Explicit extraction of key class Tag since traits don't support context bound access; but actual implementation knows it
Explicit extraction of key class Tag since traits don't support context bound access; but actual implementation knows it
R-like syntax for number of columns
R-like syntax for number of columns
R-like syntax for number of rows.
R-like syntax for number of rows.
Action operator -- does not necessary means Spark action; but does mean running BLAS optimizer and writing down Spark graph lineage since last checkpointed DRM.
Action operator -- does not necessary means Spark action; but does mean running BLAS optimizer and writing down Spark graph lineage since last checkpointed DRM.
Any logical binary operator (such as A + B). <P/>
Any logical operator derived from this is also capabile of triggering optimizer checkpoint, hence, it also inherits CheckpointAction. <P/>
LHS key type
RHS key type
result key type