alamb commented on issue #3148:
URL:
https://github.com/apache/arrow-datafusion/issues/3148#issuecomment-1632235091
@liukun4515 there is the `interval` constant syntax:
```
DataFusion CLI v27.0.0
❯ select interval '5 days';
+-------------------------------------------------------+
| IntervalMonthDayNano("92233720368547758080") |
+-------------------------------------------------------+
| 0 years 0 mons 5 days 0 hours 0 mins 0.000000000 secs |
+-------------------------------------------------------+
1 row in set. Query took 0.025 seconds.
```
Also casting strings to intervals handle units
```
❯ select '5 days'::interval;
+-------------------------------------------------------+
| Utf8("5 days") |
+-------------------------------------------------------+
| 0 years 0 mons 5 days 0 hours 0 mins 0.000000000 secs |
+-------------------------------------------------------+
1 row in set. Query took 0.003 seconds.
```
Or creating a string via `||`
```
❯ select (5 || ' days')::interval;
+-------------------------------------------------------+
| Int64(5) || Utf8(" days") |
+-------------------------------------------------------+
| 0 years 0 mons 5 days 0 hours 0 mins 0.000000000 secs |
+-------------------------------------------------------+
1 row in set. Query took 0.004 seconds.
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