I have a set of documents that all have a "timestamp" field which is stored as
a long integer number. The field is indexed in my Lucene index as a number
using NumericField with a precision step of 8:
Field field = new NumericField("timestamp", 8);
field.setLongValue( timestampValue);
I do this so I can do numeric range queries to retrieve all documents that fall
within a specific time range.
The query I construct has two parts to it, a query, and a filter. I get the
document hits as follows:
IndexReader reader = ...... some index reader.....
IndexSearcher searcher = new IndexSearcher(reader);
Filter filter = NumericRangeFilter.newLongRange("timestamp", 8, startTime,
endTime, false, true);
Query query = new MatchAllDocsQuery();
searcher.search( query, filter, myCollector); // My collector is a super
class of Collector - saves all Hits
Occasionally, I have a single document with a very specific timestamp I want to
retrieve. Suppose that timestamp is timeX, I will create the filter as follows:
Filter filter = NumericRangeFilter.newLongRange("timestamp", 8, timeX-1,
timeX, false, true);
But with this filter, the document that should be found is never found. I have
even tried expanding the time range as follows, but with no success:
Filter filter = NumericRangeFilter.newLongRange("timestamp", 8, timeX-1,
timeX+500, false, true);
Strangely, a filter that should NOT have found the document actually did find
the document:
Filter filter = NumericRangeFilter.newLongRange("timestamp", 8, timeX,
timeX+1000, false, true);
This filter should NOT have found the document since the minInclusive argument
is false.
I have also noticed that sometimes when I have several documents with exactly
the same timestamp, a query will return some, but not all, of the documents.
I have also tried to use a NumericRangeQuery as follows:
Query query = NumericRangeQuery.newLongRange("timestamp", 8, timeX-1, timeX,
false, true);
searcher.search( query, null, myCollector);
This also fails to return my document(s).
Am I doing something wrong here? Have I misunderstood how this is supposed to
work? Has anyone else had problems like this?
Thanks for any help or guidance or tips you can give me,
-Daniel Sanders
