Matthias Boehm created SYSTEMML-2369:
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Summary: Incorrect nnz runtime propagation on codegen spark cell
ops w/o agg
Key: SYSTEMML-2369
URL: https://issues.apache.org/jira/browse/SYSTEMML-2369
Project: SystemML
Issue Type: Bug
Reporter: Matthias Boehm
The recent codegen compiler modification in SYSTEMML-2134 revealed a hidden
issue where spark codegen cell operations without aggregation wrongly
propagated the number of non-zeros of the main input into the output. This can
lead to incorrect results if the main input is empty but the cell operation is
sparse-unsafe.
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