docs: function exec(sqlQuery, poolName) {
    return new Promise((resolve, reject) => {
      db.connect((err, client, done) => {
        if (err) {
          reject(err);
        }
        client.query(sqlQuery, (err, results) => {
          if (err) {
            reject(err);
          }
          resolve(results);
        });
      }, poolName || 'default', );
    });
  }