CREATE TABLE IF NOT EXISTS suppliers (
  id SERIAL PRIMARY KEY,
  name VARCHAR(255) NOT NULL,
  code VARCHAR(50) UNIQUE NOT NULL,
  email VARCHAR(255),
  phone VARCHAR(50),
  address TEXT,
  contact_person VARCHAR(255),
  notes TEXT,
  created_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
  updated_at TIMESTAMP WITH TIME ZONE DEFAULT NOW()
);

CREATE INDEX IF NOT EXISTS idx_suppliers_code ON suppliers(code);
CREATE INDEX IF NOT EXISTS idx_suppliers_name ON suppliers(name);