My first recommendation, of course, would be to re-index the corpus
with a new field. If possible, frankly, that would probably be less
effort than trying to hack in an ID after the fact as well as not as
error-prone.
If you cannot do this for whatever reason, I vaguely remember someone
posting a link to a program they'd put together to do this for a
docValues field, you'd have to search the archives to find it.
bq: Since Lucene is now (more or less?) using a separate index per field
Not quite sure what you mean here, docValues?
Not a lot of help, but at least an idea.
Erick
On Thu, Jun 4, 2015 at 10:20 PM, Trejkaz <trej...@trypticon.org> wrote:
> Hi all.
>
> We had been going for the longest time abusing Lucene's doc IDs as our
> own IDs and of course all our filters still work like this. But at the
> moment, we're looking at ways to break our dependencies on this.
>
> One of the motivators for this is the outright removal of FieldCache
> in Lucene 5. (Yes, I see it's there, being used by UninvertingReader,
> but even UninvertingReader won't let us use the custom parsers we were
> previously relying on to parse values in older fields.)
>
> I know we now have this:
>
> public void updateNumericDocValue(Term term, String field, long value)
> throws IOException
>
> So to add an ID field, I would have to already have an ID field. :(
>
> Since Lucene is now (more or less?) using a separate index per field,
> maybe there is a way to directly add this field?
>
> I don't know if this is down the right path, but it seems like it
> would be something like...
>
> try (Directory directory = FSDirectory.open(Paths.get("/Data/BreakMe")))
> {
> SegmentInfo segmentInfo = ???;
> FieldInfos fieldInfos = ???;
>
> SegmentWriteState writeState = new SegmentWriteState(null, directory,
> segmentInfo,
> fieldInfos,
> null,
> IOContext.DEFAULT);
>
> try (DocValuesConsumer consumer =
> new Lucene50DocValuesFormat().fieldsConsumer(writeState))
> {
> int number = ???;
> long dvGen = ???;
> Map<String, String> attributes = ???;
>
> FieldInfo field = new FieldInfo("docid", number, false, true, false,
> IndexOptions.DOCS,
> DocValuesType.NUMERIC,
> dvGen, attributes);
> Iterable<Number> values = () -> IntStream.range(0, 500)
> .mapToObj(i -> (Number) i)
> .iterator();
> consumer.addNumericField(field, values);
> }
> }
>
> But there are a *lot* of values that I wouldn't have any idea how to get.
>
> TX
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org
> For additional commands, e-mail: java-user-h...@lucene.apache.org
>
---------------------------------------------------------------------
To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org
For additional commands, e-mail: java-user-h...@lucene.apache.org
