Title:    Current Limitations and Future Work
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This section contains an almost certainly incomplete list of known limitations and plans for future work.

* We would like to have easy support for reading and writing data from/to the Hive metastore via the HCatalog
APIs.
* The optimizer does not yet merge different groupByKey operations that run over the same input data into a single
MapReduce job. Implementing this optimization will provide a major performance benefit for a number of problems.