Thanks Mike, just what I was after.
Antony
Michael McCandless wrote:
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
---------------------------------------------------------------------
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
---------------------------------------------------------------------
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
---------------------------------------------------------------------
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
