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## What changes were proposed in this pull request? Improved the documentation for the datetime functions in `org.apache.spark.sql.functions` by adding details about the supported column input types, the column return type, behaviour on invalid input, supporting examples and clarifications. ## How was this patch tested? Manually testing each of the datetime functions with different input to ensure that the corresponding Javadoc/Scaladoc matches the behaviour of the function. Successfully ran the `unidoc` SBT process. Closes #20901 from abradbury/SPARK-23792. Authored-by: Adam Bradbury <abradbury@users.noreply.github.com> Signed-off-by: Sean Owen <sean.owen@databricks.com> |
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