BUG: join MultiIndex with overlapping IntervalIndex level (#44096) #44588
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phofl
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@johannes-mueller can you merge master and ping on green |
…#44096) `BaseMultiIndexCodesEngine._extract_level_codes` relies on the assumption that `get_indexer()` is always usable as any index level `is_unique`. However, that is not the case for overlapping `IntervalIndex` levels. `get_indexer()` can not be used on an `IntervalIndex` that `is_overlapping` even if it `is_unique`. This patch uses `get_indexer_for()` instead.
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@jreback rebased |
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thanks @johannes-mueller |
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Replacing calls to `get_indexer()` with `get_indexer_for()` as `IntervalIndex`es can be unique and overlapping. Similar to pandas-dev#44588
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Replacing calls to `get_indexer()` with `get_indexer_for()` as `IntervalIndex`es can be unique and overlapping. Similar to pandas-dev#44588
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Replacing calls to `get_indexer()` with `get_indexer_for()` as `IntervalIndex`es can be unique and overlapping. Similar to pandas-dev#44588
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Replacing calls to `get_indexer()` with `get_indexer_for()` as `IntervalIndex`es can be unique and overlapping. Similar to pandas-dev#44588
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Replacing calls to `get_indexer()` with `get_indexer_for()` as `IntervalIndex`es can be unique and overlapping. Similar to pandas-dev#44588
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BaseMultiIndexCodesEngine._extract_level_codesrelies on the assumption thatget_indexer()is always usable as any index levelis_unique. However, thatis not the case for overlapping
IntervalIndexlevels.get_indexer()cannot be used on an
IntervalIndexthatis_overlappingeven if itis_unique.This patch uses
get_indexer_for()instead.This patch checks if the index level is an overlappingIntervalIndexand thencalls
get_indexer_non_unique()instead.We should not switch toget_indexer_non_unique()for other index levels thanoverlapping
IntervalIndex, even though that actually would work as well.That is because
get_indexer_non_unique()comes with a performance penalty ofroughly 30% compared to
get_indexer(), measured by simple%timeitmeasurements.