[ARROW-10557] [C++] Add scalar string slicing/substring extract kernel

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 5.0.0
• Component/s: C++
• Labels: pull-request-available
• External issue URL: https://github.com/apache/arrow/issues/26522
• Assignee: Maarten Breddels
• Reporter: Maarten Breddels
• Created: 11/Nov/20 11:45
• Updated: 11/Jan/23 08:14
• Resolved: 07/Jun/21 14:31

Description

This should implement slicing scalar string values of strings arrays with Python semantics with start, stop ,step arguments. This may seem similar to lists, or binary array, but the string length semantics enter into this kernel, which does not need to equal the number of bytes, nor the number of codepoints (accents, etc should be skipped).

 

Issue Links

• is a child of: ARROW-555 [C++] String algorithm library for StringArray/BinaryArray
• is depended upon by: ARROW-10305 [R] Filter with regular expressions
• is related to: ARROW-12948 [C++] Add string slice replace kernel
• requires: ARROW-9128 [C++] Implement string space trimming kernels: trim, ltrim, and rtrim
• links to: GitHub Pull Request #9000