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Posted to issues@lucene.apache.org by "wuda (Jira)" <ji...@apache.org> on 2021/07/24 15:40:00 UTC
[jira] [Created] (LUCENE-10035) Simple text codec add multi level
skip list data
wuda created LUCENE-10035:
-----------------------------
Summary: Simple text codec add multi level skip list data
Key: LUCENE-10035
URL: https://issues.apache.org/jira/browse/LUCENE-10035
Project: Lucene - Core
Issue Type: New Feature
Components: core/codecs
Affects Versions: main (9.0)
Reporter: wuda
Simple text codec add skip list data( include impact) to help understand index format，For debugging, curiosity, transparency only!! When term's docFreq greater than or equal to SimpleTextSkipWriter.BLOCK_SIZE (default value is 8), Simple text codec will write skip list, the *.pst (simple text term dictionary file)* file will looks like this
{code:java}
field title
term args
doc 2
freq 2
pos 7
pos 10
## we omit docs for better view ......
doc 98
freq 2
pos 2
pos 6
skipList
?
level 1
skipDoc 65
skipDocFP 949
impacts
impact
freq 1
norm 2
impact
freq 2
norm 12
impact
freq 3
norm 13
impacts_end
?
level 0
skipDoc 17
skipDocFP 284
impacts
impact
freq 1
norm 2
impact
freq 2
norm 12
impacts_end
skipDoc 34
skipDocFP 624
impacts
impact
freq 1
norm 2
impact
freq 2
norm 12
impact
freq 3
norm 14
impacts_end
skipDoc 65
skipDocFP 949
impacts
impact
freq 1
norm 2
impact
freq 2
norm 12
impact
freq 3
norm 13
impacts_end
skipDoc 90
skipDocFP 1311
impacts
impact
freq 1
norm 2
impact
freq 2
norm 10
impact
freq 3
norm 13
impact
freq 4
norm 14
impacts_end
END
checksum 00000000000829315543
{code}
compare with previous，we add *skipList，level, skipDoc, skipDocFP, impacts, impact, freq, norm* nodes, at the same, simple text codec can support advanceShallow when search time.
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