[ARROW-15032] [C++] Compute Function to return Year / Month / Day

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 7.0.0
• Component/s: C++
• Labels: kernel pull-request-available
• External issue URL: https://github.com/apache/arrow/issues/18986
• Assignee: Will Ayd
• Reporter: Will Ayd
• Created: 08/Dec/21 19:18
• Updated: 11/Jan/23 08:44
• Resolved: 05/Jan/22 01:35

Description

Related to

https://stackoverflow.com/questions/70194714/how-to-return-a-structarray-from-multiple-scalar-functions/70213443#70213443

 

Right now the temporal compute functions include year / month / day as separate functions. AFAICT in the implementation these all internally create a struct containing year/month/day using the date library and then return only one of the components.

 

From a pure efficiency perspective it might be best to just return all as one StructArray and allow the user to unpack the values. From a user perspective, I also typically want year / month / day to be bundled together, so one function call to get all three in one pass would be ideal

 

This might be extendable down to the timestamp structure as well

Issue Links

• links to: GitHub Pull Request #11990