zhengruifeng opened a new pull request #32805:
URL: https://github.com/apache/spark/pull/32805


   ### What changes were proposed in this pull request?
   In existing impls, it is common case that the vector/matrix need to be 
sliced/copied just due to shape match.
   which makes the logic complex and introduce extra costing of slicing & 
copying.
   
   
   ### Why are the changes needed?
   1, avoid slicing and copying due to shape checking;
   2, simpify the usages;
   
   
   ### Does this PR introduce _any_ user-facing change?
   No
   
   ### How was this patch tested?
   existing testsuites


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