Alternative to EntityFunctions.AddSeconds for MySQL

问题

I need to execute an EF LINQ query that adds some seconds to a datetime against MySQL using the standard Oracle supplied dot net connector. Unfortunately it does not support the EntityFunctions.AddSeconds method. Is there an alternative approach?

var result = (from rec in db.Records where EntityFunctions.AddSeconds(rec.SomeDate, rec.SomeSeconds) select rec).FirstOrDefault();

回答1:

DELIMITER $$
drop function IF EXISTS AddSeconds$$
create function AddSeconds(theDate datetime, seconds int)
RETURNS datetime
DETERMINISTIC
begin
 return DATE_ADD(theDate, INTERVAL seconds SECOND);
end$$

来源：https://stackoverflow.com/questions/12951714/alternative-to-entityfunctions-addseconds-for-mysql