oracle systimestamp (sysdate) to milliseconds

Question

Could you provide implementation of stored function to get current systimestamp as milliseconds.
Something I can use like

select current_tim         


        

Answer 1

The best thing I know of is:

select extract(day    from (systimestamp - timestamp '1970-01-01 00:00:00')) * 86400000
     + extract(hour   from (systimestamp - timestamp '1970-01-01 00:00:00')) * 3600000
     + extract(minute from (systimestamp - timestamp '1970-01-01 00:00:00')) * 60000
     + extract(second from (systimestamp - timestamp '1970-01-01 00:00:00')) * 1000 unix_time
from dual;

I'm not quite sure what requirements you have regarding time zone. You might need to make minor adjustments for that.