Question

I have the following sql statement:

start_time = ADDDATE(start_time, INTERVAL $minuteDelta MINUTE), 
end_time   = ADDDATE(end_time, INTERVAL $minuteDelta MINUTE)

start_time and end_time are both time fields in my database (not datetime)

$minuteDelta is 60 for argument’s sake

Right now it doesn’t throw an error but resets my time fields to 00:00:00. Shouldn’t this work? ADDTIME doesn’t work because it doesn’t accept an interval which is what my jQuery plugin is giving me (an interval). start_time and end_time have some value like 14:00:00 let’s say.

I have a similar statement where I’m adding days to a date and it works fine. What’s my problem here folks?

EDIT

Entire query

UPDATE events 
    SET start_date = DATE_ADD(start_date, INTERVAL 0 DAY), 
        end_date = DATE_ADD(end_date, INTERVAL 0 DAY), 
        start_time = ADDDATE(start_time, INTERVAL 60 MINUTE),
        end_time = ADDDATE(end_time, INTERVAL 60 MINUTE) 
    WHERE id='1'

Answer 1

Try this:

$secondDelta = $minuteDelta * 60;

start_time = ADDTIME(start_time, SEC_TO_TIME($secondDelta)),
end_time = ADDTIME(end_time, SEC_TO_TIME($secondDelta))