[ARROW-4497] [C++] Determine how we want to handle hashing of floating point edge cases

• Type: Bug
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Component/s: C++
• Labels: analytics
• External issue URL: https://github.com/apache/arrow/issues/21050
• Assignee: Unassigned
• Reporter: Micah Kornfield
• Created: 07/Feb/19 09:32
• Updated: 11/Jan/23 07:34

Description

We should document expected behavior or implement improvements to hashing floating point code:
1. -0.0 and 0.0 (should these be collapsed to 0.0)
2. NaN (Should we reduce to a single canonical version).