class Singleton {
    static #instance: Singleton;

    /**
     * The Singleton's constructor should always be private to prevent direct
     * construction calls with the `new` operator.
     */
    private constructor() { }

    /**
     * The static getter that controls access to the singleton instance.
     *
     * This implementation allows you to extend the Singleton class while
     * keeping just one instance of each subclass around.
     */
    public static get instance(): Singleton {


//MySQL create connection with( pooling? ) would be here ?
        if (!Singleton.#instance) {
            Singleton.#instance = new Singleton();
        }

        return Singleton.#instance;
    }


}

let queryClient; // is saved inside a variable
if (!queryClient)
    queryClient = postgres(getDbConnectionString());

export const db = drizzle(queryClient, {schema}); // <--- this will be used to access the db.