PreparedStatementCallback; bad SQL grammar [SELECT JOB_INSTANCE_ID, JOB_NAME from BATCH_JOB_INSTANCE where JOB_NAME = ? and JOB_KEY =?

Question

I want the Spring Batch metadata to be created on the MySQL server and used all the existing tables from Oracle to fetch data from it and put it into the MongoDB.

I created the following configurations, but somehow missing the trick to create the Spring Batch metadata tables though configuration.

spring.data.mongodb.host=localhost
spring.data.mongodb.port=27017
spring.data.mongodb.database=MY_DB

#By default, Spring runs all the job as soon as it has started its context.
spring.batch.job.enabled=false

spring.batch.initialize-schema=always
spring.batch.tablePrefix=test.BATCH_
#spring.batch.initializer.enabled=false
spring.batch.schema=org/springframework/batch/core/schema-mysql.sql

spring.datasource.url=jdbc:oracle:thin:@localhost:1527:OR_DEV
spring.datasource.username=EDR_USR
spring.datasource.password=txz$2Zhr
spring.datasource.driver-class-name=oracle.jdbc.OracleDriver

jdbc.batch.jdbcUrl=jdbc:mysql://localhost:3306/test?useSSL=false
jdbc.batch.username=root
jdbc.batch.password=root
jdbc.batch.driver-class-name=com.mysql.cj.jdbc.Driver

DBConfig.java

@Configuration
@ComponentScan
public class DBConfig {

    @Autowired
    private Environment env;

    @Bean(name="oracleDS")
    public DataSource batchDataSource(){          
           return DataSourceBuilder.create()
                    .url(env.getProperty("spring.datasource.url"))
                    .driverClassName(env.getProperty("spring.datasource.driver-class-name"))
                    .username(env.getProperty("spring.datasource.username"))
                    .password(env.getProperty("spring.datasource.password"))
                    .build();          
    } 

    @Bean(name="mysqlDS")
    @Primary
    public DataSource mysqlBatchDataSource(){          
           return DataSourceBuilder.create()
                    .url(env.getProperty("jdbc.batch.jdbcUrl"))
                    .driverClassName(env.getProperty("jdbc.batch.driver-class-name"))
                    .username(env.getProperty("jdbc.batch.username"))
                    .password(env.getProperty("jdbc.batch.password"))
                    .build();          
    }
}

Job

@GetMapping("/save-student")
    public String saveStudent() {
        JobParameters params = new JobParametersBuilder()
                .addString("JobID", String.valueOf(System.currentTimeMillis()))
                .addString("Job_ID", String.valueOf(System.currentTimeMillis()))
                .addDate("date", new Date())
                .toJobParameters();
        try {
            JobExecution jobExecution = jobLauncher.run(countryJob, params);
            log.debug("Job Status : " + jobExecution.getStatus());
        } catch (JobExecutionAlreadyRunningException | JobRestartException | JobInstanceAlreadyCompleteException
                | JobParametersInvalidException e) {
            log.error("Job Failed : "+e.getMessage());
        }
        return "";
    }

Error:

{
    "timestamp": "2019-03-27T14:57:52.745+0000",
    "status": 500,
    "error": "Internal Server Error",
    "message": "PreparedStatementCallback; bad SQL grammar [SELECT JOB_INSTANCE_ID, JOB_NAME from BATCH_JOB_INSTANCE where JOB_NAME = ? and JOB_KEY = ?]; nested exception is java.sql.SQLSyntaxErrorException: Table 'test.batch_job_instance' doesn't exist",
    "path": "/save-student"
}

Answer 1

To fixed this issue, I executed the MYSQL spring batch metadata tables manually by executing the script from here: MySQL Spring Batch Metadata tables script

Since we've two dataSources, Spring Batch is unable to create the metadata tables automatically and hence this error is coming. I executed the script manually as a workaround, but is there any way to fixed this issue through code?