TermOrdVal/DocValuesComparator does too much work in compareBottom
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Key: LUCENE-3824
URL: https://issues.apache.org/jira/browse/LUCENE-3824
Project: Lucene - Java
Issue Type: Improvement
Reporter: Michael McCandless
Assignee: Michael McCandless
Priority: Minor
Fix For: 3.6, 4.0
We now have logic to fall back to by-value comparison, when the bottom
slot is not from the current reader.
But this is silly, because if the bottom slot is from a different
reader, it means the tie-break case is not possible (since the current
reader didn't have the bottom value), so when the incoming ord equals
the bottom ord we should always return x > 0.
I added a new random string sort test case to TestSort...
I also renamed DocValues.SortedSource.getByValue -> getOrdByValue and
cleaned up some whitespace.
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