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https://issues.apache.org/jira/browse/SOLR-264?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12506267
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Hoss Man commented on SOLR-264:
-------------------------------

Uhh, guys ... this code violates the contract of Comparator (which is 
admittedly not an explicit part of the of ScoreDocComparator contract, but it 
is implied) because:

  1) the method isn't stable ... compare(x,y) is not garunteed to have the same 
sign as a subsequent compare(x,y)  
  2) it doesn't guarantee that the sign of compare(x,y) is the negation of the 
sign of compare(y,x) 
  3) it doesn't guarantee a transitive property ... if ((compare(x, y)>0) && 
(compare(y, z)>0))  then: compare(x, z)>0.



> Support 'random' sort order
> ---------------------------
>
>                 Key: SOLR-264
>                 URL: https://issues.apache.org/jira/browse/SOLR-264
>             Project: Solr
>          Issue Type: New Feature
>            Reporter: Ryan McKinley
>            Priority: Minor
>         Attachments: SOLR-264-RandomSortOrder.patch, 
> SOLR-264-RandomSortOrder.patch, SOLR-264-RandomSortOrder.patch
>
>
> Support querying for random documents:
>   http://localhost:8983/solr/select/?q=*:*&fl=sku&sort=random%20desc

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