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What's changed and what's your intention?

For parquet file source, we use RecordBatchStream to read parquet file, and it's offset represents the current row read, not the bytes. The fetch executor determines whether a file has been read completely by comparing the offset with the file size, where the file size is obtained during the list process.

This pr modifies the semantics of the size of OpendalFsSplit in the parquet file, expressing it as the total number of rows in a parquet file. Specifically, before constructing OpendalFsSplit each time a file name is obtained, the metadata of the parquet file is read to obtain the total number of rows.

Todo:

• add more comments
• error handling

Checklist

• I have written necessary rustdoc comments
• I have added necessary unit tests and integration tests
• I have added test labels as necessary. See details.
• I have added fuzzing tests or opened an issue to track them. (Optional, recommended for new SQL features Sqlsmith: Sql feature generation #7934).
• My PR contains breaking changes. (If it deprecates some features, please create a tracking issue to remove them in the future).
• All checks passed in ./risedev check (or alias, ./risedev c)
• My PR changes performance-critical code. (Please run macro/micro-benchmarks and show the results.)

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Documentation

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Release note

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