If you must create many jobs, then you may be able to reduce transaction overhead and experience a performance gain if you use the CREATE_JOBS procedure. Creating Multiple Jobs in a Single Transaction.SET_JOB_ANYDATA_VALUE is used for complex data types that cannot be represented as a VARCHAR2 string.Īfter creating a job, you can set additional job attributes or change attribute values by using the SET_ATTRIBUTE or SET_JOB_ATTRIBUTES procedures.Ī detached job must point to a program object (program) that has its detached attribute set to TRUE. To set job arguments, use the SET_JOB_ARGUMENT_VALUE or SET_JOB_ANYDATA_VALUE procedures or Cloud Control. You can create a job that runs on multiple destinations, but that is managed from a single location. A job with a NULL destination_name attribute runs on the host where the job is created. Oracle Scheduler requires job credentials to authenticate with an Oracle database or the operating system before running.įor remote external jobs and remote database jobs, you specify the job destination by creating a destination object and assigning it to the destination_name job attribute. Specifying Job Actions, Schedules, Programs, and Stylesīecause the CREATE_JOB procedure is overloaded, there are several different ways of using it.You create one or more jobs using the DBMS_SCHEDULER.CREATE_JOB or DBMS_SCHEDULER.CREATE_JOBS procedures or Cloud Control. You copy a job using the COPY_JOB procedure in the DBMS_SCHEDULER or Cloud Control. You enable one or more jobs by using the ENABLE procedure in the DBMS_SCHEDULER package or Cloud Control. You disable one or more jobs using the DISABLE procedure in the DBMS_SCHEDULER package or Cloud Control. When you specify multiple jobs to drop, the commit_semantics argument of the DBMS_SCHEDULER.DROP_JOB procedure determines the outcome if an error occurs on one of the jobs. You can modify this default behavior by setting either the force or defer option. If a job is running at the time of the DROP_JOB procedure call, then attempting to drop the job fails. You drop one or more jobs using the DROP_JOB procedure in the DBMS_SCHEDULER package or Cloud Control. If a job that points to a running chain is stopped, then all steps of the chain that are running are stopped. The Scheduler offers implementors of external jobs a mechanism to gracefully clean up after their external jobs when STOP_JOB is called with force set to FALSE. You stop one or more running jobs using the STOP_JOB procedure in the DBMS_SCHEDULER package or Cloud Control. You do so using the SET_ATTRIBUTE, SET_ATTRIBUTE_NULL, or SET_JOB_ATTRIBUTESprocedures in the DBMS_SCHEDULER package or Cloud Control.Ī job can be run in several different ways. You alter a job by modifying its attributes. You create jobs using the DBMS_SCHEDULER package or Cloud Control. You use procedures in the DBMS_SCHEDULER package to administer common job tasks. You can monitor jobs in several different ways. In addition, job classes enable you to set relative priorities among a group of jobs if all jobs in the group are allocated identical resource levels. This, in turn, controls the amount of resources allocated to these jobs. These objects prioritize jobs by associating jobs with database resource manager consumer groups. You prioritize Oracle Scheduler jobs using three Scheduler objects: job classes, windows, and window groups. You can create and alter resources available for use by jobs, and control how many of a specified resource are available to a job. An event is a message one application or system process sends to another.Ī job chain is a named series of tasks that are linked together for a combined objective.Īn incompatibility definition (or, incompatibility) specifies incompatible jobs or programs, where only one of the group can be running at a time. Oracle Scheduler can start a job when an event is sent. Schedules can be shared among users by creating and saving them as objects in the database. You optionally use a schedule object (a schedule) to define when a job should be run.
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