Pass word along with counts to posting list reader.

searchlib/src/vespa/searchlib/diskindex/fieldreader.cpp

@@ -53,7 +53,7 @@ FieldReader::readCounts()
 {
  PostingListCounts counts;
  _dictFile->readWord(_word, _oldWordNum, counts);
- _oldposoccfile->readCounts(counts);
+ _oldposoccfile->read_word_and_counts(_word, counts);
  if (_oldWordNum != noWordNumHigh()) {
  _wordNum = _wordNumMapper.map(_oldWordNum);
  assert(_wordNum != noWordNum());

searchlib/src/vespa/searchlib/diskindex/zc4_posting_reader.cpp

@@ -90,9 +90,9 @@ Zc4PostingReader<bigEndian>::read_word_start()
 
 template <bool bigEndian>
 void
-Zc4PostingReader<bigEndian>::set_counts(const PostingListCounts &counts)
+Zc4PostingReader<bigEndian>::set_word_and_counts(const std::string& word, const index::PostingListCounts& counts)
 {
- Zc4PostingReaderBase::set_counts(*_decodeContext, counts);
+ Zc4PostingReaderBase::set_word_and_counts(*_decodeContext, word, counts);
 }
 
 template <bool bigEndian>

searchlib/src/vespa/searchlib/diskindex/zc4_posting_reader.h

@@ -34,7 +34,7 @@ class Zc4PostingReader : public Zc4PostingReaderBase
  Zc4PostingReader &operator=(Zc4PostingReader &&) = delete;
  ~Zc4PostingReader();
  void read_doc_id_and_features(index::DocIdAndFeatures &features);
- void set_counts(const index::PostingListCounts &counts);
+ void set_word_and_counts(const std::string& word, const index::PostingListCounts& counts);
  void set_decode_features(DecodeContext *decode_features);
  DecodeContext &get_decode_features() const { return *_decodeContext; }
 };

searchlib/src/vespa/searchlib/diskindex/zc4_posting_reader_base.cpp

@@ -190,6 +190,7 @@ Zc4PostingReaderBase::Zc4PostingReaderBase(bool dynamic_k)
  _l4_skip(),
  _chunkNo(0),
  _features_size(0),
+ _word(),
  _counts(),
  _residue(0)
 {
@@ -295,9 +296,10 @@ Zc4PostingReaderBase::read_word_start(DecodeContext64Base &decode_context)
 }
 
 void
-Zc4PostingReaderBase::set_counts(DecodeContext64Base &decode_context, const PostingListCounts &counts)
+Zc4PostingReaderBase::set_word_and_counts(bitcompression::DecodeContext64Base &decode_context, const std::string& word, const index::PostingListCounts &counts)
 {
  assert(!_has_more && _residue == 0); // Previous words must have been read.
+ _word = word;
  _counts = counts;
  assert((_counts._numDocs == 0) == (_counts._bitLength == 0));
  if (_counts._numDocs > 0) {

searchlib/src/vespa/searchlib/diskindex/zc4_posting_reader_base.h

@@ -110,6 +110,7 @@ class Zc4PostingReaderBase
 
  // Variable for validating chunk information while reading
  uint64_t _features_size;
+ std::string _word;
  index::PostingListCounts _counts;
 
  uint32_t _residue; // Number of unread documents after word header
@@ -124,7 +125,7 @@ class Zc4PostingReaderBase
  Zc4PostingReaderBase &operator=(Zc4PostingReaderBase &&) = delete;
  ~Zc4PostingReaderBase();
  void read_doc_id_and_features(index::DocIdAndFeatures &features);
- void set_counts(bitcompression::DecodeContext64Base &decode_context, const index::PostingListCounts &counts);
+ void set_word_and_counts(bitcompression::DecodeContext64Base &decode_context, const std::string& word, const index::PostingListCounts& counts);
  ComprFileReadContext &get_read_context() { return _readContext; }
  Zc4PostingParams &get_posting_params() { return _posting_params; }
 };

searchlib/src/vespa/searchlib/diskindex/zcposting.cpp

@@ -57,9 +57,9 @@ Zc4PostingSeqRead::readDocIdAndFeatures(DocIdAndFeatures &features)
 }
 
 void
-Zc4PostingSeqRead::readCounts(const PostingListCounts &counts)
+Zc4PostingSeqRead::read_word_and_counts(const std::string& word, const PostingListCounts& counts)
 {
- _reader.set_counts(counts);
+ _reader.set_word_and_counts(word, counts);
 }
 
 

searchlib/src/vespa/searchlib/diskindex/zcposting.h

@@ -37,7 +37,7 @@ class Zc4PostingSeqRead : public index::PostingListFileSeqRead
  using PostingListParams = index::PostingListParams;
 
  void readDocIdAndFeatures(DocIdAndFeatures &features) override;
- void readCounts(const PostingListCounts &counts) override; // Fill in for next word
+ void read_word_and_counts(const std::string& word, const PostingListCounts &counts) override; // Fill in for next word
  bool open(const std::string &name, const TuneFileSeqRead &tuneFileRead) override;
  bool close() override;
  void getParams(PostingListParams &params) override;

searchlib/src/vespa/searchlib/index/postinglistfile.h

@@ -34,7 +34,7 @@ class PostingListFileSeqRead {
  /**
  * Read counts for a word.
  */
- virtual void readCounts(const PostingListCounts &counts) = 0;
+ virtual void read_word_and_counts(const std::string& word, const PostingListCounts& counts) = 0;
 
  /**
  * Open posting list file for sequential read.

searchlib/src/vespa/searchlib/test/fakedata/fakezcfilterocc.cpp

@@ -224,7 +224,7 @@ FakeZcFilterOcc::validate_read(const FakeWord &fw) const
  PostingListCounts counts;
  counts._bitLength = _compressedBits;
  counts._numDocs = _hitDocs;
- reader.set_counts(counts);
+ reader.set_word_and_counts(fw.getName(), counts);
  auto word_pos_iterator(fw._wordPosFeatures.begin());
  auto word_pos_iterator_end(fw._wordPosFeatures.end());
  DocIdAndPosOccFeatures check_features;