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From 顿顿 <libo...@gmail.com>
Subject Re: How groupingSearch specifies SortedNumericDocValuesField
Date Wed, 15 May 2019 06:06:37 GMT
Hi:

This is a unit test, and I changed to NumericDocValuesField with a similar
error.

I tried testing the NumericDocValuesField, SortedNumericDocValuesField and
SortedSetDocValuesField, these three fields can not be specified in
groupingSearch. Does groupingSearch only support SortedDocValuesField?



Martin Grigorov <mgrigorov@apache.org> 于2019年5月15日周三 下午1:51写道:

> Hi,
>
> On Tue, May 14, 2019 at 8:28 PM 顿顿 <liboemc@gmail.com> wrote:
>
> > When I use groupingSearch specified as SortedNumericDocValuesField,
> > I got an "unexpected docvalues type NUMERIC for field 'id'
> > (expected=SORTED)" Exception.
> >
> > My code is as follows:
> >  String indexPath = "tmp/grouping";
> >         Analyzer standardAnalyzer = new StandardAnalyzer();
> >         Directory indexDir = FSDirectory.open(Paths.get(indexPath));
> >         IndexWriterConfig indexWriterConfig = new
> > IndexWriterConfig(standardAnalyzer);
> >         indexWriterConfig.setOpenMode(IndexWriterConfig.OpenMode.CREATE);
> >         IndexWriter masterIndex = new IndexWriter(indexDir,
> > indexWriterConfig);
> >
> >         String name = "Tom";
> >         for (int i = 1; i < 5; i++) {
> >             Document doc = new Document();
> >             doc.add(new StringField("name", name + "_" + i,
> > Field.Store.YES));
> >             doc.add(new SortedNumericDocValuesField("id", i));
> >             doc.add(new StoredField("id", i));
> >
>
> are you sure both fields should have the same name ("id") ?
>
>
> >             masterIndex.addDocument(doc);
> >
> >         }
> >         masterIndex.commit();
> >         masterIndex.commit();
> >
> >         IndexReader reader =
> > DirectoryReader.open(FSDirectory.open(Paths.get(indexPath)));
> >         IndexSearcher searcher = new IndexSearcher(reader);
> >
> >         GroupingSearch groupingSearch = new GroupingSearch("id");
> >         TopGroups topGroups = groupingSearch.search(searcher, new
> > MatchAllDocsQuery(), 0, 100);
> >
> >         System.out.println(topGroups.totalHitCount);
> >         reader.close();
> >
> >
> > The exception is as follows:
> > Exception in thread "main" java.lang.IllegalStateException: unexpected
> > docvalues type SORTED_NUMERIC for field 'id' (expected=SORTED). Re-index
> > with correct docvalues type.
> > at org.apache.lucene.index.DocValues.checkField(DocValues.java:317)
> > at org.apache.lucene.index.DocValues.getSorted(DocValues.java:369)
> > at
> >
> >
> org.apache.lucene.search.grouping.TermGroupSelector.setNextReader(TermGroupSelector.java:56)
> > at
> >
> >
> org.apache.lucene.search.grouping.FirstPassGroupingCollector.doSetNextReader(FirstPassGroupingCollector.java:348)
> > at
> >
> >
> org.apache.lucene.search.SimpleCollector.getLeafCollector(SimpleCollector.java:33)
> > at org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:643)
> > at org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:443)
> > at
> >
> >
> org.apache.lucene.search.grouping.GroupingSearch.groupByFieldOrFunction(GroupingSearch.java:141)
> > at
> >
> >
> org.apache.lucene.search.grouping.GroupingSearch.search(GroupingSearch.java:113)
> >
> >
> > The version of Lucene I am using is 8.0.0.
> >
> >
> > Finally, I want to know how groupingSearch specifies three fields:
> > NumericDocValuesField, SortedNumericDocValuesField,
> > SortedSetDocValuesField?
> >
> >
> >
> >
> > Thank you for your attention  to this  matter!
> >
>

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