Hi,
I am new to Lucene & am using Lucene 1.9.1. Frequently I get a ParseException
due to "Too many boolean clauses".
The lucene documents that I have created have three fields "userID", "desc" and
"codes". I need to find the information pertaing a set of users whose
description contains a given search text and also relates to a set of codes
(each user has multiple codes associated with him/her). The code (programming
code) I have is as below:
private Hits performSearch(String userIds, String srchText, String codes) {
QueryParser queryParser;
Query userInNtwkQuery = null;
Query codeQuery = null;
Query keywordQuery = null;
BooleanQuery booleanQuery = new BooleanQuery();
queryParser = new QueryParser("userID",
new StandardAnalyzer());
userInNtwkQuery = queryParser.parse(userIds);
booleanQuery.add(userInNtwkQuery, BooleanClause.Occur.MUST);
queryParser = new QueryParser(
"searchData",
new StandardAnalyzer());
keywordQuery = queryParser.parse(srchText);
booleanQuery.add(keywordQuery, BooleanClause.Occur.MUST);
queryParser = new QueryParser("codes",
new StandardAnalyzer());
codeQuery = queryParser.parse(codes);
booleanQuery.add(codeQuery, BooleanClause.Occur.MUST);
return idxSearcher.search(booleanQuery);
}
The first argument of the "performSearch" method 'userIDs' is a String value
containing user-ids delimited by space (for e.g. "1 4 7 1100 99 887") and there
is a possibility of the number of user-ids being as high as 15000. The second
argument 'srchText' can be any free text up to a max of 10 words and the third
argument 'codes' is a String value containing codes delimited by space (for
e.g. "00544 11744 11743"), the number of codes could as high as 1500 to 2000
codes for a single search.
As the number userIDs and/or codes per search is exceeding the lucene default
limit of 1024 boolean clauses I am facing the problem of 'Too many boolean
clauses'. Is it advisable to solve this problem by using
"BooleanQuery.setMaxClauseCount(Integer.MAX_VALUE)" approach or is a better
alternative (work around) available. Please advice.
Regards,
Ram Prasad
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