DataImportHandler Streaming XML Parse

All - We're using DIH to import flat xml files. We're getting Heap memory exceptions due to the file size. Is there any way to force DIH to do a streaming parse rather than a DOM parse? I really don't want to chunk my files up or increase the heap size. Many Thanks! Josh

fl Parameter and Wildcards for Dynamic Fields

I'm using SOLR 3.3 and would like to know how to return a list of dynamic fields in my search results using a wildcard with the fl parameter. I found SOLR-2444 but this appears to be for SOLR 4.0. Am I correct in assuming this isn't doable yet? Plea