| java.lang.Object
 org.apache.solr.search.LuceneQueryOptimizer
| LuceneQueryOptimizer | | class LuceneQueryOptimizer (Code) | | Utility which converts certain query clauses into
QueryFilter s and
caches these. Only required
TermQuery s whose boost is zero and
whose term occurs in at least a certain fraction of documents are converted
to cached filters. This accellerates query constraints like language,
document format, etc., which do not affect ranking but might otherwise slow
search considerably.
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| Constructor Summary | |
| public | LuceneQueryOptimizer(int cacheSize, float threshold)
Construct an optimizer that caches and uses filters for required
TermQuery s whose boost is zero. |
| Method Summary | |
| public TopDocs | optimize(BooleanQuery original, Searcher searcher, int numHits, Query[] queryOut, Filter[] filterOut)
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| LuceneQueryOptimizer | | public LuceneQueryOptimizer(int cacheSize, float threshold)(Code) | | Construct an optimizer that caches and uses filters for required
TermQuery s whose boost is zero.
Parameters:
cacheSize - the number of QueryFilters to cache
Parameters:
threshold - the fraction of documents which must contain term |
| optimize | | public TopDocs optimize(BooleanQuery original, Searcher searcher, int numHits, Query[] queryOut, Filter[] filterOut) throws IOException(Code) | | |
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