MaxGekk commented on issue #25981: [SPARK-28420][SQL] Support the `INTERVAL` type in `date_part()` URL: https://github.com/apache/spark/pull/25981#issuecomment-539573527 >> The entire interval's length is returned for EPOCH only, and components for other field values. > Hm, but then back to the original question; why is the answer not 30 below? @srowen Are you asking about the fractional part? Just in case, the function does not return the entire interval length. Look at the example **with the `hours` component:** ```sql spark-sql> SELECT date_part('seconds', interval 5 hours 30 seconds 1 milliseconds 1 microseconds); 30.001001 ```
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