Commits
Kenta Murata authored and François Saint-Jacques committed c63b26debd6
ARROW-6501: [C++] Remove non_zero_length_ field from SparseIndex class This field is essentially needless, and may be obstacle to the future improvement of sparse tensors, such as adding value inserting feature. Closes #7079 from mrkn/ARROW-6501 Authored-by: Kenta Murata <mrkn@mrkn.jp> Signed-off-by: François Saint-Jacques <fsaintjacques@gmail.com>