚠️ Raw SQL: "SELECT..." → DB Parses → Execute Errors at runtime.

✅ QAIL: AST → Binary Protocol → Execute Errors at compile-time.

Get Started The Manifesto

cargo install qail

npm i qail-wasm

zig fetch --save ...qail-zig/v0.2.0.tar.gz

Rust

Python

PHP

Java

Node

C/C++

Rust

Python

PHP

Java

Node

C/C++

Native Rust • Universal C-API • WASM

Why QAIL?

AST-first. Native drivers. Zero transpilation overhead.

🧬

AST-First Architecture

Build queries as native data structures. No string parsing. No text-to-AST-to-text overhead.

🔌

Native Database Drivers

Direct wire protocol. No SQLx middleman. Full control over connection and execution.

🛡️

Structurally Safe

Injection impossible by design. Code and data separated at the AST level, not string level.

🌐

SQL + Vector Unified

Same Qail AST encodes to PostgreSQL and Qdrant. Relational AND vector search, one syntax.

⚡

Zero Overhead

No runtime parsing. AST is built at compile time, serialized directly to wire protocol.

🎯

Type Safe End-to-End

Schema validation at build time. Wrong queries don't compile. Wrong types don't bind.

🦀 QAIL's Position

4% faster than C

353k vs 339k q/s

12% ahead of Go

pgx 303k q/s

16x faster

Python asyncpg ~21k q/s

View full benchmarks →

Supported Databases

One AST. Two powerhouses. SQL + Vector.

PostgreSQL

Relational • Transactions • ACID

β Beta

Qdrant

Vector • AI/ML • Semantic Search

α Alpha

The modern stack: Relational data in PostgreSQL, intelligent search in Qdrant.

Language Drivers

Native packages for your language. All powered by one Rust core.

Zig

Pure Zig • TLS • Pool v0.2.0

Rust

cargo add qail-core Cargo

PHP

31K q/s • 2.6x Eloquent > GitHub

Go

126K q/s • 4.2x GORM GitHub

Python

130K rows/s COPY GitHub

WASM / Node

npm i qail-wasm NPM

View all drivers →

🛡️ The "Wait, Stop!" Feature

The only migration tool that reads your code before it touches your data.

Terminal

$ qail migrate up schema.qail --codebase ./src

🛑 BLOCKED: Safety Check Failed

You are dropping column 'status', but it is still used in:

   📄 src/queries.ts:25  → get portfolio fields status
   📄 src/api.rs:102     → Qail::get("portfolio").filter("status"...)

Fix your code first, or use --force to proceed.

🔍

Scans Before Running

Searches .rs, .ts, .js, .py for queries that reference changing columns

📍

Points to Line Numbers

Shows exactly where your code needs updating before migration

🎯

You're the Boss

Use --force to override when you know better

One Language. Everywhere.

Rust

qail-core + builder API

🌐

Browser

qail-wasm (~50KB)

📦

Node.js

npm install qail-wasm

Skip the String Layer.

Build with AST. Execute with Bytes.

Read the Docs View on GitHub