LionSQL

Single-binary, high-concurrency OLTP database server supporting T-SQL and stored procedures

(한국어 문서는 README.ko.md를 참조하세요.)

Overview

LionSQL is a high-performance, embedded OLTP database engine that natively compiles and executes Microsoft SQL Server T-SQL & stored procedures and complex business logic on a sub-microsecond VDBE bytecode virtual machine, while simultaneously offering broad compatibility with PostgreSQL SQL dialects and the standard PGWire v3 protocol. It comes fully equipped with a built-in web management studio for real-time telemetry and schema administration, as well as an integrated goroutine connection pooler capable of handling tens of thousands of concurrent connections—eliminating the need for additional software to achieve a complete operational environment. Packaging this complete enterprise feature set into a single, ultra-compact static binary under 100MB (currently ~50MB) with zero external dependencies, LionSQL delivers blazing-fast transaction throughput of tens of thousands of transactions per second with predictable sub-millisecond latency and non-blocking snapshot isolation.

Note

Supported Operating Systems: LionSQL officially supports macOS and Linux (x86_64 and arm64). Standalone single-binary builds for Windows (bin/lionsql.exe, in-memory OCC engine) are also available.

                    +------------------------------------------+
                    |                 LionSQL                  |
                    |  (Single Standalone Static Go Executable)|
                    +------------------------------------------+
                                         │
        ┌────────────────────────────────┼────────────────────────────────┐
        │                                │                                │
        ▼                                ▼                                ▼
[Postgres Wire v3]             [MSSQL TDS 7.x/8.0]             [Web Studio & BaaS API]
  Port :5433                      Port :1433                      Port :8090 /_/
 (psql, DBeaver,                  (sqlcmd, SSMS,                  (Browser Dashboard,
  GORM, Prisma)                    Azure Data Studio)              REST API, Realtime SSE,
        │                                │                         Webhooks, RLS, Cron,
        │                                │                         Mailer, JS/TS SDK)
        └────────────────────────────────┼────────────────────────────────┘
                                         │
                                         ▼
                    +------------------------------------------+
                    |      Goroutine Connection Pooler         |
                    |    (Replaces PgBouncer; 10,000+ conns)   |
                    +------------------------------------------+
                                         │
                                         ▼
                    +------------------------------------------+
                    |    Dual-Parser & Cost-Based Optimizer    |
                    | (Native Pratt + ANTLR4 Fallback + CBO)   |
                    +------------------------------------------+
                                         │
                                         ▼
                    +------------------------------------------+
                    |     Unified Native VDBE Bytecode VM      |
                    |  - Interactive DQL & DML (SELECT, DML)   |
                    |  - T-SQL Procedures, Triggers, UDFs, TVFs|
                    |  - sync.Pool Registers & Ambient Tx      |
                    +--------------------+---------------------+
                                         │
                    ┌────────────────────┴────────────────────┐
                    ▼                                         ▼
     [Volcano Relational Pipeline]             [Index & Direct Storage Ops]
     (Hash Join, work_mem External Sort,        (OpIndexScan SkipList/B+Tree,
      Aggregates, OpRelQuery Iteration)          OpInsert, OpUpdate, OpDelete)
                    │                                         │
                    └────────────────────┬────────────────────┘
                                         │
                                         ▼
                    +------------------------------------------+
                    |         Unified Storage Engine           |
                    |  (WiredTiger MVCC & Pure-Go Memory OCC)  |
                    +------------------------------------------+

Key Features

LionSQL's core capabilities are organized across five foundational architectural pillars:

1. Dual Wire Protocols & Connection Pooling

Concurrent Dual Wire Protocols:
- PostgreSQL v3 Protocol (Port 5433): Fully compatible with psql, DBeaver, GORM, Prisma, and pgx, supporting SSL/TLS encryption and binary parameter binding.
- Microsoft SQL Server TDS Protocol (Port 1433): Instantly compatible with SSMS, Azure Data Studio, sqlcmd, and MSSQL drivers, supporting RPC prepared execution.
Built-in Goroutine Connection Pooler: Handles 10,000+ simultaneous connections over lightweight Go goroutines, eliminating connection bottlenecks without external poolers.

2. Enterprise T-SQL Procedural Runtime

Stored Procedures, Functions & Triggers: Full support for CREATE PROCEDURE, scalar and Table-Valued Functions (TVF), and AFTER / INSTEAD OF triggers.
Control Flow & Variables: Supports conditional branching (IF...ELSE), loops (WHILE), exception handling (TRY...CATCH), local variables (@var), table variables, session variables, and cursors.
Rich SQL Extensions: Window functions (ROW_NUMBER, RANK), JSON extraction functions, foreign keys with cascading actions, TRUNCATE TABLE, and SELECT ... INTO.

3. Core Engine & Virtual Machine Architecture

Unified VDBE Virtual Machine: Both interactive queries (SELECT, INSERT, UPDATE, DELETE) and stored procedures execute on the exact same register-based VDBE virtual machine, complete with bytecode disassembly support (EXPLAIN BYTECODE).
Prepared Statement Bytecode Caching: Parameterized queries are compiled directly into bytecode during preparation and cached, completely eliminating query re-parsing overhead on subsequent executions.
Dual-Parser Architecture with Automatic Fallback:
- Ultra Fast-Path: In-house zero-allocation Pratt parser delivering sub-microsecond parsing for high-frequency queries.
- Full-Spec Fallback: Official Microsoft T-SQL parser invoked automatically on advanced syntax (bracket escapes, vendor options) to ensure 100% grammar compatibility.
Volcano Relational Pipeline & Memory Governor: Composable iterator execution (Hash Join, Index Scan, GroupBy) with streaming batches, featuring an automatic disk spill to external merge sort when query memory limits are exceeded.
Cost-Based Optimizer (CBO): Leverages table statistics (cardinality, distinct counts, histograms) and multi-column extended statistics to optimize join orders and generate efficient execution plans.

4. High-Performance Storage & ACID Concurrency

Dual Storage Backends:
- In-Memory OCC Engine: Delivers 186,000+ TPS (and up to 779k tpmC in TPC-C with an ultra-low 3.6% abort rate) based on concurrent SkipList indexes and Optimistic Concurrency Control.
- WiredTiger MVCC Disk Engine: Delivers 120,000+ TPS (and up to 833k tpmC in TPC-C) with full ACID durability backed by lock-free B+Trees.
Bloat-Free MVCC without Vacuum: Multi-version update chains are maintained in memory and only latest committed versions are written to disk, completely eliminating table bloat and Autovacuum I/O storms.
Non-Blocking Snapshot Isolation: Readers never block writers and writers never block readers, ensuring long-running analytical queries or backups never stall online transaction processing.
Non-Blocking Online Snapshot Hot Backup: Captures live, compressed .tar.gz database backups without interrupting active transaction traffic. Supported seamlessly via CLI, REST API, and Web Studio.
High-Availability Replication: Supports real-time WAL stream replication from Primary to Replicas with zero-downtime failover.

5. Web Management Studio & Developer Experience

Single Standalone Executable: Database kernel, wire protocol listeners, REST API, and web studio packaged into a single static executable with zero external runtime dependencies (officially supported on macOS and Linux).
Embedded Web Management Studio (Port 8090): Zero-install browser dashboard (/_/) featuring visual schema explorer, inline data grid editor, SQL query console, real-time event stream viewer, and request activity logs.
Auto-Generated RESTful CRUD API: Instant REST endpoints generated automatically for all tables upon creation, with boolean filtering, sorting, and pagination.
JavaScript & TypeScript Client SDK: Lightweight client SDK served directly by the standalone executable, supporting Browsers, Node.js, Bun, and Deno.
Row-Level Security (RLS) & Automation: Authentication-based data access control (RLS), asynchronous webhooks, 5-field cron automation scheduler, and built-in SMTP mailer.

Quick Start Guide

1. Building from Source

Prerequisites

Supported Operating Systems: macOS, Linux (officially supported), Windows (standalone binary available)
Go 1.22 or higher
(Optional, for WiredTiger backend) wiredtiger development headers and libraries:
- macOS: brew install wiredtiger
- Linux (Ubuntu/Debian): sudo apt-get install libwiredtiger-dev

Build Command

# Build production single binary with WiredTiger support (macOS / Linux)
go build -tags wiredtiger -buildvcs=false -o bin/lionsql ./cmd/lionsql

# Build pure-Go single binary (Zero Cgo dependency, runs everywhere)
go build -buildvcs=false -o bin/lionsql ./cmd/lionsql

# Build Windows standalone binary (Zero Cgo dependency)
CGO_ENABLED=0 GOOS=windows GOARCH=amd64 go build -buildvcs=false -o bin/lionsql.exe ./cmd/lionsql

2. Starting the Server

# Start LionSQL in foreground (default, creates 'data' directory)
./bin/lionsql

# Or start with pure-Go in-memory engine (zero Cgo required)
./bin/lionsql -engine=memory

# Or start as a background daemon with live-logging
./bin/lionsql start -dev

# Inspect status, restart, or stop daemon
./bin/lionsql status
./bin/lionsql restart -dev
./bin/lionsql stop

Upon startup, the console displays the connection endpoints:

--------------------------------------------------------------------------------
 LionSQL - Single binary High-Concurrency OLTP Database Server with T-SQL & Stored Procedure (v0.90.0)
--------------------------------------------------------------------------------
 [Configuration]  Zero-Config (Built-in Defaults)
 [Web Dashboard]  http://127.0.0.1:8090/_/
 [HTTP API]       http://127.0.0.1:8090/api/health
 [CDC Stream]     http://127.0.0.1:8090/api/cdc/stream (NDJSON / SSE)
 [Superuser Auth] admin@lionsql.local (JWT Auth: true)
 [Supported GUI]  DBeaver / Beekeeper Studio / DbGate / Azure Data Studio
 [Postgres Wire]  psql -h 127.0.0.1 -p 5433 (PostgreSQL v3 protocol, psql / pgx)
 [TDS / MSSQL]    sqlcmd -S 127.0.0.1,1433 (TDS 7.x/8.0 protocol, sqlcmd / SSMS)
 [Data Directory] data
 [Storage Engine] wiredtiger
 [Session Pooler] Max Workers: 32, Max Idle Sessions: 64 (No PgBouncer required)
 [Memory Governor] max_memory: 2867MB (Go runtime GC soft limit), work_mem: 64MB (External Merge Sort & HashJoin guard)
 [Replication]    Role: PRIMARY, Node:  (HistoryCap: 10000)
--------------------------------------------------------------------------------

3. Accessing the Web Studio

Open your browser and navigate to:

http://127.0.0.1:8090/_/

The Web Studio provides immediate visual table inspection, real-time query execution, stored procedure inspection, and one-click database backup/restore.

Client Connectivity

Connecting via `psql` (PostgreSQL Client)

psql -h 127.0.0.1 -p 5433 -U admin -d postgres

-- Query sample seeded data
SELECT * FROM accounts;

-- Check execution plan and cost estimates
EXPLAIN ANALYZE SELECT * FROM accounts WHERE balance > 600 ORDER BY balance DESC;

-- Configure session query memory budget
SET work_mem = '128MB';
SHOW work_mem;

Connecting via `sqlcmd` (MSSQL Client)

sqlcmd -S 127.0.0.1,1433 -U admin -d master

-- Execute stored procedure
EXEC TransferFunds @from = 1, @to = 2, @amount = 100;
GO

Bulk Copy Streaming with `psql \copy`

-- High-speed data export to CSV
psql -h 127.0.0.1 -p 5433 -d postgres -c "\copy accounts to 'accounts.csv' with (format csv, header)"

-- High-speed data import from CSV
psql -h 127.0.0.1 -p 5433 -d postgres -c "\copy accounts from 'accounts.csv' with (format csv, header)"

Application Integration & ORMs

Go (`pgx` / `database/sql`)

package main

import (
	"database/sql"
	"fmt"
	"log"

	_ "github.com/jackc/pgx/v5/stdlib"
)

func main() {
	dsn := "postgres://admin:1234567890@127.0.0.1:5433/postgres?sslmode=disable"
	db, err := sql.Open("pgx", dsn)
	if err != nil {
		log.Fatal(err)
	}
	defer db.Close()

	rows, err := db.Query("SELECT id, holder, balance FROM accounts")
	if err != nil {
		log.Fatal(err)
	}
	defer rows.Close()

	for rows.Next() {
		var id int
		var holder string
		var balance int
		if err := rows.Scan(&id, &holder, &balance); err != nil {
			log.Fatal(err)
		}
		fmt.Printf("Account: %d | %s | %d\n", id, holder, balance)
	}
}

JavaScript / TypeScript (Official Client SDK)

import LionSQL from './sdk/lionsql.js';

const client = new LionSQL('http://127.0.0.1:8090', { auth: 'YOUR_API_KEY' });

// 1. Query records with declarative filtering & sorting
const res = await client.collection('accounts').getList(1, 20, {
  filter: 'balance > 500',
  sort: '-balance'
});
console.log(res.items);

// 2. Real-time Live SSE change stream
const unsubscribe = client.collection('accounts').subscribe((event) => {
  console.log('Account mutated:', event.action, event.record);
});

// 3. Execute T-SQL Stored Procedure
await client.exec('TransferFunds', { from: 1, to: 2, amount: 50 });

Python (`psycopg2` / `SQLAlchemy`)

import psycopg2

conn = psycopg2.connect(
    host="127.0.0.1",
    port=5433,
    user="admin",
    password="",
    dbname="lionsql"
)

with conn.cursor() as cur:
    cur.execute("SELECT holder, balance FROM accounts WHERE balance > %s", (500,))
    for row in cur.fetchall():
        print(f"Holder: {row[0]}, Balance: {row[1]}")

conn.close()

Node.js (`pg` / `Prisma`)

const { Client } = require('pg');

const client = new Client({
  host: '127.0.0.1',
  port: 5433,
  user: 'admin',
  database: 'lionsql',
});

async function run() {
  await client.connect();
  const res = await client.query('SELECT * FROM accounts');
  console.log(res.rows);
  await client.end();
}

run();

Command-Line Interface (CLI) Reference

Configuration Flags

Flag	Default	Description
`-http`	`127.0.0.1:8090`	HTTP service and embedded Web Studio address
`-pg`	`127.0.0.1:5433`	PostgreSQL wire protocol listen address
`-tds`	`127.0.0.1:1433`	Microsoft SQL Server TDS protocol listen address
`-dir`	`data`	Database storage directory
`-engine`	`wiredtiger`	Storage engine backend (`wiredtiger` or `memory`)
`-ephemeral`	`false`	Disable WAL/AOF persistence for in-memory engine (pure RAM)
`-replica-of`	`""`	Primary server URL to stream WAL from (runs as read-only replica)
`-node-id`	`"node-1"`	Unique cluster node identifier for replication tracking
`-work-mem`	`64MB`	Default memory limit per query operator before spill-to-disk
`-max-workers`	`NumCPU * 4`	Maximum concurrent query execution workers
`-max-idle-sessions`	`64`	Maximum idle storage sessions to retain in pool
`-auth`	`false`	Enforce JWT authentication on protected REST endpoints
`-seed`	`true`	Seed sample accounts and `TransferFunds` procedure on startup

Unified CLI & Daemon Controls

LionSQL provides a modern, unified CLI with first-class lifecycle commands:

# Foreground execution (default)
./bin/lionsql                   # Start immediately using ./data
./bin/lionsql serve -dir=./data # Explicit serve subcommand

# Background daemon management
./bin/lionsql start -dev        # Start daemon in background (creates lionsql.pid & lionsql.log)
./bin/lionsql status            # Inspect daemon status and PID
./bin/lionsql restart -dev      # Graceful restart daemon
./bin/lionsql stop              # Graceful stop daemon

# Operational subcommands
./bin/lionsql version           # Display engine version and build tags
./bin/lionsql doctor            # Verify environment, ports, and permissions
./bin/lionsql init-config       # Generate default lionsql.json configuration file
./bin/lionsql sql "SELECT 1"    # Quick interactive query execution

Declarative Schema Migrations CLI (`lionsql migrate`)

# Create a new timestamped migration pair (.up.sql / .down.sql)
./bin/lionsql migrate new create_users_table

# Apply all pending migrations atomically
./bin/lionsql migrate up -data=./data

# Roll back the most recent migration step
./bin/lionsql migrate down -steps=1 -data=./data

# View migration deployment status
./bin/lionsql migrate status -data=./data

Backup & Restore Operations

# Offline or CLI-driven snapshot hot backup to target archive
./bin/lionsql backup -dir=data -target=/backups/lionsql-snapshot.tar.gz

# Restore database from archive
./bin/lionsql restore -dir=data -source=/backups/lionsql-snapshot.tar.gz

# Online live backup download via curl while server is running
curl -OJ http://127.0.0.1:8090/api/backup

# Online restore via HTTP POST multipart upload
curl -X POST -F "backup=@/backups/lionsql-snapshot.tar.gz" http://127.0.0.1:8090/api/restore

HTTP REST API Reference

LionSQL exposes a complete PocketBase-style REST API on :8090:

Method	Endpoint	Description
`GET`	`/api/health`	Service health and version check
`GET`	`/api/pool/stats`	Realtime worker pool and connection pooler metrics
`GET`	`/api/realtime`	Server-Sent Events (SSE) live data mutation stream
`POST`	`/api/sql`	Execute SQL/T-SQL statement directly (`{"sql": "..."}`)
`GET`	`/api/tables`	List all tables and schemas
`POST`	`/api/tables`	Create a new table
`GET`	`/api/tables/{name}/records`	Get records with pagination, sorting, and search
`POST`	`/api/tables/{name}/records`	Insert a new record
`PATCH`	`/api/tables/{name}/records/{pk}`	Update a record by primary key
`DELETE`	`/api/tables/{name}/records/{pk}`	Delete a record by primary key
`GET`	`/api/procs`	List all registered stored procedures
`POST`	`/api/procs`	Register a stored procedure script
`POST`	`/api/procs/{name}/exec`	Execute stored procedure via JSON parameters
`GET`	`/api/backup`	Stream live `.tar.gz` snapshot hot backup
`POST`	`/api/backup`	Create backup file on server (`{"target": "path"}`)
`POST`	`/api/restore`	Restore database from archive file or multipart upload
`GET`	`/api/replication/status`	Get node replication role, LSN, lag, and replica list
`GET`	`/api/replication/stream`	Stream chunked WAL frames to connected replicas
`POST`	`/api/replication/ack`	Report follower heartbeat and replayed LSN
`POST`	`/api/replication/promote`	Promote replica to active primary node
`POST`	`/api/replication/demote`	Demote primary node to follower under a new primary

Documentation Suite

LionSQL provides comprehensive documentation covering system architecture, operational runbooks, internal engine specifications, and API guides:

Master Technical Documentation Directory (doc/README.md)

Start here for a complete subject-based directory of all architectural blueprints, internals, and guides.

Backend-as-a-Service (BaaS) & Developer APIs

Official Web SDK & HTML Embedding Guide: Universal zero-dependency client library and HTML embedding patterns for Web, Node.js, Bun, and Deno.
Auto-Generated RESTful CRUD API: Zero-code /api/records/:table endpoints with rich boolean filter expressions.
Webhooks & Row-Level Security (RLS): Non-blocking mutation webhooks with HMAC signatures and declarative @auth access rules.
Cron Jobs Scheduler & SMTP Mailer: Embedded 5-field cron automation and transactional HTML email dispatching.
HTTP REST API & Realtime SSE Specification: OpenAPI-style endpoint documentation and JavaScript EventSource examples.

Core Architecture & Internals Specifications

System Architecture Specification: Exhaustive technical specification covering Volcano iterators, dual-parser decoupling, and storage backends.
Architecture Decision Records (ADRs): Historical log of 18 foundational architectural decisions (ADR-001 through ADR-018).
VDBE Bytecode Virtual Machine Internals: Register allocation, opcode instruction set architecture (ISA), and procedural execution.
Storage Engine Mechanics (WiredTiger & Memory OCC): Lock-free B+Trees, hazard pointers, OCC validation, and AOF log compaction.
Cost-Based Optimizer & Volcano Pipeline Internals: Equi-depth histograms, physical cost formulas, and external merge sort.
Multi-Wire Protocol Internals: Binary framing for PostgreSQL v3, TDS 7.x/8.0, and goroutine connection pooler.
Virtual System Catalog & Data Dictionary: System views (sys.*, information_schema.*), data types, and tool compatibility.
High Availability & Disaster Recovery: Multi-node replication topology, 1-writer multi-reader WAL streaming, failover, and recovery SLAs.
Extension & Driver Development Guide: Dual-track UDFs (Go native SPI + Wasm sandbox), pluggable storage engines, and fallback parsers.

User Guides & Operations

T-SQL & SQL Syntax Reference Guide: Complete language reference for procedures, triggers, UDFs, TVFs, and queries.
Percentile & Quantile Analytics: Continuous/discrete quantiles (PERCENTILE_CONT, PERCENTILE_DISC), MEDIAN, and streaming APPROX_PERCENTILE (T-Digest).
In-Engine Text & Log Analytics: Zero-copy GREP, REGEXP_LIKE, and AWK / SPLIT_PART filter and extraction operators.
Observability, Metrics & Telemetry Guide: Prometheus time-series metrics, health probes, alerting rules, and Grafana integration.
Production Deployment & Operations Runbook: Systemd services, Docker deployment, 1-writer replication failover, and security hardening.
Performance Tuning & Benchmark Guide: High-concurrency banking benchmark harness, TPS measurement, and memory tuning.
Local Testing & Regression Guide: Build and test pipeline, running single tests, build tags, regression test map, and TPC-C performance regression procedure.
Database Migration Guide: Procedures for migrating from PostgreSQL, MSSQL, SQLite, and MySQL.
Security Policy & Threat Model: RBAC access control, SQL injection immunity, and vulnerability disclosure.
Engineering Roadmap & Milestones: Versioned engineering milestones from single-node OLTP to Always On HA and decoupled HTAP.
Actionable Engineering Backlog (TODO.md): Immediate, daily task backlog and prioritized operational execution tracker.
Developer & AI Handover Context Notes: Shared brain, engineering invariants, why alternatives were spec'd out, fragile landmines, and upcoming refactoring context.
Troubleshooting, Error Diagnostics & FAQ: Port conflicts, serialization conflicts, slow query tuning, and client driver setup.
Contributing & Development Guide: Engineering standards, 3-stage verification pipeline, and pull request checklist.
Contributor Covenant Code of Conduct: Standards, pledge, enforcement responsibilities, and guidelines.
Changelog & Release Notes: Semantic versioning history and release notes.

Engineering Quality & Verification Pipeline

LionSQL strictly adheres to a 3-Stage Verification Pipeline for every change:

Compilation (Build):

go build -tags wiredtiger -buildvcs=false -o bin/server ./cmd/server && \
go build -tags wiredtiger -buildvcs=false -o bin/lionsql ./cmd/lionsql && \
go build -tags wiredtiger -buildvcs=false -o bin/bench ./cmd/bench && \
go build -tags wiredtiger -buildvcs=false -o bin/tpcc-runtime ./cmd/tpcc_runtime

Deterministic Race-Free Verification (Test):
```
go test -tags wiredtiger -count=1 -v -race ./...
```
Requires 100% PASS across all packages with 0 data races.
- Extended Integration Smoke Test: Verifies all 13 core architecture domains from notes/TEST_VERIFICATION_REPORT.ko.md in ~3 seconds (see scripts/README.md):
```
# Default run (In-Memory OCC)
./scripts/verify_report.sh

# WiredTiger persistent B+Tree engine run
./scripts/verify_report.sh --engine=wiredtiger
```
Commit Integrity:
- Conventional Commits format (feat, fix, docs, refactor, test).
- Zero decorative emojis in code, logs, comments, and commit messages.

License

Open Source License

LionSQL is free open-source software licensed under the GNU General Public License v3 (GPL-3.0-or-later). See LICENSE for the full canonical license text.

Third-Party Software & Copyright Attribution

LionSQL incorporates or dynamically links with third-party software components under compatible open-source licenses:

WiredTiger Storage Engine:
- Copyright (c) MongoDB, Inc.
- Copyright (c) Keith Bostic and Michael Cahill.
- Licensed under the GNU General Public License (GPLv2 or GPLv3).
- When LionSQL is built with -tags wiredtiger, it links with libwiredtiger governed by its respective GPL terms.

Name		Name	Last commit message	Last commit date
cmd		cmd
doc		doc
grammar		grammar
notes		notes
pkg		pkg
scripts		scripts
sdk		sdk
.gitignore		.gitignore
BUG_ARCHIVE.ko.md		BUG_ARCHIVE.ko.md
CHANGELOG.md		CHANGELOG.md
CODE_OF_CONDUCT.md		CODE_OF_CONDUCT.md
CODE_REVIEW.ko.md		CODE_REVIEW.ko.md
CODE_REVIEW.md		CODE_REVIEW.md
CONTRIBUTING.md		CONTRIBUTING.md
GEMINI.global.md		GEMINI.global.md
GEMINI.md		GEMINI.md
LICENSE		LICENSE
NOTICE		NOTICE
README.ko.md		README.ko.md
README.md		README.md
REFACTORING.ko.md		REFACTORING.ko.md
ROADMAP.md		ROADMAP.md
TODO.md		TODO.md
go.mod		go.mod
go.sum		go.sum

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LionSQL

Overview

Key Features

1. Dual Wire Protocols & Connection Pooling

2. Enterprise T-SQL Procedural Runtime

3. Core Engine & Virtual Machine Architecture

4. High-Performance Storage & ACID Concurrency

5. Web Management Studio & Developer Experience

Quick Start Guide

1. Building from Source

Prerequisites

Build Command

2. Starting the Server

3. Accessing the Web Studio

Client Connectivity

Connecting via psql (PostgreSQL Client)

Connecting via sqlcmd (MSSQL Client)

Bulk Copy Streaming with psql \copy

Application Integration & ORMs

Go (pgx / database/sql)

JavaScript / TypeScript (Official Client SDK)

Python (psycopg2 / SQLAlchemy)

Node.js (pg / Prisma)

Command-Line Interface (CLI) Reference

Configuration Flags

Unified CLI & Daemon Controls

Declarative Schema Migrations CLI (lionsql migrate)

Backup & Restore Operations

HTTP REST API Reference

Documentation Suite

Master Technical Documentation Directory (doc/README.md)

Backend-as-a-Service (BaaS) & Developer APIs

Core Architecture & Internals Specifications

User Guides & Operations

Engineering Quality & Verification Pipeline

License

Open Source License

Third-Party Software & Copyright Attribution

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