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https://issues.apache.org/jira/browse/ARROW-4221?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wes McKinney resolved ARROW-4221.
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Resolution: Fixed
Issue resolved by pull request 7477
[https://github.com/apache/arrow/pull/7477]
> [Format] Add canonical flag in COO sparse index
> -----------------------------------------------
>
> Key: ARROW-4221
> URL: https://issues.apache.org/jira/browse/ARROW-4221
> Project: Apache Arrow
> Issue Type: Improvement
> Components: Format
> Reporter: Kenta Murata
> Assignee: Kenta Murata
> Priority: Minor
> Labels: pull-request-available, sparse
> Fix For: 1.0.0
>
> Time Spent: 5h 20m
> Remaining Estimate: 0h
>
> To support the integration with scipy.sparse.coo_matrix, it is necessary to
> add a flag in SparseCOOIndex. This flag denotes whether elements in COO
> sparse tensor is sorted lexicographically or not.
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