ueshin opened a new pull request, #40692:
URL: https://github.com/apache/spark/pull/40692
### What changes were proposed in this pull request?
Supports duplicated nested field names when `spark.createDataFrame` or
`df.collect`.
### Why are the changes needed?
If there are duplicated nested field names, the following error is raised:
```py
>>> from pyspark.sql.types import *
>>>
>>> data = [Row(Row("a", 1), Row(2, 3, "b", 4, "c")), Row(Row("x", 6),
Row(7, 8, "y", 9, "z"))]
>>> schema = (
... StructType()
... .add("struct", StructType().add("x", StringType()).add("x",
IntegerType()))
... .add(
... "struct",
... StructType()
... .add("a", IntegerType())
... .add("x", IntegerType())
... .add("x", StringType())
... .add("y", IntegerType())
... .add("y", StringType()),
... )
... )
>>> df = spark.createDataFrame(data, schema=schema)
Traceback (most recent call last):
...
pyarrow.lib.ArrowTypeError: Expected bytes, got a 'int' object
```
### Does this PR introduce _any_ user-facing change?
The duplicated nested field names will be available.
### How was this patch tested?
Added a test.
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