reminisce commented on issue #7935: Zeroes CSR still needs a valid row_pointer array. URL: https://github.com/apache/incubator-mxnet/pull/7935#issuecomment-330371832 I think it's okay for operators to work on a zero csr with empty `indptr` as long as the csr is checked if zero before performing any regular operations like the one exposed in https://github.com/apache/incubator-mxnet/issues/7920. In addition to what @eric-haibin-lin said about the intention of delaying memory allocation, I think it's also the intended way to avoid unnecessary memory allocation for zero csr tensors. We can provide a util function checking whether a sparse tensor (csr or rsp) is zero for being used in operator implementation. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org
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