How to view Oracle job logs

Question

Oracle 10g:
I have following job:
procedure create_or_replace_job as
begin
begin
dbms_scheduler.drop_job(job_name => merge_job_name);
exception
when others then
/* ignore */
commit;
end;
dbms_scheduler.create_job(job_name => merge_job_name,
job_type => 'STORED_PROCEDURE',
job_action => merge_proc_name,
start_date => to_timestamp('01-Jan-1970 ' || merge_job_time,
'DD-Mon-RRRR HH24:MI:SS'),
repeat_interval => 'FREQ = DAILY; INTERVAL = 1');
commit;
end;
But I want to see when job ran and if there were any errors.

Answer 1

I am looking at how long it took for "GATHER_STATS_JOB" to run also when it started and when it ended. But none of the views that I queried give me that detail. I tried:
select * from dba_scheduler_job_run_details where job_name = 'GATHER_STATS_JOB' order by log_id desc
LOG_ID     LOG_DATE     OWNER     JOB_NAME     JOB_SUBNAME     STATUS     ERROR#     REQ_START_DATE     ACTUAL_START_DATE     RUN_DURATION     INSTANCE_ID     SESSION_ID     SLAVE_PID     CPU_USED     ADDITIONAL_INFO     
1741          SYS     GATHER_STATS_JOB     <NULL>     SUCCEEDED     0     <NULL>               1     2316,20537     25785          <NULL>     
select * from dba_scheduler_jobs
OWNER     JOB_NAME     JOB_SUBNAME     JOB_CREATOR     CLIENT_ID     GLOBAL_UID     PROGRAM_OWNER     PROGRAM_NAME     JOB_TYPE     JOB_ACTION     NUMBER_OF_ARGUMENTS     SCHEDULE_OWNER     SCHEDULE_NAME     SCHEDULE_TYPE     START_DATE     REPEAT_INTERVAL     EVENT_QUEUE_OWNER     EVENT_QUEUE_NAME     EVENT_QUEUE_AGENT     EVENT_CONDITION     EVENT_RULE     END_DATE     JOB_CLASS     ENABLED     AUTO_DROP     RESTARTABLE     STATE     JOB_PRIORITY     RUN_COUNT     MAX_RUNS     FAILURE_COUNT     MAX_FAILURES     RETRY_COUNT     LAST_START_DATE     LAST_RUN_DURATION     NEXT_RUN_DATE     SCHEDULE_LIMIT     MAX_RUN_DURATION     LOGGING_LEVEL     STOP_ON_WINDOW_CLOSE     INSTANCE_STICKINESS     RAISE_EVENTS     SYSTEM     JOB_WEIGHT     NLS_ENV     SOURCE     DESTINATION     COMMENTS     FLAGS     
SYS     GATHER_STATS_JOB     <NULL>     SYS     <NULL>     <NULL>     SYS     GATHER_STATS_PROG     <NULL>     <NULL>     <NULL>     SYS     MAINTENANCE_WINDOW_GROUP     WINDOW_GROUP     <NULL>     <NULL>     <NULL>     <NULL>     <NULL>     <NULL>     <NULL>     <NULL>     AUTO_TASKS_JOB_CLASS     TRUE     FALSE     TRUE     SCHEDULED     3     125     <NULL>     0     <NULL>     0               <NULL>     <NULL>     <NULL>     RUNS     TRUE     TRUE     <NULL>     TRUE     1     NLS_LANGUAGE='AMERICAN' NLS_TERRITORY='AMERICA' NLS_CURRENCY='$' NLS_ISO_CURRENCY='AMERICA' NLS_NUMERIC_CHARACTERS='.,' NLS_CALENDAR='GREGORIAN' NLS_DATE_FORMAT='DD-MON-RR' NLS_DATE_LANGUAGE='AMERICAN' NLS_SORT='BINARY' NLS_TIME_FORMAT='HH.MI.SSXFF AM' NLS_TIMESTAMP_FORMAT='DD-MON-RR HH.MI.SSXFF AM' NLS_TIME_TZ_FORMAT='HH.MI.SSXFF AM TZR' NLS_TIMESTAMP_TZ_FORMAT='DD-MON-RR HH.MI.SSXFF AM TZR' NLS_DUAL_CURRENCY='$' NLS_COMP='BINARY' NLS_LENGTH_SEMANTICS='BYTE' NLS_NCHAR_CONV_EXCP='FALSE'     <NULL>     <NULL>     Oracle defined automatic optimizer statistics collection job     21074010     
select * from dba_schedular_schedules
OWNER     SCHEDULE_NAME     SCHEDULE_TYPE     START_DATE     REPEAT_INTERVAL     EVENT_QUEUE_OWNER     EVENT_QUEUE_NAME     EVENT_QUEUE_AGENT     EVENT_CONDITION     END_DATE     COMMENTS     
SYS     DAILY_PURGE_SCHEDULE     CALENDAR     <NULL>     freq=daily;byhour=3;byminute=0;bysecond=0     <NULL>     <NULL>     <NULL>     <NULL>     <NULL>     <NULL>