1Lucy::Index::PolyReaderU(s3e)r Contributed Perl DocumentaLtuicoyn::Index::PolyReader(3)
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NAME

6       Lucy::Index::PolyReader - Multi-segment implementation of IndexReader.
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SYNOPSIS

9           my $polyreader = Lucy::Index::IndexReader->open(
10               index => '/path/to/index',
11           );
12           my $doc_reader = $polyreader->obtain("Lucy::Index::DocReader");
13           for my $doc_id ( 1 .. $polyreader->doc_max ) {
14               my $doc = $doc_reader->fetch_doc($doc_id);
15               print " $doc_id: $doc->{title}\n";
16           }
17

DESCRIPTION

19       PolyReader conflates index data from multiple segments.  For instance,
20       if an index contains three segments with 10 documents each,
21       PolyReaderXs doc_max() method will return 30.
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23       Some of PolyReaderXs DataReader components may be less efficient or
24       complete than the single-segment implementations accessed via
25       SegReader.
26

METHODS

28   doc_max
29           my $int = $poly_reader->doc_max();
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31       Return the maximum number of documents available to the reader, which
32       is also the highest possible internal document id.  Documents which
33       have been marked as deleted but not yet purged from the index are
34       included in this count.
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36   doc_count
37           my $int = $poly_reader->doc_count();
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39       Return the number of documents available to the reader, subtracting any
40       that are marked as deleted.
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42   del_count
43           my $int = $poly_reader->del_count();
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45       Return the number of documents which have been marked as deleted but
46       not yet purged from the index.
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48   offsets
49           my $i32_array = $poly_reader->offsets();
50
51       Return an array with one entry for each segment, corresponding to
52       segment doc_id start offset.
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54   seg_readers
55           my $arrayref = $poly_reader->seg_readers();
56
57       Return an array of all the SegReaders represented within the
58       IndexReader.
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INHERITANCE

61       Lucy::Index::PolyReader isa Lucy::Index::IndexReader isa
62       Lucy::Index::DataReader isa Clownfish::Obj.
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66perl v5.28.0                      2018-07-14        Lucy::Index::PolyReader(3)
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