我需要从Db2表中获取所有数据并复制到mongoDB。我使用没有元数据表的Spring批处理。我正在使用JpaPagingItemReader从Db2获取数据。我能够从Db2获取基于PageSize属性的第一次获取的数据并成功保存在mongoDB中但是对于下一组数据，在使用分页获取数据时出错。
下面给出了错误：
15:17:36,085 INFO [stdout] (default task-2) 2017-12-06 15:17:36.084 INFO 7088 --- [ default task-2] c.t.controller.ItemController : About to copy All Item
15:17:36,135 INFO [stdout] (default task-2) 2017-12-06 15:17:36.135 INFO 7088 --- [ default task-2] o.s.b.c.l.support.SimpleJobLauncher : Job: [SimpleJob: [name=readDB2]] launched with the following parameters: [{}]
15:17:36,180 INFO [stdout] (default task-2) 2017-12-06 15:17:36.180 INFO 7088 --- [ default task-2] o.s.batch.core.job.SimpleStepHandler : Executing step: [step1]
15:17:36,215 INFO [stdout] (default task-2) Hibernate: select itm0_.itm_nbr as t1_4_, itm0_.itm_des_txt as itm_des13_4_ from itm itm0_ fetch first 10 rows only
15:17:36,884 INFO [stdout] (default task-2) 2017-12-06 15:17:36.884 DEBUG 7088 --- [ default task-2] o.s.data.mongodb.core.MongoTemplate : Saving DBObject containing fields: [_class, itmDesTxt, itemId]
15:17:38,621 INFO [stdout] (default task-2) 2017-12-06 15:17:38.621 INFO 7088 --- [ default task-2] org.mongodb.driver.connection : Opened connection [connectionId{localValue:3, serverValue:1998}] to lxmdbpmdmdev001:27017
15:17:38,894 INFO [stdout] (default task-2) 2017-12-06 15:17:38.894 DEBUG 7088 --- [ default task-2] o.s.data.mongodb.core.MongoTemplate : Saving DBObject containing fields: [_class, itmDesTxt, itemId]
15:17:39,139 INFO [stdout] (default task-2) 2017-12-06 15:17:39.139 DEBUG 7088 --- [ default task-2] o.s.data.mongodb.core.MongoTemplate : Saving DBObject containing fields: [_class, itmDesTxt, itemId]
15:17:39,386 INFO [stdout] (default task-2) 2017-12-06 15:17:39.386 DEBUG 7088 --- [ default task-2] o.s.data.mongodb.core.MongoTemplate : Saving DBObject containing fields: [_class, itmDesTxt, itemId]
15:17:39,632 INFO [stdout] (default task-2) 2017-12-06 15:17:39.632 DEBUG 7088 --- [ default task-2] o.s.data.mongodb.core.MongoTemplate : Saving DBObject containing fields: [_class, itmDesTxt, itemId]
15:17:39,881 INFO [stdout] (default task-2) 2017-12-06 15:17:39.881 DEBUG 7088 --- [ default task-2] o.s.data.mongodb.core.MongoTemplate : Saving DBObject containing fields: [_class, itmDesTxt, itemId]
15:17:40,123 INFO [stdout] (default task-2) 2017-12-06 15:17:40.123 DEBUG 7088 --- [ default task-2] o.s.data.mongodb.core.MongoTemplate : Saving DBObject containing fields: [_class, itmDesTxt, itemId]
15:17:40,377 INFO [stdout] (default task-2) 2017-12-06 15:17:40.377 DEBUG 7088 --- [ default task-2] o.s.data.mongodb.core.MongoTemplate : Saving DBObject containing fields: [_class, itmDesTxt, itemId]
15:17:40,619 INFO [stdout] (default task-2) 2017-12-06 15:17:40.619 DEBUG 7088 --- [ default task-2] o.s.data.mongodb.core.MongoTemplate : Saving DBObject containing fields: [_class, itmDesTxt, itemId]
15:17:40,865 INFO [stdout] (default task-2) 2017-12-06 15:17:40.865 DEBUG 7088 --- [ default task-2] o.s.data.mongodb.core.MongoTemplate : Saving DBObject containing fields: [_class, itmDesTxt, itemId]
15:17:41,109 INFO [stdout] (default task-2) Hibernate: select * from ( select inner2_.*, rownumber() over(order by order of inner2_) as rownumber_ from ( select itm0_.itm_nbr as t1_4_, itm0_.itm_des_txt as itm_des13_4_ from itm itm0_ fetch first 20 rows only ) as inner2_ ) as inner1_ where rownumber_ > 10 order by rownumber_
15:17:41,346 WARN [org.hibernate.engine.jdbc.spi.SqlExceptionHelper] (default task-2) SQL Error: -199, SQLState: 42601
15:17:41,347 ERROR [org.hibernate.engine.jdbc.spi.SqlExceptionHelper] (default task-2) DB2 SQL Error: SQLCODE=-199, SQLSTATE=42601, SQLERRMC=OF;;??( [ DESC ASC NULLS RANGE CONCAT || / MICROSECONDS MICROSECOND, DRIVER=4.18.60
15:17:41,347 WARN [org.hibernate.engine.jdbc.spi.SqlExceptionHelper] (default task-2) SQL Error: -516, SQLState: 26501
15:17:41,347 ERROR [org.hibernate.engine.jdbc.spi.SqlExceptionHelper] (default task-2) DB2 SQL Error: SQLCODE=-516, SQLSTATE=26501, SQLERRMC=null, DRIVER=4.18.60
15:17:41,347 WARN [org.hibernate.engine.jdbc.spi.SqlExceptionHelper] (default task-2) SQL Error: -514, SQLState: 26501
15:17:41,347 ERROR [org.hibernate.engine.jdbc.spi.SqlExceptionHelper] (default task-2) DB2 SQL Error: SQLCODE=-514, SQLSTATE=26501, SQLERRMC=SQL_CURLN200C1, DRIVER=4.18.60
15:17:41,362 INFO [stdout] (default task-2) 2017-12-06 15:17:41.362 ERROR 7088 --- [ default task-2] o.s.batch.core.step.AbstractStep : Encountered an error executing step step1 in job readDB2
15:17:41,362 INFO [stdout] (default task-2)
15:17:41,362 INFO [stdout] (default task-2) javax.persistence.PersistenceException: org.hibernate.exception.SQLGrammarException: could not extract ResultSet
15:17:41,362 INFO [stdout] (default task-2) at org.hibernate.jpa.spi.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1692) ~[hibernate-entitymanager-5.0.12.Final.jar:5.0.12.Final]
15:17:41,362 INFO [stdout] (default task-2) at org.hibernate.jpa.spi.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1602) ~[hibernate-entitymanager-5.0.12.Final.jar:5.0.12.Final]
15:17:41,362 INFO [stdout] (default task-2) at org.hibernate.jpa.internal.QueryImpl.getResultList(QueryImpl.java:492) ~[hibernate-entitymanager-5.0.12.Final.jar:5.0.12.Final]
15:17:41,362 INFO [stdout] (default task-2) at org.springframework.batch.item.database.JpaPagingItemReader.doReadPage(JpaPagingItemReader.java:225) ~[spring-batch-infrastructure-3.0.8.RELEASE.jar:3.0.8.RELEASE]
15:17:41,362 INFO [stdout] (default task-2) at org.springframework.batch.item.database.AbstractPagingItemReader.doRead(AbstractPagingItemReader.java:108) ~[spring-batch-infrastructure-3.0.8.RELEASE.jar:3.0.8.RELEASE]
15:17:41,362 INFO [stdout] (default task-2) at org.springframework.batch.item.support.AbstractItemCountingItemStreamItemReader.read(AbstractItemCountingItemStreamItemReader.java:88) ~[spring-batch-infrastructure-3.0.8.RELEASE.jar:3.0.8.RELEASE]
15:17:41,362 INFO [stdout] (default task-2) at org.springframework.batch.core.step.item.SimpleChunkProvider.doRead(SimpleChunkProvider.java:91) ~[spring-batch-core-3.0.8.RELEASE.jar:3.0.8.RELEASE]
15:17:41,362 INFO [stdout] (default task-2) at org.springframework.batch.core.step.item.SimpleChunkProvider.read(SimpleChunkProvider.java:157) ~[spring-batch-core-3.0.8.RELEASE.jar:3.0.8.RELEASE]
15:17:41,363 INFO [stdout] (default task-2) at org.springframework.batch.core.step.item.SimpleChunkProvider$1.doInIteration(SimpleChunkProvider.java:116) ~[spring-batch-core-3.0.8.RELEASE.jar:3.0.8.RELEASE]
15:17:41,363 INFO [stdout] (default task-2) at org.springframework.batch.repeat.support.RepeatTemplate.getNextResult(RepeatTemplate.java:374) ~[spring-batch-infrastructure-3.0.8.RELEASE.jar:3.0.8.RELEASE]
15:17:41,363 INFO [stdout] (default task-2) at org.springframework.batch.repeat.support.RepeatTemplate.executeInternal(RepeatTemplate.java:215) ~[spring-batch-infrastructure-3.0.8.RELEASE.jar:3.0.8.RELEASE]
15:17:41,363 INFO [stdout] (default task-2) at org.springframework.batch.repeat.support.RepeatTemplate.iterate(RepeatTemplate.java:144) ~[spring-batch-infrastructure-3.0.8.RELEASE.jar:3.0.8.RELEASE]
15:17:41,363 INFO [stdout] (default task-2) at org.springframework.batch.core.step.item.SimpleChunkProvider.provide(SimpleChunkProvider.java:110) ~[spring-batch-core-3.0.8.RELEASE.jar:3.0.8.RELEASE]
15:17:41,363 INFO [stdout] (default task-2) at org.springframework.batch.core.step.item.ChunkOrientedTasklet.execute(ChunkOrientedTasklet.java:69) ~[spring-batch-core-3.0.8.RELEASE.jar:3.0.8.RELEASE]
15:17:41,363 INFO [stdout] (default task-2) at org.springframework.batch.core.step.tasklet.TaskletStep$ChunkTransactionCallback.doInTransaction(TaskletStep.java:406) ~[spring-batch-core-3.0.8.RELEASE.jar:3.0.8.RELEASE]
15:17:41,363 INFO [stdout] (default task-2) at org.springframework.batch.core.step.tasklet.TaskletStep$ChunkTransactionCallback.doInTransaction(TaskletStep.java:330) ~[spring-batch-core-3.0.8.RELEASE.jar:3.0.8.RELEASE]
15:17:41,363 INFO [stdout] (default task-2) at org.springframework.transaction.support.TransactionTemplate.execute(TransactionTemplate.java:133) ~[spring-tx-4.3.12.RELEASE.jar:4.3.12.RELEASE]
15:17:41,363 INFO [stdout] (default task-2) at org.springframework.batch.core.step.tasklet.TaskletStep$2.doInChunkContext(TaskletStep.java:272) ~[spring-batch-core-3.0.8.RELEASE.jar:3.0.8.RELEASE]
15:17:41,363 INFO [stdout] (default task-2) at org.springframework.batch.core.scope.context.StepContextRepeatCallback.doInIteration(StepContextRepeatCallback.java:81) ~[spring-batch-core-3.0.8.RELEASE.jar:3.0.8.RELEASE]
15:17:41,376 INFO [stdout] (default task-2) at org.springframework.batch.repeat.support.RepeatTemplate.getNextResult(RepeatTemplate.java:374) ~[spring-batch-infrastructure-3.0.8.RELEASE.jar:3.0.8.RELEASE]
15:17:41,376 INFO [stdout] (default task-2) at org.springframework.batch.repeat.support.RepeatTemplate.executeInternal(RepeatTemplate.java:215) ~[spring-batch-infrastructure-3.0.8.RELEASE.jar:3.0.8.RELEASE]
15:17:41,376 INFO [stdout] (default task-2) at org.springframework.batch.repeat.support.RepeatTemplate.iterate(RepeatTemplate.java:144) ~[spring-batch-infrastructure-3.0.8.RELEASE.jar:3.0.8.RELEASE]
15:17:41,376 INFO [stdout] (default task-2) at org.springframework.batch.core.step.tasklet.TaskletStep.doExecute(TaskletStep.java:257) ~[spring-batch-core-3.0.8.RELEASE.jar:3.0.8.RELEASE]
15:17:41,376 INFO [stdout] (default task-2) at org.springframework.batch.core.step.AbstractStep.execute(AbstractStep.java:200) ~[spring-batch-core-3.0.8.RELEASE.jar:3.0.8.RELEASE]
15:17:41,376 INFO [stdout] (default task-2) at org.springframework.batch.core.job.SimpleStepHandler.handleStep(SimpleStepHandler.java:148) [spring-batch-core-3.0.8.RELEASE.jar:3.0.8.RELEASE]
15:17:41,376 INFO [stdout] (default task-2) at org.springframework.batch.core.job.AbstractJob.handleStep(AbstractJob.java:392) [spring-batch-core-3.0.8.RELEASE.jar:3.0.8.RELEASE]
15:17:41,376 INFO [stdout] (default task-2) at org.springframework.batch.core.job.SimpleJob.doExecute(SimpleJob.java:135) [spring-batch-core-3.0.8.RELEASE.jar:3.0.8.RELEASE]
15:17:41,376 INFO [stdout] (default task-2) at org.springframework.batch.core.job.AbstractJob.execute(AbstractJob.java:306) [spring-batch-core-3.0.8.RELEASE.jar:3.0.8.RELEASE]
15:17:41,376 INFO [stdout] (default task-2) at org.springframework.batch.core.launch.support.SimpleJobLauncher$1.run(SimpleJobLauncher.java:135) [spring-batch-core-3.0.8.RELEASE.jar:3.0.8.RELEASE]
15:17:41,376 INFO [stdout] (default task-2) at org.springframework.core.task.SyncTaskExecutor.execute(SyncTaskExecutor.java:50) [spring-core-4.3.12.RELEASE.jar:4.3.12.RELEASE]
15:17:41,376 INFO [stdout] (default task-2) at org.springframework.batch.core.launch.support.SimpleJobLauncher.run(SimpleJobLauncher.java:128) [spring-batch-core-3.0.8.RELEASE.jar:3.0.8.RELEASE]
15:17:41,376 INFO [stdout] (default task-2) at com.test.service.impl.ItemServiceImpl.itemCopy(ItemServiceImpl.java:266) [classes:na]
15:17:41,376 INFO [stdout] (default task-2) at com.test.controller.ItemController.allItemCopy(ItemController.java:48) [classes:na]
....
15:17:41,410 INFO [stdout] (default task-2) 2017-12-06 15:17:41.410 INFO 7088 --- [ default task-2] o.s.b.c.l.support.SimpleJobLauncher : Job: [SimpleJob: [name=readDB2]] completed with the following parameters: [{}] and the following status: [FAILED]
批量配置：
@Configuration
@EnableBatchProcessing
public class ItemBatch {
@Autowired
private JobBuilderFactory jobBuilderFactory;
@Autowired
private StepBuilderFactory stepBuilderFactory;
@Autowired
EntityManagerFactory entityManagerFactory;
@Autowired
MongoTemplate mongoTemplate;
@Bean
public Job readDB2() {
return jobBuilderFactory.get("readDB2").start(step1()).build();
}
@Bean
public Step step1() {
return stepBuilderFactory.get("step1")
.<Itm, com.test.model.mongodb.Itm> chunk(5)
.reader(reader())
.writer(writer())
.build();
}
@Bean
public ItemStreamReader<Itm> reader() {
JpaPagingItemReader<Itm> databaseReader = new JpaPagingItemReader<>();
try {
databaseReader.setEntityManagerFactory(entityManagerFactory);
JpaQueryProviderImpl<Itm> jpaQueryProvider = new JpaQueryProviderImpl<>();
jpaQueryProvider.setQuery("Itm.findAll");
databaseReader.setQueryProvider(jpaQueryProvider);
databaseReader.setPageSize(10);
databaseReader.afterPropertiesSet();
} catch (Exception e) {
System.err.println("Error :" + e);
}
return databaseReader;
}
@Bean
public MongoItemWriter<com.test.model.mongodb.Itm> writer() {
MongoItemWriter<com.test.model.mongodb.Itm> writer = new MongoItemWriter<>();
try {
writer.setTemplate(mongoTemplate);
} catch (Exception e) {
e.printStackTrace();
}
writer.setCollection("itm");
return writer;
}
}
内存配置而不是元数据：
@Configuration
public class SpringBatchTestConfiguration {
@Bean
public ResourcelessTransactionManager transactionManager() {
return new ResourcelessTransactionManager();
}
@Bean
public MapJobRepositoryFactoryBean mapJobRepositoryFactory(ResourcelessTransactionManager txManager)
throws Exception {
MapJobRepositoryFactoryBean factory = new MapJobRepositoryFactoryBean(txManager);
factory.afterPropertiesSet();
return factory;
}
@Bean
public JobRepository jobRepository(MapJobRepositoryFactoryBean factory) throws Exception {
return factory.getObject();
}
@Bean
public JobExplorer jobExplorer(MapJobRepositoryFactoryBean factory) {
return new SimpleJobExplorer(factory.getJobInstanceDao(), factory.getJobExecutionDao(),
factory.getStepExecutionDao(), factory.getExecutionContextDao());
}
@Bean
public SimpleJobLauncher jobLauncher(JobRepository jobRepository) {
SimpleJobLauncher launcher = new SimpleJobLauncher();
launcher.setJobRepository(jobRepository);
return launcher;
}
}
QueryProvider：
public class JpaQueryProviderImpl<E> extends AbstractJpaQueryProvider {
private Class<E> entityClass;
private String query;
@Override
public Query createQuery() {
return getEntityManager().createNamedQuery(query, entityClass);
}
public void setQuery(String query) {
this.query = query;
}
public void setEntityClass(Class<E> entityClazz) {
this.entityClass = entityClazz;
}
@Override
public void afterPropertiesSet() throws Exception {
Assert.isTrue(StringUtils.hasText(query), "Query cannot be empty");
Assert.notNull(entityClass, "Entity class cannot be NULL");
}
}
实体：
@Entity
@Table(name="ITM")
@NamedQueries({ @NamedQuery(name = "Itm.findAll", query = "select i from Itm i") })
public class Itm implements Serializable {
private static final long serialVersionUID = 1L;
@Id
@Column(name="ITEM_NBR")
private int itemId;
@Column(name="ITM_DES_TXT")
private String itmDesTxt;
//getter and setter
}
根本原因是这个错误：
DB2 SQL错误：SQLCODE = -199，SQLSTATE = 42601，SQLERRMC = OF ;; ??（[DESC ASC NULLS RANGE CONCAT || / MICROSECONDS MICROSECOND，DRIVER = 4.18.60
这使您指向OF关键字是意外的。
OLAP规范中的ORDER BY ORDER OF在zb / OS v11的Db2中无效，如can be seen in the manual。你需要通过一些明确的表达式来重写你的语句 - 或者完全跳过ORDER BY，因为你还没有订购inner2_子选择。
它不是Spring批处理的问题，它是Spring Zagination与DB2 Z / OS的问题。要解决这个问题，我们必须使用新方言。我仍然面临新方言的问题。需要找到合适的方言配置。