salix/db/routines/util/functions/firstDayOfMonth.sql

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DELIMITER $$
CREATE OR REPLACE DEFINER=`root`@`localhost` FUNCTION `util`.`firstDayOfMonth`(vDate DATE)
RETURNS date
DETERMINISTIC
NO SQL
BEGIN
/**
* Returns the date formatted to the first day of month.
*
* @param vDate The date to format
* @return The formatted date
*/
RETURN TIMESTAMPADD(DAY, - DAY(vDate) + 1, vDate) ;
END$$
DELIMITER ;