var q = datasources.db.example_data.book_nodes.createSelect()
 q.result.addPk()
 q.where.add(q.columns.label_text.not.isin(null))
 datasources.db.example_data.book_nodes.getFoundSet().loadRecords(q)

var q = datasources.db.example_data.book_nodes.createSelect('b')
 q.result.addPk()
 q.where.add(q.columns.label_text.isin('select comment_text from book_text t where t.note_text = ? and t.node_id = b.node_id', ['test']))
 datasources.db.example_data.book_nodes.getFoundSet().loadRecords(q)

datasources.db.example_data.orders.getDataSource() // returns 'db:/example_data/orders'

var fs = datasources.db.example_data.orders.getFoundSet()
var ridx = fs.newRecord()
var record = fs.getRecord(ridx)
record.emp_name = 'John'
databaseManager.saveData()

var fs = datasources.db.example_data.orders.getFoundSet('myname')
var ridx = fs.newRecord()
var record = fs.getRecord(ridx)
record.emp_name = 'John'
databaseManager.saveData()