Merge projection selects too many columns#283
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rjzamora
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Aug 30, 2023
dask_expr/_merge.py
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| if isinstance(self.left_on, list): | ||
| left_on = self.left_on | ||
| else: | ||
| left_on = [self.left_on] if self.left_on is not None else [] | ||
| if isinstance(self.right_on, list): | ||
| right_on = self.right_on | ||
| else: | ||
| right_on = [self.right_on] if self.right_on is not None else [] |
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Suggested change
| if isinstance(self.left_on, list): | |
| left_on = self.left_on | |
| else: | |
| left_on = [self.left_on] if self.left_on is not None else [] | |
| if isinstance(self.right_on, list): | |
| right_on = self.right_on | |
| else: | |
| right_on = [self.right_on] if self.right_on is not None else [] | |
| left_on = _convert_to_list(self.left_on) | |
| right_on = _convert_to_list(self.right_on) |
This seems more readable to me, but you will need to add the following import _convert_to_list from dask_expr._util at the top.
rjzamora
reviewed
Aug 30, 2023
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| if left_on is None: | ||
| left_on = [] |
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Curious why you need this? Tests seem to pass fine without it.
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If this is necessary, then we probably want to clean up the dead logic below that assumes left_on and right_on could be None.
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Yeah sorry that got a bit too entangled, that's needed for #284 (which also cleans up the dead logic)
rjzamora
approved these changes
Aug 30, 2023
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