Tian Gao created SPARK-55244:
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Summary: Use np.nan as default for string type in pandas 3
Key: SPARK-55244
URL: https://issues.apache.org/jira/browse/SPARK-55244
Project: Spark
Issue Type: Sub-task
Components: PySpark
Affects Versions: 4.2.0
Reporter: Tian Gao
[https://pandas.pydata.org/docs/user_guide/migration-3-strings.html#the-missing-value-sentinel-is-now-always-nan]
In pandas 3, missing value sentinel is always np.nan. We should follow this
pattern.
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