dongjoon-hyun opened a new pull request #29707:
URL: https://github.com/apache/spark/pull/29707
### What changes were proposed in this pull request?
This PR aims to fix indeterministic behavior on DataStreamReader/Writer
options like the following.
```scala
scala> spark.readStream.format("parquet").option("paTh", "1").option("PATH",
"2").option("Path", "3").option("patH", "4").option("path", "5").load()
org.apache.spark.sql.AnalysisException: Path does not exist: 1;
```
### Why are the changes needed?
This will make the behavior deterministic.
### Does this PR introduce _any_ user-facing change?
Yes, but the previous behavior is indeterministic.
### How was this patch tested?
Pass the newly test cases.
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