zhengruifeng opened a new pull request, #48613:
URL: https://github.com/apache/spark/pull/48613
### What changes were proposed in this pull request?
Fix the type hint for `extract`, `date_part` and `datepart`
### Why are the changes needed?
argument `field` never supports column name:
```python
In [6]: df = spark.createDataFrame([(datetime.datetime(2015, 4, 8, 13, 8,
15), "YEAR",)], ['ts', 'field'])
In [7]: df.select(sf.extract("field", "ts"))
...
AnalysisException: [NON_FOLDABLE_ARGUMENT] The function `extract` requires
the parameter `field` to be a foldable expression of the type "STRING", but the
actual argument is a non-foldable. SQLSTATE: 42K08
```
### Does this PR introduce _any_ user-facing change?
yes, doc only change
### How was this patch tested?
ci
### Was this patch authored or co-authored using generative AI tooling?
no
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