jorisvandenbossche commented on PR #39264:
URL: https://github.com/apache/arrow/pull/39264#issuecomment-1881422694
I personally wasn't aware of this specific behaviour of Python, and I don't
think we necessarily need to replicate it exactly. Is there a typical use case
for this?
For another data point: Postgres doesn't seem to have this behaviour, but
rather matches nothing for an empty string:
```
test_db=# SELECT replace('test', 't', 'z');
replace
---------
zesz
(1 row)
test_db=# SELECT replace('test', '', 'z');
replace
---------
test
(1 row)
```
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