BTree search op now takes input tuples as search keys. Added ConstantTupleSourceProviderOp to feed constant search keys. Modified BTree app example to search secondary index and then retrieve corresponding records from primary index.

git-svn-id: https://hyracks.googlecode.com/svn/trunk/hyracks@171 123451ca-8445-de46-9d55-352943316053
17 files changed