Omega359 commented on issue #15872:
URL: https://github.com/apache/datafusion/issues/15872#issuecomment-2843008738
Can someone update the title of this issue to reflect the true nature of the
enhancement? I don't think this has anything specifically to do with
regexp_match except that was how it was uncovered...
```sql
> create table test (a int, b varchar) as values (1, 'one'), (2, 'two'),
(3, 'three');
> select regexp_match(test.b, '(.){4,}') from test;
+--------------------------------------+
| regexp_match(test.b,Utf8("(.){4,}")) |
+--------------------------------------+
| NULL |
| NULL |
| [e] |
+--------------------------------------+
3 row(s) fetched.
Elapsed 0.001 seconds.
> select regexp_match(test.b, '\\s-O\\s') from test;
+-------------------------------------+
| regexp_match(test.b,Utf8("\s-O\s")) |
+-------------------------------------+
| NULL |
| NULL |
| NULL |
+-------------------------------------+
3 row(s) fetched.
Elapsed 0.005 seconds.
```
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