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From Harald Stowasser <stowasse...@idowa.de>
Subject TooManyClauses in BooleanQuery
Date Mon, 13 Jun 2005 11:47:00 GMT
Hello lucene-list readers,

first I want to introduce myself a little. Because I am new at this List:

I am a programmer in a publishing company, 32 years of Age and you can
find my picture at http://www.idowa.de/service/kontakt.
We release some local newspapers and a website (http://www.idowa.de)
with the main focus on regional content.

We use Lucene to create an index over the whole newspaper and website
content. So there is more than 2GB text to indicate.

And now I will tell you my problems in my implementation[1]:

1. Sorting by Date is ruinously slow. So I deactivated it.
2. Because the sorting is so slow, I want to allow the user specifying a
Date-Range. But Lucene throws an BooleanQuery$TooManyClauses[2].
Anywhere I read if you give lucene a higher MaxClauseCount, this will
solve that Problem. But it doesn't work :-(
3. I also read that we should save the Date as YYYYMMDD-String. I don't
like this solution, because I don't know that this will work. And then I
have to reindex the whole Data!

So could you give me a little hint, how i can solve my Date-Prblems?



[1]
Implementation:

  BooleanQuery query= new BooleanQuery();
  query.setMaxClauseCount(262144);
  Query q1= QueryParser.parse(query,"content",analyzer);
  query.add(q1,true,false);
  if(area.length()>2)
  {
    Query q2=new TermQuery( new Term("bereich",area) );
    query.add(q2,true,false);
  }
  try {
    DateFormat df = DateFormat.getDateInstance(
       DateFormat.DATE_FIELD, Locale.GERMAN);
    df.setLenient(true);
    Date d1 = df.parse(date_from);
    Date d2 = df.parse(date_to);
    date_from = DateField.dateToString(d1);
    date_to = DateField.dateToString(d2);
  }   catch (Exception e) { }
  Query q3=new RangeQuery( new Term("datum",date_from),
                           new Term("datum",date_to),true );
  query.add(q3,true,false);
  /*Sort csort= new Sort();
  if (sort.length()>2)
  {
     csort.setSort(sort,reverse);
  }*/
  Hits hits = searcher.search(query);
  //Hits hits = searcher.search(query,csort);
  makeOutput(hits, start, length);
  Date ende= new Date();
  long zeit=(ende.getTime()-anfang.getTime())/100 ;
  ausgabe.append("|" + (float)zeit/10);



  private void makeOutput(Hits hits,int start,int length)
    throws Exception
  {
    int i=start;
    if (hits.length()>0)
    {
      ausgabe.append("<table>");
      for (;(i<hits.length() && (i<start+length));i++)
      {
        Document doc=hits.doc(i);
        ausgabe.append("<tr><td>");
        ausgabe.append(doc.getField("bereich").stringValue()
        ausgabe.append(""</td><td>"");
        DateFormat df = DateFormat.getDateInstance(
          DateFormat.DATE_FIELD, Locale.GERMAN);
        df.setLenient(true);
        ausgabe.append(df.format(
          DateField.stringToDate(doc.getField("datum").stringValue())));
        ausgabe.append("</td><td>");
        ausgabe.append("<a href=\""+doc.getField("link").stringValue());
        ausgabe.append(doc.getField("content_id").stringValue()+ "\">");
        ausgabe.append(doc.getField("content_vorschau").stringValue()
        ausgabe.append("</a>");
        ausgabe.append("</td></tr>");
      }
      ausgabe.append("</table>");
    }
    ausgabe.append("|X|" + hits.length() + "|" + start + "|" + i);
  }

__________________________________________________

[2]
StackTrace:

org.apache.lucene.search.BooleanQuery$TooManyClauses
        at org.apache.lucene.search.BooleanQuery.add(BooleanQuery.java:79)
        at org.apache.lucene.search.BooleanQuery.add(BooleanQuery.java:71)
        at org.apache.lucene.search.RangeQuery.rewrite(RangeQuery.java:99)
        at
org.apache.lucene.search.BooleanQuery.rewrite(BooleanQuery.java:243)
        at
org.apache.lucene.search.IndexSearcher.rewrite(IndexSearcher.java:166)
        at org.apache.lucene.search.Query.weight(Query.java:84)
        at
org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:117)
        at org.apache.lucene.search.Hits.getMoreDocs(Hits.java:64)
        at org.apache.lucene.search.Hits.<init>(Hits.java:51)
        at org.apache.lucene.search.Searcher.search(Searcher.java:41)
        at suchmaschine.LuceneSearcher.erweitert(LuceneSearcher.java:138)
        at suchmaschine.XmlRpcSearcher.erweitert(XmlRpcSearcher.java:49)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:585)
        at org.apache.xmlrpc.Invoker.execute(Invoker.java:168)
        at
org.apache.xmlrpc.XmlRpcWorker.invokeHandler(XmlRpcWorker.java:123)
        at org.apache.xmlrpc.XmlRpcWorker.execute(XmlRpcWorker.java:185)
        at org.apache.xmlrpc.XmlRpcServer.execute(XmlRpcServer.java:151)
        at org.apache.xmlrpc.XmlRpcServer.execute(XmlRpcServer.java:139)
        at org.apache.xmlrpc.WebServer$Connection.run(WebServer.java:773)
        at org.apache.xmlrpc.WebServer$Runner.run(WebServer.java:656)
        at java.lang.Thread.run(Thread.java:595)

__________________________________________________
[3]
My Fields:
  neu.setBoost( boost  );
  neu.add(Field.UnStored("content",content));
  neu.add(Field.Keyword("keyword",keyword));
  ConfDate date = new ConfDate(datum);
  neu.add(Field.Keyword("datum",(Date)date.getUtilDate()));
  neu.add(Field.UnIndexed("content_vorschau",content_vorschau));
  neu.add(Field.UnIndexed("content_id",""+content_id));
  neu.add(Field.UnIndexed("zeitstempel",zeitstempel));
  neu.add(Field.UnIndexed("link",link));
  neu.add(Field.Keyword("bereich",bereich));
  index.addDocument(neu);



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