Redshift data access from node jdbc - node.js

Question

I am getting below error when I try to data from redshift with the below mentioned code
var jdbc = new ( require('jdbc') );
var config = {
libpath: 'C:/Users/ABCD/Desktop/jar/RedshiftJDBC41-1.1.6.1006.jar',
//libs: [__dirname + 'path/to/other/jars.jar'],
drivername: 'com.amazon.redshift.jdbc41.Driver',
url: 'jdbc:redshift://examplecluster.abc123xyz789.us-west-2.redshift.amazonaws.com:5439/dev',
user: 'xxxx',
password: 'xxxxx'
};
jdbc.initialize(config, function(err, res) {
if (err) {
console.log(err);
}
});
var genericQueryHandler = function(err, results) {
if (err) {
console.log(err);
} else if (results) {
console.log(results);
}
jdbc.close(function(err) {
if(err) {
console.log(err);
} else {
console.log("Connection closed successfully!");
}
});
};
jdbc.open(function(err, conn) {
if (conn) {
// SELECT statements are called with executeQuery
jdbc.executeQuery("select * from information_schema.tables", genericQueryHandler);
}
});
Error:
C:\Users\ABCD> node redshift.js
C:\Users\ABCD\node_modules\jdbc\lib\jdbc.js:62>
if(this._props.getPropertySync('user') === undefined){>
^ TypeError: undefined is not a function
at JDBCConn.initialize
(C:\Users\ABCD\node_modules\jdbc\lib\jdbc.js:62:20)
at Object.<anonymous>
(C:\Users\ABCD\Desktop\AngularJS\redshift.js:15:6)
at Module._compile (module.js:460:26)
at Object.Module._extensions..js (module.js:478:10)
at Module.load (module.js:355:32)
at Function.Module._load (module.js:310:12)
at Function.Module.runMain (module.js:501:10)
at startup (node.js:129:16)
at node.js:814:3
Could you please let me know whether there is nay issue with the above mentioned node jdbc usage for redshift?

Answer 1

Please be aware that this answer applies to node-jdbc 0.0.15 and earlier only. It will not work for node-jdbc 0.1.1 or later, as the API has been completely reworked and is not backwards-compatible.
Try replacing the two lines in your configuration
user: 'xxxx',
password: 'xxxxx'
with
properties: [
['user', 'xxxx'],
['password', 'xxxxx']
]
I got the same error as you attempting to use Node to connect to a local Oracle XE database. After making the change above I was able to connect. I don't believe the error you are getting is specific to RedShift - I believe it affects all databases.
Note that the properties above have to be specified as an array of 2-element arrays. An object such as the following would seem the obvious way to specify the properties, but it doesn't work:
// Don't do this, it doesn't work.
properties: {
user: 'xxxx',
password: 'xxxxx'
}
To be honest, the fix I've proposed above is a workaround. I only found it by reading the source of the jdbc module. I can't say I'm terribly impressed with this module, what with the example code given in the documentation not working, and with a somewhat counter-intuitive and undocumented format for specifying custom properties.