**Reporter**: [Nicola Crane](https://issues.apache.org/jira/browse/ARROW-12868) / @thisisnic **Assignee**: [Nicola Crane](https://issues.apache.org/jira/browse/ARROW-12868) / @thisisnic #### Related issues: - [[C++] Substring find position kernel](https://github.com/apache/arrow/issues/28460) (depends upon) - [[C++] Add find_substring_regex kernel and implement ignore_case for find_substring](https://github.com/apache/arrow/issues/28857) (depends upon) #### PRs and other links: - [GitHub Pull Request #10588](https://github.com/apache/arrow/pull/10588) <sub>**Note**: *This issue was originally created as [ARROW-12868](https://issues.apache.org/jira/browse/ARROW-12868). Please see the [migration documentation](https://github.com/apache/arrow/issues/14542) for further details.*</sub>