[ARROW-10216] [Rust] Simd implementation of min/max aggregation kernels for primitive types

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 3.0.0
• Component/s: Rust
• Labels: pull-request-available
• External issue URL: https://github.com/apache/arrow/issues/26218
• Assignee: Jörn Horstmann
• Reporter: Jörn Horstmann
• Created: 07/Oct/20 14:55
• Updated: 11/Jan/23 08:11
• Resolved: 08/Dec/20 06:02

Description

Using a similar approach as the sum kernel (ARROW-10015). Instead of initializing the accumulator with 0 we'd need the largest/smallest possible value for each ArrowNumericType (i.e. u64::MAX or +-Inf)

Pseudo code for min aggregation 

// initialize accumulator
min_acc = +Inf
// aggregate each chunk
min_acc = min(min_acc, select(valid, value, +Inf))

Issue Links

• links to: GitHub Pull Request #8685