function schemas(connection) {
    const sqlStatement = `${SHOW_SCHEMA_QUERY} = '${connection.database}'` ;
    return query(sqlStatement, connection);
}
Should return a list of tables and their columns that are defined within the database.
@param {object} connection - Connection parameters
@param {string} connection.accessKey - AWS Access Key
@param {string} connection.secretAccessKey - AWS Secret Key
@param {string} connection.region - AWS Region
@param {string} connection.database - Database name to connect to
@param {string} connection.outputS3Bucket - Location will Athena will output resutls of query
@returns {Promise} that resolves to { columnnames, rows }