apache
[SPARK-48219][CORE] StreamReader Charset fix with UTF8
What changes were proposed in this pull request?
Fix some StreamReader not set with UTF8，if we actually default charset not support Chinese chars such as latin and conf contain Chinese chars，it would not resolve success，so we need set it as utf8 in StreamReader，we can find all StreamReader with utf8 charset in other compute framework，such as Calcite、Hive、Hudi and so on.
Why are the changes needed?
May cause string decode not as expected
Does this PR introduce any user-facing change?
Yes
How was this patch tested?
Not need
Was this patch authored or co-authored using generative AI tooling?
No
Do you think you can provide a test coverage to protect your contribution from potential future regression, @xuzifu666 ?
Not need
@dongjoon-hyun Thanks for your attentions，In my option this code change not need to provide tests for it's a specification for ReadStream usage，if not set utf8 charset may occur error when system default charset not contains Chinese Chars. You can refer it in other framework such as Calcite，Hive，all set utf8 when InputStreamReader constructor method be called.
The change itself looks reasonable to me. I also agree with @dongjoon-hyun that we shall add a simple test, maybe in XSDToSchemaSuite.
BTW, the PR is tagged as CORE but the changes belong to XML of sql datasource and hive thriftserver
XSDtoSchema would not modify it， than HiveImpl had also changed can refer recent pr: https://github.com/apache/hive/pull/5243 so I Think it is nesscery to change it？ @yaooqinn @HyukjinKwon