[SOLR-10118] Wrong comments in example schema about DocValues requirements

• Type: Bug
• Status: Resolved
• Priority: Trivial
• Resolution: Fixed
• Affects Version/s: 6.4.1
• Component/s: examples
• Assignee: Unassigned
• Reporter: Andreas Hubold
• Created: 10/Feb/17 09:15
• Updated: 20/Jul/19 13:24
• Resolved: 20/Jul/19 13:24

Description

Comments in the example schema files of Solr about field
requirements for DocValues seem to be wrong. For example, in
server/solr/configsets/basic_configs/conf/managed-schema:

     docValues: [...] they might
        require the field to be single-valued, be required or have a default
        value (check the documentation of the field type you're
interested in
        for more information)

     <!-- The StrField [...]
        It supports doc values but in that case the field needs to be
        single-valued and either required or have a default value.
       -->

   <!--
     Default numeric field types. [...]

     These fields support doc values, but they require the field to be
     single-valued and either be required or have a default value.
   -->

I haven't found these limitations in the reference guide. It states that
multi-valued DocValues are stored as SORTED_SET.

The comments are probably outdated?

It seems the restrictions have been removed, e.g. with SOLR-4490 and https://github.com/apache/lucene-solr/commit/d208878c116bb66d6cb114ce51f69b7264ab668a#diff-ecbdc5fb2ccf861a92837e21fb37ace8