HiveIndexQueryContext queryContext = queryContexts.get(chosenIndex);
// prepare the map reduce job to use indexing
MapWork work = currentTask.getWork().getMapWork();
work.setInputformat(queryContext.getIndexInputFormat());
work.addIndexIntermediateFile(queryContext.getIndexIntermediateFile());
// modify inputs based on index query
Set<ReadEntity> inputs = pctx.getSemanticInputs();
inputs.addAll(queryContext.getAdditionalSemanticInputs());
List<Task<?>> chosenRewrite = queryContext.getQueryTasks();