MaxGekk opened a new pull request #27264: [SPARK-30554][SQL] Return `Iterable` from `FailureSafeParser.rawParser` URL: https://github.com/apache/spark/pull/27264 ### What changes were proposed in this pull request? Changed signature of `rawParser` passed to `FailureSafeParser`. I propose to change return type from `Seq` to `Iterable`. I took `Iterable` to easier port the changes on Scala collections 2.13. Also, I replace `Seq` by `Option` in CSV datasource - `UnivocityParser`, and in JSON parser exception one place in the case when specified schema is `StructType`, and JSON input is an array. ### Why are the changes needed? `Seq` is unnecessary requirement for return type from rawParser which may not have multiple rows per input like CSV datasource. ### Does this PR introduce any user-facing change? No ### How was this patch tested? By existing test suites `JsonSuite`, `UnivocityParserSuite`, `JsonFunctionsSuite`, `JsonExpressionsSuite`, `CsvSuite`, and `CsvFunctionsSuite`.
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