Michael McCandless created LUCENE-6006:
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Summary: Replace FieldInfo.normsType with FieldInfo.hasNorms
boolean
Key: LUCENE-6006
URL: https://issues.apache.org/jira/browse/LUCENE-6006
Project: Lucene - Core
Issue Type: Improvement
Reporter: Michael McCandless
Assignee: Michael McCandless
Fix For: 5.0, Trunk
I came across this precursor while working on LUCENE-6005:
I think FieldInfo.normsType can only be null (field did not index
norms) or DocValuesType.NUMERIC (it did). I'd like to simplify to
just boolean hasNorms.
This is a strange boolean, though: in theory it should be derived from
{{indexed && omitNorms == false}}, but we have it for the exceptions
case where every document in a segment hit an exception and never
added norms. I think this is the only reason it exists? (In theory,
such cases should result in 100% deleted segments, which IW should
then drop ... but seems dangerous to "rely" on that).
So I changed the indexing chain to just fill in the default (0) norms
for all documents in such exceptional cases; this way going forward
(starting with 5.0 indices) we really don't need this hasNorms. But
we still need it for pre-5.0 indices...
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