markweissman opened a new issue, #13408:
URL: https://github.com/apache/arrow/issues/13408
pyarrow.Table.join handles nulls differently than pandas. Please consider
either changing or documenting this.
(Pdb) df=pa.Table.from_pandas(pd.DataFrame(dict(x=[None, "foo"])));
df.join(df, "x", join_type="inner").to_pandas()
x
0 foo
(Pdb) df=pd.DataFrame(dict(x=[None, "foo"])); df.merge(df, on="x",
how="inner")
x
0 None
1 foo
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