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From "Shai Erera (JIRA)" <>
Subject [jira] [Commented] (LUCENE-4765) Multi-valued docvalues field
Date Sun, 10 Feb 2013 07:59:12 GMT


Shai Erera commented on LUCENE-4765:

I briefly looked at the patch, looks good. Perhaps instead of returning an iterator, we should
return an IntsRef? While optimizing facets code, Mike and I observed the "iterator-based API"
is not so good for "hot code", and e.g. if we'll want to use this for faceting, a bulk-API
would be better I think.

Same question for indexing -- in facets, we get all the ordinals at once, so is it possible
to have a field which takes a list of ordinals instead of adding many instances of SortedSetDVField?
> Multi-valued docvalues field
> ----------------------------
>                 Key: LUCENE-4765
>                 URL:
>             Project: Lucene - Core
>          Issue Type: New Feature
>            Reporter: Robert Muir
>         Attachments: LUCENE-4765.patch
> The general idea is basically the docvalues parallel to FieldCache.getDocTermOrds/UninvertedField
> Currently this stuff is used in e.g. grouping and join for multivalued fields, and in
solr for faceting.

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