Github user rdblue commented on the issue:
https://github.com/apache/spark/pull/20387
> Let's keep it general and let the data source to interprete it.
I think this is the wrong approach. The reason why we are using a special
`DataSourceOptions` object is to ensure that data sources consistently ignore
case when reading **their own options**. Consistency across data sources
matters and we should be pushing for more consistency, not less.
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