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https://issues.apache.org/jira/browse/ARROW-13157?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17369031#comment-17369031
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Ian Cook commented on ARROW-13157:
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RE2 also treats everything between {{\Q}} and {{\E}} in a regex as literal
text, although then you need to escape literal {{\E}} in the search string.
> [C++] Implement ignore_case option for find_substring
> ------------------------------------------------------
>
> Key: ARROW-13157
> URL: https://issues.apache.org/jira/browse/ARROW-13157
> Project: Apache Arrow
> Issue Type: New Feature
> Components: C++
> Reporter: Nic Crane
> Assignee: David Li
> Priority: Major
> Labels: pull-request-available
> Time Spent: 20m
> Remaining Estimate: 0h
>
> The find_substring compute function uses the MatchSubstringOptions Options
> class. However, when I try to set ignore_case to TRUE, I get the following
> error:
> {code:java}
> Error: NotImplemented: find_substring with ignore_case
> {code}
> R code to replicate the error is below, though depends on a currently
> unmerged branch:
> {code:java}
> df <- tibble(x = c("Foo and Bar", "baz and qux and quux"))
> df %>%
> Table$create() %>%
> mutate(x = arrow_find_substring(x, options = list(pattern = "b",
> ignore_case = TRUE))) %>%
> collect()
> {code}
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