HyukjinKwon opened a new pull request, #39344:
URL: https://github.com/apache/spark/pull/39344
### What changes were proposed in this pull request?
This PR proposes to support to infer field names when the input data is the
list of dictionaries in `SparkSession.createDataFrame`.
For example,
```
spark.createDataFrame([{"course": "dotNET", "earnings": 10000, "year":
2012}]).show()
```
**Before**:
```python
+------+-----+----+
| _1| _2| _3|
+------+-----+----+
|dotNET|10000|2012|
+------+-----+----+
```
**After**:
```python
+------+--------+----+
|course|earnings|year|
+------+--------+----+
|dotNET| 10000|2012|
+------+--------+----+
```
### Why are the changes needed?
To match the behaviour with the regular PySpark.
### Does this PR introduce _any_ user-facing change?
No to end users because Spark Connect has not been released.
### How was this patch tested?
Unittest was added.
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