Thanks very much Mike! That's very helpful! I got MultiDocValues.getNumericValues to work.
A follow up question: what's the best way/how do I retrieve binaryDocValues? Regards, Joe On Fri, Jun 23, 2017 at 11:00 AM, Michael McCandless < luc...@mikemccandless.com> wrote: > Try subscribing to the mailing list again? Just send an email to > java-user-subscr...@lucene.apache.org, then follow the instructions of > the email it replies with. > > You shouldn't have to open a new DirectoryReader; instead, use the one you > just searched (where you got your ScoreDocs from); use > IndexSearcer.getIndexReader to get its reader. > > The docId from your ScoreDoc is called the "global" docId, which are > assigned by concatenating the docIds from each segment (you have 4 > segments). If you are just looking up numeric doc values fields, I suggest > you use MultiDocValues.getNumericValues; this will return a doc values > instance that understand global docIds and you can just look up the value > directly. > > Note that in Lucene 7.0 the DV APIs have switched to iterators. > > Mike McCandless > > http://blog.mikemccandless.com > > On Thu, Jun 22, 2017 at 6:20 PM, Joe Ye <yuanzhou...@gmail.com> wrote: > >> Thanks a lot Mike! I still don't get any emails from the mailing list :( >> >> Note that I am new to docValues and tried to google examples to retrieve >> docValues from search results but I didn't find much info. I experimented >> with the below code using Lucene 6.2.1: >> >> >> >> for (ScoreDoc scoreDoc : scoreDocs) { >> >> Document document = searcher.doc(scoreDoc.doc); >> >> resultDocs.add(document); >> >> >> >> // TODO: get docValues for the doc >> >> DirectoryReader reader = DirectoryReader.open(indexWrit >> er.getDirectory()); >> >> List<LeafReaderContext> readerContexts = >> reader.getContext().leaves(); >> >> for (LeafReaderContext readerContext : readerContexts) { >> >> LeafReader leafReader = readerContext.reader(); >> >> NumericDocValues docValues = >> leafReader.getNumericDocValues(someDocValueField); >> >> if (docValues != null) { >> >> long docValue = docValues.get(scoreDoc.doc); >> >> } >> >> } >> >> } >> >> >> >> I have a numeric docValue field. From debugger I can see there are 4 >> leaves and hence 4 leafReaders and only the 4th reader seems to get the >> correct value for the target docId (and I'm not sure why 4 values here)? >> What did I miss/do wrong? Could you point me to the right direction (with >> examples) please? >> >> >> Many thanks, >> >> Joe >> >> On Tue, Jun 20, 2017 at 12:14 AM, Michael McCandless < >> luc...@mikemccandless.com> wrote: >> >>> In pure Lucene you could just pull the doc values for the docIDs in your >>> set of search results; MultiDocValues can be helpful sugar here, unless you >>> need SORTED or SORTED_SET in which case it's best to go per-segment. >>> >>> Or just track down where Solr does this and poach those sources. >>> >>> Mike McCandless >>> >>> http://blog.mikemccandless.com >>> >>> On Mon, Jun 19, 2017 at 11:50 AM, Joe Ye <yuanzhou...@gmail.com> wrote: >>> >>>> Thanks Mike! My colleague only forwarded Erick's Solr reply today as it >>>> seems I didn't get any emails and may have been taken off the mailing list >>>> for some reason? >>>> >>>> We're using Lucene core only (version 6.2.1 at the moment). So there's >>>> no link between the docValue and its associated stored field? Is there >>>> anything similar/equivalent to useDocValuesAsStored in Lucene core? >>>> We're trying to use docValues to avoid a full update (delete + create >>>> new)... Yet, we still need to retrieve the updated values. >>>> >>>> Regards, >>>> Joe >>>> >>>> On Mon, Jun 19, 2017 at 4:16 PM, Michael McCandless < >>>> luc...@mikemccandless.com> wrote: >>>> >>>>> Updating the doc value will not update the stored field (what >>>>> document.get returns). If you need to change stored fields you have to >>>>> use >>>>> the IW.updateDocuments API, where the old document is deleted and a new >>>>> document is indexed, atomically (to refresh). >>>>> >>>>> But also see Erick's solr-specific response (to the list) a week ago. >>>>> >>>>> Mike McCandless >>>>> >>>>> http://blog.mikemccandless.com >>>>> >>>>> On Mon, Jun 19, 2017 at 5:41 AM, Joe Ye <yuanzhou...@gmail.com> wrote: >>>>> >>>>>> Hi, >>>>>> >>>>>> Could anyone help with my issue described below? If I'm not posting >>>>>> on the >>>>>> right mailing list please direct me to the correct one. >>>>>> >>>>>> Many thanks, >>>>>> Joe >>>>>> >>>>>> >>>>>> On Mon, Jun 12, 2017 at 3:05 PM, Joe Ye <yuanzhou...@gmail.com> >>>>>> wrote: >>>>>> >>>>>> > Hi, >>>>>> > >>>>>> > I have a few NumericDocValuesField fields and also added separate >>>>>> > StoredField fields to store the values so that I can access them in >>>>>> query >>>>>> > results. I used IndexWriter.updateNumericDocValue to update the >>>>>> value of >>>>>> > a DocValues field. Then I firstly called >>>>>> SearcherManager.maybeRefresh to >>>>>> > ensure SearcherManager.acquire will return refreshed instances and >>>>>> used DocValuesNumbersQuery >>>>>> > with the updated value. I did get the matching document in the query >>>>>> > result but when I tried to access its value using Document.get, >>>>>> it's still >>>>>> > the old value. It appears that updating the DocValues field doesn't >>>>>> update >>>>>> > its associated StoredField value. What do I miss here? >>>>>> > >>>>>> > >>>>>> > I would highly appreciate your help! >>>>>> > >>>>>> > >>>>>> > Regards, >>>>>> > >>>>>> > Joe >>>>>> > >>>>>> >>>>> >>>>> >>>> >>> >> >
