Update issue #52: rewrote GroupingHashTable to use aggregator for key fields output; fixed a bug of incorrect initialization in pre-cluster grouper; tested all integration tests for new aggregation interfaces with larger dataset (so external grouper spills). 

git-svn-id: https://hyracks.googlecode.com/svn/branches/aggregators_dev_next@893 123451ca-8445-de46-9d55-352943316053
3 files changed