zhengruifeng commented on code in PR #36640:
URL: https://github.com/apache/spark/pull/36640#discussion_r887596704
##########
python/pyspark/sql/session.py:
##########
@@ -611,8 +612,8 @@ def _inferSchema(
:class:`pyspark.sql.types.StructType`
"""
first = rdd.first()
- if not first:
- raise ValueError("The first row in RDD is empty, " "can not infer
schema")
+ if isinstance(first, Sized) and len(first) == 0:
Review Comment:
what about filtering out the `None` rows:
```
first = rdd.filter( no None cond ).first()
```
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