regexp_match does not appear to return matches

[alamb]

Describe the bug
regexp_match appears to return an empty list rather than the part of the string matched.

To Reproduce

Using datafusion-cli

❯ create table foo as values ('foo'), ('bar'), ('foobar');
0 rows in set. Query took 0.000 seconds.
❯ select * from foo;
+---------+
| column1 |
+---------+
| foo     |
| bar     |
| foobar  |
+---------+
❯ select regexp_match(column1, 'foo') from foo;
+--------------------------------------+
| regexpmatch(foo.column1,Utf8("foo")) |
+--------------------------------------+
| []                                   |. <-- note this is empty, not 'foo'!
|                                      |
| []                                   |. <-- this too!
+--------------------------------------+
3 rows in set. Query took 0.001 seconds.

Expected behavior
I expect the result to be two lists of foo, like postgres:

postgres=# create table foo as values ('foo'), ('bar'), ('foobar');
SELECT 3
postgres=# select * from foo;
 column1
---------
 foo
 bar
 foobar
(3 rows)

postgres=# select regexp_match(column1, 'foo') from foo;
 regexp_match
--------------
 {foo}

 {foo}
(3 rows)

Additional context

Found by @sanderson on influxdata/docs-v2#4774

[Jefffrey]

Upstream arrow-rs issue has been raised

[Jefffrey]

Upstream issue fixed by apache/arrow-rs#3807

This issue now depends on next arrow-rs version update

[Jefffrey]

Issue resolved as of latest main by arrow-rs update: #5685

DataFusion CLI v21.0.0
❯ create table foo as values ('foo'), ('bar'), ('foobar');
0 rows in set. Query took 0.009 seconds.
❯ select regexp_match(column1, 'foo') from foo;
+--------------------------------------+
| regexpmatch(foo.column1,Utf8("foo")) |
+--------------------------------------+
| [foo]                                |
|                                      |
| [foo]                                |
+--------------------------------------+
3 rows in set. Query took 0.004 seconds.
❯

@alamb

[alamb]

Thanks @Jefffrey -- closing