comphead opened a new issue, #4528:
URL: https://github.com/apache/arrow-datafusion/issues/4528
**Describe the bug**
Faced this when worked with #4385
`date_part` parses nanoseconds correctly
```
test_expression!(
"date_part('nanosecond',
to_timestamp('2020-09-08T12:00:12.12345678+00:00'))",
"12123456780"
);
```
**To Reproduce**
```
test_expression!(
"EXTRACT(nanosecond FROM
to_timestamp('2020-09-08T12:00:12.12345678+00:00'))",
"1212345678"
);
Invalid statement: sql parser error: Expected date/time field, found:
nanosecond
```
**Expected behavior**
Should work
**Additional context**
Add any other context about the problem here.
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