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https://issues.apache.org/jira/browse/SOLR-3407?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13261037#comment-13261037
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Yonik Seeley commented on SOLR-3407:
------------------------------------
See the comment in the schema.xml:
{code}
<!-- field names should consist of alphanumeric or underscore characters
only and
not start with a digit. This is not currently strictly enforced,
but other field names will not have first class support from all
components
and back compatibility is not guaranteed.
-->
{code}
> Field names with leading digits cause strange behavior when used with "fl"
> param
> --------------------------------------------------------------------------------
>
> Key: SOLR-3407
> URL: https://issues.apache.org/jira/browse/SOLR-3407
> Project: Solr
> Issue Type: Bug
> Components: search
> Affects Versions: 4.0
> Environment: apache-solr-4.0-2012-04-24_08-27-47
> Reporter: Chris Bleakley
>
> When specifying a field name that starts with a digit (or digits) in the "fl"
> parameter solr returns both the field name and field value as the those
> digits. For example, using nightly build
> "apache-solr-4.0-2012-04-24_08-27-47" I run:
> java -jar start.jar
> and
> java -jar post.jar solr.xml monitor.xml
> If I then add a field to the field list that starts with a digit (
> localhost:8983/solr/select?q=*:*&fl=24 ) the results look like:
> ...
> <doc>
> <long name="24">24</long>
> </doc>
> ...
> if I try fl=24_7 it looks like everything after the underscore is truncated
> ...
> <doc>
> <long name="24">24</long>
> </doc>
> ...
> and if I try fl=3test it looks like everything after the last digit is
> truncated
> ...
> <doc>
> <long name="3">3</long>
> </doc>
> ...
> If I have an actual value for that field (say I've indexed 24_7 to be "true"
> ) I get back that value as well as the behavior above.
> ...
> <doc>
> <bool name="24_7">true</bool>
> <long name="24">24</long>
> </doc>
> ...
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