ORA-12012: The "Error on Auto Execute of Job" Error

ORA-12012: The "Error on Auto Execute of Job" Error

*** SESSION ID:(518.17367) 2025-08-05T13:09:10.940157-07:00

*** CLIENT ID:(83844258) 2025-08-05T13:09:10.940162-07:00

*** SERVICE NAME:(SYS$USERS) 2025-08-05T13:09:10.940166-07:00

*** MODULE NAME:(DBMS_SCHEDULER) 2025-08-05T13:09:10.940170-07:00

*** ACTION NAME:(DBMS_JOB$_595610) 2025-08-05T13:09:10.940173-07:00

*** CLIENT DRIVER:(SERVER) 2025-08-05T13:09:10.940175-07:00

*** CONTAINER ID:(3) 2025-08-05T13:09:10.940179-07:00

ORA-12012: error on auto execute of job "SYS"."DBMS_JOB$_595610"

<error barrier> at 0x7ffc02180670 placed jslv.c@1951

ORA-00942: table or view does not exist

ORA-06512: at line 1

*** SESSION ID:(518.3132) 2025-08-05T13:09:11.251423-07:00

*** CLIENT ID:(83844258) 2025-08-05T13:09:11.251442-07:00

*** SERVICE NAME:(SYS$USERS) 2025-08-05T13:09:11.251446-07:00

*** MODULE NAME:(DBMS_SCHEDULER) 2025-08-05T13:09:11.251450-07:00

*** ACTION NAME:(DBMS_JOB$_595611) 2025-08-05T13:09:11.251453-07:00

*** CONTAINER ID:(3) 2025-08-05T13:09:11.251456-07:00

*** 2025-08-05T13:09:11.251394-07:00 (EBSPROD(3))

ORA-12012: error on auto execute of job "SYS"."DBMS_JOB$_595611"

<error barrier> at 0x7ffc02180670 placed jslv.c@1951

ORA-00942: table or view does not exist

ORA-06512: at line 1

The ORA-12012 error is a common yet often overlooked issue that signals a failure in an automated database job. While the error itself simply states that a job failed to execute, the real problem lies in the accompanying errors, which provide the crucial details needed for diagnosis. The log snippet you've provided, which pairs ORA-12012 with the fundamental ORA-00942: table or view does not exist, points to a specific and fixable problem: a scheduled job is trying to access a table or view that it can't find. This guide will provide a detailed explanation of the error, a systematic approach to diagnosis, and the precise steps to resolve the issue.

The Foundation: Automated Jobs and Privilege Management

To understand ORA-12012, you must be familiar with Oracle's job scheduling mechanisms and how they interact with security.

1. Job Schedulers (DBMS_SCHEDULER / DBMS_JOB): These are built-in Oracle packages that allow you to automate tasks (e.g., nightly reports, data purging, or maintenance scripts) to run at specific intervals. The log you provided shows jobs running under DBMS_SCHEDULER.

2. Job Owner and Privileges: Every job is owned by a specific user (in your case, SYS is the owner of the job, although the job's code might execute under a different user's context). The job can only perform actions that the user has been granted privileges for. The log clearly states SESSION ID:(518.17367) and CLIENT ID:(83844258), indicating the session and client that initiated the job. The ACTION NAME (DBMS_JOB$_595610) is the internal name given to the job.

3. ORA-00942 ("table or view does not exist"): This is the root cause. This error means that when the scheduled job executed its code, it attempted to reference a table or view that either does not exist or, more likely, is not accessible to the user context running the job.

The combination of these errors tells a clear story: an automated job attempted to run a piece of code, and that code failed because of a privilege issue or an object name resolution problem.

The Breakdown: Why the Job Fails

The job fails with ORA-00942 for a few primary reasons:

1. Missing Table or View: The most straightforward cause. The table or view referenced in the job's code was dropped or renamed after the job was created.

2. Insufficient Privileges (Most Common Cause): The job is running under a user context that does not have the necessary privileges to access the table or view. The log shows SYS as the owner, but the job's code may be referencing a table in another schema without the correct schema.tablename prefix, or the user has not been granted the required privileges (e.g., a SELECT privilege on the table).

3. Synonym/Object Name Resolution: The job's code relies on a private synonym that was dropped, or it's trying to use a public synonym, but a private object with the same name exists, causing a conflict.

4. Schema Name Omission: The job's code references a table without a schema prefix (e.g., SELECT * FROM my_table; instead of SELECT * FROM my_schema.my_table;), and the user running the job is not in the my_schema context.

Diagnosis: Pinpointing the Problem

To fix this, you must find out what the job is trying to do and why it's failing.

1. Identify the Job's Code: The DBMS_JOB$_ number from the alert log is a temporary ID. You need to find the actual DBMS_SCHEDULER job.

   • Use the OWNER and JOB_NAME from the log (SYS is the owner, but the JOB_NAME is the internal ID).

   • Look at the USER_SCHEDULER_JOBS or DBA_SCHEDULER_JOBS view.

   SQL

   SELECT owner, job_name, job_action
   FROM dba_scheduler_jobs
   WHERE job_name = 'DBMS_JOB$_595610';
   -- The output of job_action will show you the PL/SQL code it's trying to run.
   

   This will reveal the exact code that is failing.

2. Identify the User Context: Check who the job is running as. In DBMS_SCHEDULER, a job has a CREDENTIAL_NAME or runs as the OWNER. If the job is owned by SYS but runs an action in another user's context (which is common), you'll need to check the privileges of that user.

3. Test the Code Manually: Take the job_action code you found and try to run it manually as the user who owns or runs the job.

   SQL

   -- Log in as the job's owner or user.
   -- Execute the code from job_action.
   BEGIN
     -- your job's code
   END;
   /
   

   This manual execution will immediately reproduce the ORA-00942 error and tell you exactly which table or view is missing.

4. Check Table Existence and Privileges:

   • Does the table exist? SELECT * FROM dba_tables WHERE table_name = 'THE_MISSING_TABLE';

   • Does the user have the necessary privileges? SELECT * FROM dba_tab_privs WHERE table_name = 'THE_MISSING_TABLE' AND grantee = 'THE_JOB_USER';

Resolution: A Practical Guide

Once you've identified the root cause, the solution is straightforward.

1. If the Table is Missing:

   • Recreate the table if it was dropped accidentally.

   • If the table name is wrong in the job's code, you need to update the job definition.

   SQL

   EXEC DBMS_SCHEDULER.SET_ATTRIBUTE ('job_name_here', 'job_action', 'new_correct_code_here');
   

2. If Privileges are Insufficient:

   • Grant the missing privilege: The simplest solution is to grant the necessary privilege to the user who runs the job.

   SQL

   GRANT SELECT ON my_schema.my_table TO job_owner_or_user;
   -- Make sure to grant it directly to the user, not a role, unless the role is activated explicitly.
   

   • Use schema.tablename: If the job's code isn't using the schema prefix, and the user's default schema is not the correct one, you must update the job's code to explicitly reference the table with its schema.

3. If the Job is Obsolete:

   • If the job is no longer needed, simply disable or drop it.

   SQL

   EXEC DBMS_SCHEDULER.DISABLE('job_name_here');
   -- or
   EXEC DBMS_SCHEDULER.DROP_JOB('job_name_here');
   

Video Resources

• Oracle Scheduler Job Management

  • https://www.youtube.com/watch?v=kYx8D9T6Y5c

• Managing Oracle User Privileges

  • https://www.youtube.com/watch?v=F07gq-0w4aQ

Conclusion

The ORA-12012 error is a notification of a job failure, but the real diagnostic work begins with the accompanying errors. By systematically investigating the job's code (job_action), the user context it runs under, and the existence and permissions of the tables and views it tries to access, you can quickly and confidently resolve the issue. The key to prevention is to always ensure that scheduled jobs have the proper privileges and that their code correctly references all database objects.