athena-client - a nodejs simple aws athena client

Install with:

npm install athena-client

Usage Example

var credentials = {
    accessKeyId: 'xxxx',
    secretAccessKey: 'xxxx',
    region: 'xxxx',
}
var config = {
    bucketUri: 's3://xxxx'
}
 
var Athena = require("athena-client")
var client = Athena.Client(credentials, config)
 
client.execute('SELECT 1', function(err, data) {
    if (err) {
        return console.error(err)
    }
    console.log(data)
})
 
// You can also execute query with promises
client.execute('SELECT 1').then(function(data) {
    console.log(data)
}).catch(function(err) {
    console.error(err)
})

API

athena = require("athena-client")

This module exposes the Client method, which execute query to AWS Athena

client = athena.Client([credentials], [config])

Returns a client instance attached to the account specified by the given credentials and config.

The credentials can be specified as an object with accessKeyId and secretAccessKey and region members such as the following:

var credentials = {
    accessKeyId: 'xxxx',
    secretAccessKey: 'xxxx',
    region: 'xxxx',
}

config object properties

| Property | Default | Description | |-----------|-----------|-------------| | bucketUrl | Required | URI of S3 bucket for saving a query results file(.csv) and a metadata file (.csv.metadata) | | pollingInterval | 1000 | Interval of polling sql results (ms) | | queryTimeout | 0 | Timeout of query execution. 0 is no timeout | | format | 'array' | If 'array', the result of the query is as the following [ { _col0: '1' } , { _col0: '2' }] . If 'raw', the result of query is same with aws-sdk | | concurrentExecMax | 5 | The number of cuncurrent execution of query max. it should be set smaller than AWS Service limit(default is 5) |

client.execute([query], [options], [callback])

Returns query result. The options can be specified as an object with timeout and format members such as the following:

var options = {
    timeout: 3000,
    format: 'raw',
}

client.execute('SELECT 1', function(err, data) {
    if (err) {
        return console.error(err)
    }
    console.log(data)
})

client.execute('SELECT 1', {timeout: 3000}, function(err, data) {
    if (err) {
        return console.error(err)
    }
    console.log(data)
})

client.execute('SELECT 1').then(function(data) {
    console.log(data)
}).catch(function(err) {
    console.error(err)
})