bcp

0.2.2 • Public • Published

node-bcp

A node.js wrapper for the SQL Server bcp utility which allows for bulk insert and export operations.

Install

npm install bcp

You will need the bcp utility installed on your system. If you're running on Windows and use SQL Server, you probably already have this. On Linux, you can use Microsoft's ODBC Driver for Linux which comes includes the bcp utility. On OSX, sorry, better luck next time.

This library does not support FreeTDS's reimplementation called freebcp. Their implementation is very incomplete and differs enough from the Microsoft version

Bulk Import Example

Imagine we have this table:

MyDatabase.dbo.MyTable

Column Type
Id Int Identity
MyDate DateTime
MyFloat Float
MyString NVarChar(50)
var Bcp = require('bcp');
 
// Initialize a Bcp object with settings like connection info, database, encoding, etc.
var b = new Bcp({
  user: 'login_name',
  password: 'password',
  database: 'MyDatabase',
  fieldTerminator: '\t::\t', // make sure to pick a character sequence not found in your data
  rowTerminator: '\t::\n',
  unicode: true,
  checkConstraints: true
});
 
// now, prepare a bulk insert. Notice how we excluded the Id column because it's an identity 
// and it would be ignored anyway, unless we set useIdentity: true. All columns in the table, 
// but not listed in the column list here will be inserted as NULL
// The column names do not need to match the same casing as the SQL Server columns, but they 
// must match the properties of the objects passed to writeRows(). Column order is insignificant.
b.prepareBulkInsert('MyTable', ['myDate', 'myFloat', 'myString'], function (err, imp) {
  if (err)
    // ...
  
  // the imp object is an ImportFile object which you can write to
  imp.writeRows([
    { myDate: new Date(), myFloat: 23.7, myString: 'hello' },
    { myDate: new Date('2014-09-01'), myFloat: 7.23, myString: 'world' }
  ]);
  
  // you can call writeRows() as many times as you'd like. It writes to a file stream.
  
  // if you decide you don't want to use this bulk insert, call cancel in order to delete 
  // temporary the data file
  // imp.cancel();
  
  // when you're done writing rows, execute the bulk insert
  imp.execute(function (error)
  {
    if (error)
      // ...
  });
});

Bulk Export Example

var b = new Bcp({
  user: 'login_name',
  password: 'password',
  database: 'MyDatabase',
  checkConstraints: false,
  unicode: false,
  native: true // if need native data format.
});
 
var customOptions = {
  read: false,
  keepFiles: true,
  sql: 'select * from MyDatabase.dbo.MyTable where id = 1' // if need select query, do like this.
};
 
b.bulkExport(tablename, customOptions, function (err) {
 
});

For a full description of all of the options which can be passed to the Bcp constructor, see lib/Bcp.js and Microsoft's bcp documentation.

Other Notes

This library is incomplete, and not very well tested. It needs lots more documentation, features, better error reporting, and love. Bulk Export is partially implemented, but there are no examples yet. Use at your own risk. May cause drowsiness and irritability.

Install

npm i bcp

DownloadsWeekly Downloads

677

Version

0.2.2

License

MIT

Last publish

Collaborators

  • ak103
  • bretcope
  • rossipedia