renato2099 opened a new pull request, #1320:
URL: https://github.com/apache/datafusion-python/pull/1320
# Which issue does this PR close?
Closes #1305
# Rationale for this change
Datafusion-python should follow datafusion implementation and disallow
dropping keys when doing a full outer join as both keys are not equivalent thus
they can't just be dropped. Users can then decide on how to proceed based on
their use case.
# What changes are included in this PR?
fix + unit test
# Are there any user-facing changes?
yes, disallowing dropping keys when doing a full outer join as that is not
semantically correct.
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