[ARROW-9731] [C++][Dataset] Port "head" method from R to C++ Dataset Scanner

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 4.0.0
• Component/s: C++
• Labels: dataset pull-request-available
• External issue URL: https://github.com/apache/arrow/issues/25785
• Assignee: David Li
• Reporter: Joris Van den Bossche
• Created: 13/Aug/20 21:47
• Updated: 11/Jan/23 11:08
• Resolved: 15/Apr/21 18:05

Description

ARROW-9665 (https://github.com/apache/arrow/pull/7913) added amongst other things a head method for Dataset in R:

https://github.com/apache/arrow/blob/586c060c8b1851f1077911fae6d02a10ed83e7fb/r/src/dataset.cpp#L266-L282

It might be nice to move this to C++ and expose it on the python side as well (and since it's written already in C++ on the R side, it should be relatively straightforward to port I assume)

Issue Links

• links to: GitHub Pull Request #9854
• links to: GitHub Pull Request #10047