lsy3993 opened a new issue, #13131: URL: https://github.com/apache/doris/issues/13131
### Search before asking - [X] I had searched in the [issues](https://github.com/apache/incubator-doris/issues?q=is%3Aissue) and found no similar issues. ### Description Add a new builtin function named **first_month_day**, the mechanism of this function is the same as **toStartOfMonth** in ClickHouse. ### Syntax first_month_day(datetime) ### Arguments **datetime** — This argument's type could be date, datetime, datev2 or datetimev2 ### Returned values This function return **date** when argument is date or datetime; return **datev2** when argument is datev2 or datetimev2. And this function always returns the month first day, so the output day is always '01'. Input **('2021-12-01')**, it returns **('2021-12-01')**; or Input **('2021-12-31')**, it still returns **('2021-12-01')** ### Solution _No response_ ### Are you willing to submit PR? - [X] Yes I am willing to submit a PR! ### Code of Conduct - [X] I agree to follow this project's [Code of Conduct](https://www.apache.org/foundation/policies/conduct) -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: commits-unsubscr...@doris.apache.org.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: commits-unsubscr...@doris.apache.org For additional commands, e-mail: commits-h...@doris.apache.org
