adsharma commented on issue #935:
URL:
https://github.com/apache/arrow-datafusion/issues/935#issuecomment-905826481
Thanks! That was one problem. Fixed now.
But there is a second significant problem:
```
> SELECT TRIM(BOTH 'leadtrail' FROM 'leadtrailtextleadtrail');
+---------------------------------------------------------+
| btrim(Utf8("leadtrailtextleadtrail"),Utf8("leadtrail")) |
+---------------------------------------------------------+
| x |
+---------------------------------------------------------+
1 row in set. Query took 0.008 seconds.
```
MySQL would output "text".
The problem boils down to the interpretation: is it a set of characters or a
string to be trimmed?
Perhaps address this in a new PR?
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