[ARROW-1896] [C++] Do not allocate memory for primitive outputs in CastKernel::Call implementation

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.13.0
• Component/s: C++
• Labels: pull-request-available
• External issue URL: https://github.com/apache/arrow/issues/17889
• Assignee: Wes McKinney
• Reporter: Wes McKinney
• Created: 06/Dec/17 21:44
• Updated: 11/Jan/23 07:17
• Resolved: 15/Feb/19 04:56

Description

This is some refactoring / tidying. Unless an output of cast has a non-determinate size (e.g. is Binary or something else), the CastKernel::Call implementation should assume that it is writing into pre-allocated memory. The corresponding memory allocation can be lifted into the arrow::compute::Cast API

Issue Links

• links to: GitHub Pull Request #3642