function testExec_UnboundPredicateThrows() {
  var emp = db.getSchema().getEmployee();
  var query = new lf.query.SelectBuilder(hr.db.getGlobal(), [emp.jobId]);
  return lf.testing.util.assertPromiseReject(
      501,  // 501: Value is not bounded.
      query.from(emp).where(emp.jobId.eq(lf.bind(0))).exec());
}
Tests that unbound parameterized search condition will throw.
@return {!IThenable}