Incorrect value rounding when working with intervals.

[kworr]

I tried to graph database process delays with:

select time_to_sec(timediff(now(), last_update)) as time_skew from some_table;

The code always works for me when executed from MySQL console, however when I try to query metrics I sometimes get:

time_skew 3.020399e+06

The value itself never exceeeds 1000.