Sysdate changes when number of rows selected are huge

My requirement is that same date and time should be selected for all the rows returned by the query.
Eg: Select empno, ename , sysdate from Emp
If the query runs for more than a second, then the second component of SYSDATE will be different.
What I want is that the query firing time should be selected for all the rows returned by the query.
I hope there should be a way in Oracle to do this

Have you actually seen this happen?
On testing in Oracle 8.1.7i environment with a query
select col1, col2, to_char(sysdate,'hh24:mi:ss')
from big_table;
which returned approx 3m rows and executed for over 8 minutes the sysdate value was the same for the first row selected and the last row selected, and was the time at the start of the query.
Kevin is correct that Oracle gets the the value of Sysdate once when the query is executed and uses that value until the time that a new query is parsed.
HTH
Dave

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