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check for early exit on max expansions on multi suffix terms with prefix, and handle no terms provided

This commit is contained in:
kimchy 2011-05-13 13:17:24 +03:00
parent f659ecc88b
commit e4aee9cfbc
1 changed files with 6 additions and 0 deletions
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6
modules/elasticsearch/src/main/java/org/elasticsearch/common/lucene/search/MultiPhrasePrefixQuery.java
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@ -125,6 +125,9 @@ public class MultiPhrasePrefixQuery extends Query {
}
@Override public Query rewrite(IndexReader reader) throws IOException {
if (termArrays.isEmpty()) {
return MatchNoDocsQuery.INSTANCE;
}
MultiPhraseQuery query = new MultiPhraseQuery();
query.setSlop(slop);
int sizeMinus1 = termArrays.size() - 1;
@ -136,6 +139,9 @@ public class MultiPhrasePrefixQuery extends Query {
List<Term> terms = new ArrayList<Term>();
for (Term term : suffixTerms) {
getPrefixTerms(terms, term, reader);
if (terms.size() > maxExpansions) {
break;
}
}
if (terms.isEmpty()) {
return MatchNoDocsQuery.INSTANCE;