Function cancel

cf/src/index.js:351–364

(query)

  }

  function cancel(query) {
    return new Promise((resolve, reject) => {
      query.state
        ? query.active
          ? Connection(options).cancel(query.state, resolve, reject)
          : query.cancelled = { resolve, reject }
        : (
          queries.remove(query),
          query.cancelled = true,
          query.reject(Errors.generic('57014', 'canceling statement due to user request')),
          resolve()
        )
    })
  }

  async function end({ timeout = null } = {}) {
    if (ending)