DIHCacheSupport ignores left side of where="xid=x.id" attribute
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                 Key: SOLR-2933
                 URL: https://issues.apache.org/jira/browse/SOLR-2933
             Project: Solr
          Issue Type: Bug
          Components: contrib - DataImportHandler
    Affects Versions: 4.0
            Reporter: Mikhail Khludnev
            Priority: Minor


DIHCacheSupport introduced at SOLR-2382 uses new config attributes cachePk and 
cacheLookup. But support old one where="xid=x.id" is broken by 
[DIHCacheSupport.<init>|http://svn.apache.org/viewvc/lucene/dev/trunk/solr/contrib/dataimporthandler/src/java/org/apache/solr/handler/dataimport/DIHCacheSupport.java?view=markup]
 - it never put where="" sides into the context, but it revealed by 
[SortedMapBackedCache.<init>|http://svn.apache.org/viewvc/lucene/dev/trunk/solr/contrib/dataimporthandler/src/java/org/apache/solr/handler/dataimport/SortedMapBackedCache.java?view=markup],
 which takes just first column as a primary key. That's why all tests are green.

To reproduce the issue I need just reorder entry at [line 
219|http://svn.apache.org/viewvc/lucene/dev/trunk/solr/contrib/dataimporthandler/src/test/org/apache/solr/handler/dataimport/TestCachedSqlEntityProcessor.java?revision=1201659&view=markup]
 and make desc first and picked up as a primary key. 

To do that I propose to chose concrete map class randomly for all DIH test 
cases at 
[createMap()|http://svn.apache.org/viewvc/lucene/dev/trunk/solr/contrib/dataimporthandler/src/test/org/apache/solr/handler/dataimport/AbstractDataImportHandlerTestCase.java?revision=1149600&view=markup].
 

I'm attaching test breaking patch and seed.



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