// Check two things:
// 1. result list contains expected values
// 2. result list is sorted properly
Scan scan = new Scan();
Filter filter = new SingleColumnValueExcludeFilter(cf_essential, col_normal,
CompareOp.NOT_EQUAL, filtered_val);
scan.setFilter(filter);
scan.setLoadColumnFamiliesOnDemand(true);
InternalScanner s = region.getScanner(scan);