bsglz commented on PR #5171:
URL: https://github.com/apache/hbase/pull/5171#issuecomment-1503381441
Checked the code, the bloom filter use empty family both in storing and
checking, so seems ok.
```
case ROWCOL:
if (!scan.isGetScan()) {
return true;
}
if (columns != null && columns.size() == 1) {
byte[] column = columns.first();
// create the required fake key
Cell kvKey = PrivateCellUtil.createFirstOnRow(row,
HConstants.EMPTY_BYTE_ARRAY, column);
return passesGeneralRowColBloomFilter(kvKey);
}
// For multi-column queries the Bloom filter is checked from the
// seekExact operation.
return true;
```
```
/**
* An hash key for ROWCOL bloom. This assumes the cells to be serialized in
the Keyvalue
* serialization format with Empty column family. Note that the byte
representing the family length
* is considered to be 0
*/
@InterfaceAudience.Private
public class RowColBloomHashKey extends CellHashKey {
```
BTW, the method of checkGeneralBloomFilter use CellComparator.getInstance()
directly which return CellComparatorImpl, will change them later.
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