function startQuery(athenaClient, params) {
    const client = athenaClient;

    const queryParams = {
        QueryString: params.sqlStatement,
        ResultConfiguration: {
          OutputLocation: params.outputS3Bucket,
          EncryptionConfiguration: {
            EncryptionOption: 'SSE_S3'
          }
        },
        QueryExecutionContext: {
          Database: params.database
        }
    };
    return new Promise(function(resolve, reject) {
        return client.startQueryExecution(queryParams, (err, data) => {
            if (err) {
                Logger.log(`Unexpected Error starting Athena Query ${err}`);
                return reject(err);
            }
                const queryId = data.QueryExecutionId;
                return resolve(queryId);
          });
    });
}
The following method will execute the sql statement to query the
athena database
@param {object} athenaClient  - Object created using create athena client
@param {object} params - Connection Parameters
@param {string} params.database - Database name to connect to
@param {string} params.sqlStatement - SQL statement to execute
@param {string} params.outputS3Bucket - Location will Athena will output resutls of query
@return {string} requestId