BATCH_JOB_INSTANCE

The BATCH_JOB_INSTANCE table holds all information relevant to a JobInstance, and serves as the top of the overall hierarchy. The following generic DDL statement is used to create it:

CREATE TABLE BATCH_JOB_INSTANCE  (
  JOB_INSTANCE_ID BIGINT  PRIMARY KEY ,
  VERSION BIGINT,
  JOB_NAME VARCHAR(100) NOT NULL ,
  JOB_KEY VARCHAR(2500)
);

Below are descriptions of each column in the table:

JOB_INSTANCE_ID: The unique id that will identify the instance, which is also the primary key. The value of this column should be obtainable by calling the getId method on JobInstance.
VERSION: See above section.
JOB_NAME: Name of the job obtained from the Job object. Because it is required to identify the instance, it must not be null.
JOB_KEY: A serialization of the JobParameters that uniquely identifies separate instances of the same job from one another. (JobInstances with the same job name must have different JobParameters, and thus, different JOB_KEY values).