Can you use a BooleanFilter (or ChainedFilter in 4.x) alongside your
BooleanQuery? Seems more logical and I suspect would solve the problem.
Caching filters can be good too, depending on how often your data changes.
See CachingWrapperFilter.
--
Ian.
On Tue, Mar 10, 2015 at 12:45 PM, Chris Bamford <cbamf...@mimecast.com>
wrote:
>
> Hi,
>
> I have an index of 30 docs, 20 of which have an owner field of "UserA"
> and 10 of "UserB".
> I also have a query which consists of:
>
> BooleanQuery:
> -- Clause 1: TermQuery
> -- Clause 2: FilteredQuery
> ----- Branch 1: MatchAllDocsQuery()
> ----- Branch 2: MyNDVFilter
>
> I execute my search as follows:
>
> searcher.search( booleanQuery,
> new TermFilter(new Term("owner",
> "UserA"),
> 50);
>
> The TermFilter's job is to reduce the number of searchable documents
> from 30 to 20, which it does for all clauses of the BooleanQuery except for
> MyNDVFilter which iterates through the full 30 docs, 10 needlessly. How
> can I restrict it so it behaves the same as the other query branches?
>
> MyNDVFilter source code:
>
> public class MyNDVFilter extends Filter {
>
> private String fieldName;
> private String matchTag;
>
> public TagFilter(String ndvFieldName, String matchTag) {
> this.fieldName = ndvFieldName;
> this.matchTag = matchTag;
> }
>
> @Override
> public DocIdSet getDocIdSet(AtomicReaderContext context, Bits
> acceptDocs) throws IOException {
>
> AtomicReader reader = context.reader();
> int maxDoc = reader.maxDoc();
> final FixedBitSet bitSet = new FixedBitSet(maxDoc);
> BinaryDocValues ndv = reader.getBinaryDocValues(fieldName);
>
> if (ndv != null) {
> for (int i = 0; i < maxDoc; i++) {
> BytesRef br = ndv.get(i);
> if (br.length > 0) {
> String strval = br.utf8ToString();
> if (strval.equals(matchTag)) {
> bitSet.set(i);
> System.out.println("MyNDVFilter >> " + matchTag +
> " matched " + i + " [" + strval + "]");
> }
> }
> }
> }
>
> return new DVDocSetId(bitSet); // just wraps a FixedBitSet
> }
> }
>
>
>
> Chris Bamford m: +44 7860 405292 w: www.mimecast.com Senior Developer p:
> +44 207 847 8700 Address click here
> <http://www.mimecast.com/About-us/Contact-us/>
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