Mybatis Spring Batch：如何在Tasklet中使用where子句从多张表中删除？

Question

I want to do multiple deletes from various tables like this :

DELETE FROM TABLE1 WHERE T1_ID = :id AND T1_CREATION_DATE IS NULL;
DELETE FROM TABLE2 WHERE T2_ID = :id AND T2_CREATION_DATE IS NULL;
COMMIT;

but with spring batch.

so far I tried :

String query = "DELETE FROM TABLE1 WHERE T1_ID = :id AND T1_CREATION_DATE IS NULL;"+
"DELETE FROM TABLE2 WHERE T2_ID = :id AND T2_CREATION_DATE IS NULL;"+
"COMMIT;";

@Override
public RepeatStatus execute(StepContribution contribution, ChunkContext chunkContext) throws Exception {

    jobContext = stepExecution.getJobExecution().getExecutionContext();

    Employee employee = (Employee) jobContext.get("employee");

    Map<String, Object> parameters = new HashMap<String, Object>();

    parameters.put("id", employee.getId());

    new NamedParameterJdbcTemplate(dataSource).update(query,parameters);

    return RepeatStatus.FINISHED;
}

it is compiling but i got a bad SQL grammar exception, i think it is because JdbcTemplates does not manage transactionnal query.

Any hint ?

PS : for my readers and writers I use Mybatis, is there a way he can handle the multiple delete ? I tried but I was unable to use mybatis sql statement in the Tasklet

Answer 1

Thanks to your help, i managed to make it work.

at first, i did it with separate templates like this :

protected String expDelete = "DELETE FROM TABLE1 WHERE ID = :id AND CREATION_DATE IS NULL";
protected String dipDelete = "DELETE FROM TABLE2 WHERE ID = :id AND CREATION_DATE IS NULL";

Map<String, Object> parameters = new HashMap<String, Object>();
parameters.put("id", employeeInTreatment.getId());

new NamedParameterJdbcTemplate(this.dataSource).update(expDelete,parameters);
new NamedParameterJdbcTemplate(this.dataSource).update(dipDelete,parameters);

it kinda worked (compiling but the deletions were not commited). But i was convinced i could do it in one go.

I created a service and a dao pointing to my mybatis mapper :

employeeBatchDao.deleteEmployeeImportedData(employeeId);

<delete id="deleteEmployeeImportedData" parameterType="Integer">
   {call
       declare
       begin
           DELETE FROM TABLE1 WHERE ID = :id AND CREATION_DATE IS NULL;
           DELETE FROM TABLE2 WHERE ID = :id AND CREATION_DATE IS NULL;
       end
    }

i called it in my tasklet and it worked ! now i can make all my deletes in one go !