function getSampleQuery() {
  rows = [];
  for (var i = 0; i < ROW_COUNT; ++i) {
    var job = lf.testing.hrSchemaSampleData.generateSampleJobData(db);
    job.setId('jobId' + i.toString());
    rows.push(job);
  }
  return /** @type {!lf.query.InsertBuilder} */ (
      db.insert().into(j).values(rows)).getTaskItem();
}
Creates a physical plan that inserts ROW_COUNT rows into the Album table.
@return {!lf.proc.TaskItem}