Subtract times

The result of subtracting one time (TIME2) from another (TIME1) is a time duration that specifies the number of hours, minutes, and seconds between the two times.

The data type of the result is DECIMAL(6,0). If TIME1 is greater than or equal to TIME2, TIME2 is subtracted from TIME1. If TIME1 is less than TIME2, however, TIME1 is subtracted from TIME2, and the sign of the result is made negative. The following procedural description clarifies the steps involved in the operation RESULT = TIME1 - TIME2.

If %SECOND(TIME2) <= %SECOND(TIME1) ;
    then %SECOND(RESULT) = %SECOND(TIME1) - %SECOND(TIME2).

If %SECOND(TIME2) > %SECOND(TIME1) ;
    then %SECOND(RESULT) = 60 + %SECOND(TIME1) - %SECOND(TIME2). ;
    %MINUTE(TIME2) is then incremented by 1.

If %MINUTE(TIME2) <= %MINUTE(TIME1) ;
    then %MINUTE(RESULT) = %MINUTE(TIME1) - %MINUTE(TIME2).

If %MINUTE(TIME2) > %MINUTE(TIME1) ;
    then %MINUTE(RESULT) = 60 + %MINUTE(TIME1) - %MINUTE(TIME2). ;
    %HOUR(TIME2) is then incremented by 1.

%HOUR(RESULT) = %HOUR(TIME1) - %HOUR(TIME2).

For example, the result of %TIME('11:02:26') - '00:32:56' is 102930 (a duration of 10 hours, 29 minutes, and 30 seconds).