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From "Peter Karich (JIRA)" <>
Subject [jira] Commented: (SOLR-792) Pivot (ie: Decision Tree) Faceting Component
Date Mon, 08 Nov 2010 15:16:10 GMT


Peter Karich commented on SOLR-792:

Hi Toke and all,

maybe I am a bit evil or stupid but could someone enlight me why this patch is necessary?

Why can't you we the existing mechanisms in Solr (facets!) and a bit logic while indexing:

This has no performance problems when using tons of categories. We already using it with lots
of categories. It works out of the box with a nearly infinity depth (either you need a DB
unlimited or the URL length is the limit).

The only drawback of this approach is that you won't be able to display two or more 'branches'
at the same time. Only one current branch with the current possible categories is possible,
which is no limitation in our case. Because the UI would be unusable if too many items would
be visible at the same time.

One could introduce a special update component for this feature which uses a category tree
(in RAM) built from the json or xml definition. I could create such a component if someone
is interested.


> Pivot (ie: Decision Tree) Faceting Component
> --------------------------------------------
>                 Key: SOLR-792
>                 URL:
>             Project: Solr
>          Issue Type: New Feature
>            Reporter: Erik Hatcher
>            Assignee: Yonik Seeley
>            Priority: Minor
>         Attachments: SOLR-792-as-helper-class.patch, SOLR-792-PivotFaceting.patch, SOLR-792-PivotFaceting.patch,
SOLR-792-PivotFaceting.patch, SOLR-792-PivotFaceting.patch, SOLR-792-raw-type.patch, SOLR-792.patch,
SOLR-792.patch, SOLR-792.patch, SOLR-792.patch, SOLR-792.patch, SOLR-792.patch, SOLR-792.patch
> A component to do multi-level faceting.

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