David Smiley created LUCENE-4562:
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Summary: Pair-wise FST key comparator by ords
Key: LUCENE-4562
URL: https://issues.apache.org/jira/browse/LUCENE-4562
Project: Lucene - Core
Issue Type: New Feature
Components: core/FSTs
Reporter: David Smiley
Priority: Minor
It would be useful to have an FST utility method to do a compare() operation
between a key in one FST and a key in a second FST, by ords instead of the
keys. So the input is the ord for FST1 and an ord for FST2 and the output is
-1, 0, 1. The result is the same as if you were to do a Util.getByOutput for
both ords against their respective FSTs then compare the resulting byte arrays.
The point of this is to speedup LUCENE-3729 further, which impact sorting
across segments. I would be surprised if it doesn't have applicability to
other problems.
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