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-- E-commerce database schema for NL2SQL-Bench
-- Designed for in-memory SQLite: realistic, universally understood domain.
CREATE TABLE IF NOT EXISTS categories (
id INTEGER PRIMARY KEY,
name TEXT NOT NULL UNIQUE
);
CREATE TABLE IF NOT EXISTS products (
id INTEGER PRIMARY KEY,
name TEXT NOT NULL,
category_id INTEGER NOT NULL REFERENCES categories(id),
price REAL NOT NULL CHECK(price >= 0),
stock_quantity INTEGER NOT NULL DEFAULT 0
);
CREATE TABLE IF NOT EXISTS customers (
id INTEGER PRIMARY KEY,
name TEXT NOT NULL,
email TEXT NOT NULL UNIQUE,
country TEXT NOT NULL,
tier TEXT NOT NULL DEFAULT 'bronze' -- bronze | silver | gold
CHECK(tier IN ('bronze', 'silver', 'gold')),
created_at TEXT NOT NULL -- ISO-8601 date string
);
CREATE TABLE IF NOT EXISTS orders (
id INTEGER PRIMARY KEY,
customer_id INTEGER NOT NULL REFERENCES customers(id),
status TEXT NOT NULL DEFAULT 'pending'
CHECK(status IN ('pending','processing','shipped','delivered','cancelled')),
created_at TEXT NOT NULL,
total_amount REAL NOT NULL CHECK(total_amount >= 0)
);
CREATE TABLE IF NOT EXISTS order_items (
id INTEGER PRIMARY KEY,
order_id INTEGER NOT NULL REFERENCES orders(id),
product_id INTEGER NOT NULL REFERENCES products(id),
quantity INTEGER NOT NULL CHECK(quantity > 0),
unit_price REAL NOT NULL CHECK(unit_price >= 0)
);
CREATE TABLE IF NOT EXISTS reviews (
id INTEGER PRIMARY KEY,
product_id INTEGER NOT NULL REFERENCES products(id),
customer_id INTEGER NOT NULL REFERENCES customers(id),
rating INTEGER NOT NULL CHECK(rating BETWEEN 1 AND 5),
created_at TEXT NOT NULL
);
-- Indexes for common join/filter patterns
CREATE INDEX IF NOT EXISTS idx_products_category ON products(category_id);
CREATE INDEX IF NOT EXISTS idx_orders_customer ON orders(customer_id);
CREATE INDEX IF NOT EXISTS idx_orders_status ON orders(status);
CREATE INDEX IF NOT EXISTS idx_orders_created ON orders(created_at);
CREATE INDEX IF NOT EXISTS idx_order_items_order ON order_items(order_id);
CREATE INDEX IF NOT EXISTS idx_order_items_product ON order_items(product_id);
CREATE INDEX IF NOT EXISTS idx_reviews_product ON reviews(product_id);
CREATE INDEX IF NOT EXISTS idx_customers_country ON customers(country);
CREATE INDEX IF NOT EXISTS idx_customers_tier ON customers(tier);
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