Nic Crane created ARROW-13157:
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             Summary: [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


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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