Node-mysql2: this.connection.release is not a function

[gajus]

The following is producing an error:

import mysql from 'mysql2/promise';

const createConnection = () => {
  return mysql.createConnection({
    database: databaseDatabase,
    host: databaseHost,
    password: databasePassword,
    user: databaseUser
  });
};

const audit = async () => {
  const connection = await createConnection();

  connection.release();
};

audit();

TypeError: this.connection.release is not a function
    at PromiseConnection.release (/Users/gajus/Documents/dev/applaudience/showtime-data-sources-auditor/node_modules/mysql2/promise.js:25:19)
    at /Users/gajus/Documents/dev/applaudience/showtime-data-sources-auditor/src/bin/server.js:69:14
    at Generator.next (<anonymous>)
    at step (/Users/gajus/Documents/dev/applaudience/showtime-data-sources-auditor/src/bin/server.js:17:191)
    at /Users/gajus/Documents/dev/applaudience/showtime-data-sources-auditor/src/bin/server.js:17:361
    at process._tickDomainCallback (internal/process/next_tick.js:129:7)

[gajus]

I must be overlooking something, but I don't see what – it looks like this.connection.release is undefined.

[gajus]

There is no release method on Connection constructor.

https://github.com/sidorares/node-mysql2/blob/e81dbf6b543d0c4f700abc78b908f24fe9d34b89/lib/connection.js

[gajus]

Oh, silly me – release is for connection pooling. I need .close().