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This commit contains the final set of changes for improving the performance of partition pruning. For each HdfsTable, we materialize a set of partition value metadata that allows the efficient evaluation of simple predicates on partition attributes without invoking the BE. These changes result in three orders of magnitude performance improvement during partition pruning. Change-Id: I5b405f0f45a470f2ba7b2191e0d46632c354d5ae Reviewed-on: http://gerrit.ent.cloudera.com:8080/2700 Reviewed-by: Dimitris Tsirogiannis <dtsirogiannis@cloudera.com> Tested-by: jenkins Reviewed-on: http://gerrit.ent.cloudera.com:8080/2823