[C++][Dataset] Extract format-specific scan options from FileFormat

[asfimport]

Currently format specific scan options are embedded as members of the corresponding subclass of FileFormat. Extracting these to an options struct would provide better separation of concerns; currently the only way to scan a parquet formatted dataset with different options is to reconstruct it in a differently optioned format from its component files.

CsvFileFormat could retain ParseOptions as a member, since (for example) tab-separated vs comma-separated values can justifiably be considered different formats.

Reporter: Ben Kietzman / @bkietz
Assignee: David Li / @lidavidm

Related issues:

• [C++][Dataset] Add ConvertOptions and ReadOptions to CsvFileFormat (relates to)
• [GLib] Add CsvFragmentScanOption support (is related to)
• [R] Accept format-specific scan options in collect() (is related to)
• [C++][Dataset] Extract IpcFragmentScanOptions, ParquetFragmentScanOptions (is related to)

PRs and other links:

• GitHub Pull Request #9686

_{Note: This issue was originally created as ARROW-9749. Please see the migration documentation for further details.}

[asfimport]

Ben Kietzman / @bkietz:
@jorisvandenbossche @fsaintjacques

[asfimport]

Ben Kietzman / @bkietz:
Issue resolved by pull request 9686
#9686