[jira] [Created] (LUCENE-10039) With a single field, CombinedFieldQuery can score incorrectly

["Julie Tibshirani (Jira)" <ji...@apache.org>]

Julie Tibshirani created LUCENE-10039:
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             Summary: With a single field, CombinedFieldQuery can score incorrectly
                 Key: LUCENE-10039
                 URL: https://issues.apache.org/jira/browse/LUCENE-10039
             Project: Lucene - Core
          Issue Type: Bug
            Reporter: Julie Tibshirani


When there's only one field, {{CombinedFieldQuery}} will ignore its weight while scoring. This makes the scoring inconsistent, since the field weight is supposed to multiply its term frequency.

This can also come up when searching over multiple fields, when some segment happens to contain only one field. The problem was caught by this test:

{code}
ant test  -Dtestcase=TestCombinedFieldQuery -Dtests.method=testCopyFieldWithMissingFields -Dtests.seed=8FA982798BC8FEF6 -Dtests.nightly=true
{code}



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