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## What changes were proposed in this pull request? In the PR, I propose to use the `plusMonths()` method of `LocalDate` to add months to a date. This method adds the specified amount to the months field of `LocalDate` in three steps: 1. Add the input months to the month-of-year field 2. Check if the resulting date would be invalid 3. Adjust the day-of-month to the last valid day if necessary The difference between current behavior and propose one is in handling the last day of month in the original date. For example, adding 1 month to `2019-02-28` will produce `2019-03-28` comparing to the current implementation where the result is `2019-03-31`. The proposed behavior is implemented in MySQL and PostgreSQL. ## How was this patch tested? By existing test suites `DateExpressionsSuite`, `DateFunctionsSuite` and `DateTimeUtilsSuite`. Closes #25153 from MaxGekk/add-months. Authored-by: Maxim Gekk <max.gekk@gmail.com> Signed-off-by: Wenchen Fan <wenchen@databricks.com> |
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