You can just create a query with your and'd terms, and then do this:
Weight weight = query.weight(indexSearcher);
IndexReader reader = indexSearcher.getIndexReader();
Scorer scorer = weight.scorer(reader);
int delCount = 0;
while(scorer.next()) {
reader.deleteDocument(scorer.doc());
delCount++;
}
that iterates over all the docIDs without scoring them and without
building up a Hit for each, etc.
Mike
"Antony Bowesman" <[EMAIL PROTECTED]> wrote:
> Hi,
>
> I'm using IndexReader.deleteDocuments(Term) to delete documents in
> batches. I
> need the deleted count, so I cannot use IndexWriter.deleteDocuments().
>
> What I want to do is delete documents based on more than one term, but
> not like
> IndexWriter.deleteDocuments(Term[]) which deletes all documents with ANY
> term.
> I want it to delete documents which have ALL terms, e.g.
>
> Term("owner", "ownerUID") AND Term("subject", "something");
>
> I have a new reader being used, so I could make a new IndexSearcher and
> query
> the documents with all terms in a BooleanQuery and then iterate the
> results, but
> that would either mean using the Hits mechanism or TopDocs and seems like
> a
> heavyweight way to do things.
>
> What I want to be able to do is to delete sequentially without storing up
> a
> result set as I may want to delete all and ALL may be rather big.
>
> I see the implementation uses reader.termDocs() to do the deletion for a
> single
> Term, which of course is easy, but is there a simple way to make a
> deletion for
> multiple terms with AND via the reader using, say termDocs, that will not
> potentially use large amounts of memory, or should I just go with the
> searcher
> TopDocs mechanism and do that also in batches to avoid the risk of a
> large
> memory hit.
>
> I know there's lots of clever 'expert-mode' stuff under the Lucene API
> hood, but
> does anyone know any good way to do this or have I missed anything
> obvious in
> the API docs?
>
> Thanks
> Antony
>
>
>
>
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