guanxinq commented on a change in pull request #17569: Adding sparse support to 
MXTensor for custom operators
URL: https://github.com/apache/incubator-mxnet/pull/17569#discussion_r391260016
 
 

 ##########
 File path: include/mxnet/lib_api.h
 ##########
 @@ -1111,16 +1197,49 @@ extern "C" {
 
     // create a vector of tensors for inputs
     std::vector<MXTensor> inputs(num_in);
+    // create a vector for sparse inputs
+    std::vector<MXInSparse> in_sparse(num_in);
+
     for (int i = 0; i < num_in; i++) {
-      inputs[i].setTensor(indata[i], (MXDType)intypes[i], inshapes[i], 
indims[i],
-                          inIDs[i], {indev_type[i], indev_id[i]});
+      // Dense representation.
+      if(!in_indices_shapes) {
 
 Review comment:
   Fixed.

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