houqp commented on pull request #792:
URL: https://github.com/apache/arrow-datafusion/pull/792#issuecomment-919734414
It's also interesting that the adding an explicit column `a` project does
fix the test error:
```python
df = df.select(
f.col("a") + f.col("b"),
f.col("a") - f.col("b"),
f.col("a"),
).filter(f.col("a") > f.lit(2))
```
I am not able to reproduce this error with the Rust dataframe API though.
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