techno.blog("Dion")

A new bug fix release of Lucene has been announced.

Check out the Changes in Apache Lucene 1.4.2.

1. Fixed bug #31241: Sorting could lead to incorrect results (documents
missing, others duplicated) if the sort keys were not unique and there
were more than 100 matches. (Daniel Naber)

2. Memory leak in Sort code (bug #31240) eliminated.
(Rafal Krzewski via Christoph and Daniel)

3. FuzzyQuery now takes an additional parameter that specifies the
minimum similarity that is required for a term to match the query.
The QueryParser syntax for this is term~x, where x is a floating
point number between 0 and 1 (a bigger number means that a higher
similarity is required). Furthermore, a prefix can be specified
for FuzzyQuerys so that only those terms are considered similar that
start with this prefix. This can speed up FuzzyQuery greatly.
(Daniel Naber, Christoph Goller)

4. PhraseQuery and PhrasePrefixQuery now allow the explicit specification
of relative positions. (Christoph Goller)

5. QueryParser changes: Fix for ArrayIndexOutOfBoundsExceptions
(patch #9110); some unused method parameters removed; The ability
to specify a minimum similarity for FuzzyQuery has been added.
(Christoph Goller)

6. IndexSearcher optimization: a new ScoreDoc is no longer allocated
for every non-zero-scoring hit.  This makes 'OR' queries that
contain common terms substantially faster.  (cutting)