BUG-24212 fix when other_index has incompatible dtype by JustinZhengBC · Pull Request #25009 · pandas-dev/pandas (original) (raw)

• closes REGR: re-evaluate merge fix of PR #24916 #25001
• tests added / passed
• passes git diff upstream/master -u -- "*.py" | flake8 --diff
• whatsnew entry

Followup to #24916, addresses the case when the other index has an incompatible dtype, so we cannot take directly from it. Currently, this PR naively replaces the missing index values with the number of the rows in the other index that caused them replaces the missing index values with the appropriate NA value.

Still working on adding cases when it is possible to combine indices of sparse/categorical dtypes without densifying.