tree dede6c02c31a82edbea390e8019ba21cb276735e
parent 60b3a60ea517f0982399b842822d765ac051393a
author baunsgaard <baunsgaard@tugraz.at> 1627745420 +0200
committer baunsgaard <baunsgaard@tugraz.at> 1628081492 +0200

[MINOR] CUMSUM on empty matrix

In aggregateUnaryMatrixEmpty cumulative sum on an empty matrix is a no-op.
I added the switch case to this since i ran into an edge case where
spark would say unsupported aggregation type.
Also added is a test that verify this bug.