[ARROW-14289] [C++] Change Scanner::Head to return a RecordBatchReader

• Type: Improvement
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Component/s: C++, R
• External issue URL: https://github.com/apache/arrow/issues/29864
• Assignee: Unassigned
• Reporter: Neal Richardson
• Created: 11/Oct/21 17:36
• Updated: 11/Jan/23 08:38

Description

Following ARROW-9731 and ARROW-13893. This would make it more natural to work with ExecPlans that return a RecordBatchReader when you Run them. Alternatively, we could move the business to RecordBatchReader::Head.