JPA+Postgresql+Spring Data Page分页失败

按照示例进行如下代码编写

Repository

 Page<DeviceEntity> findByTenantId(int tenantId, Pageable pageable);

service

    @Override
    public List<DeviceEntity> getDevices(int count, int page, int teantid) {
        Page<DeviceEntity> devices=deviceEntityRepository.findByTenantId(teantid,
                new PageRequest(page,count, Sort.Direction.ASC,"id"));
        return null;
    }

会出现如下错误

2017-04-25 17:12:09.541 ERROR 6136 --- [nio-9090-exec-1] c.alibaba.druid.filter.stat.StatFilter   : merge sql error, dbType postgresql, sql : 
select deviceenti0_.id as id1_0_, deviceenti0_.dev_id as dev_id2_0_, deviceenti0_.dev_manufacture as dev_manu3_0_, deviceenti0_.dev_note as dev_note4_0_, deviceenti0_.dev_position1 as dev_posi5_0_, deviceenti0_.dev_position2 as dev_posi6_0_, deviceenti0_.dev_sn as dev_sn7_0_, deviceenti0_.dev_type as dev_type8_0_, deviceenti0_.emp_id as emp_id9_0_, deviceenti0_.tenant_id as tenant_10_0_, deviceenti0_.user_id as user_id11_0_ from public.device deviceenti0_ where deviceenti0_.tenant_id=? order by deviceenti0_.id asc limit ?, ?

com.alibaba.druid.sql.parser.ParserException: syntax error, error in :' asc limit ?, ?',expect COMMA, actual COMMA limit
	at com.alibaba.druid.sql.parser.SQLParser.printError(SQLParser.java:239) ~[druid-1.0.26.jar:1.0.26]
	at com.alibaba.druid.sql.parser.SQLStatementParser.parseStatementList(SQLStatementParser.java:431) ~[druid-1.0.26.jar:1.0.26]
	...

多方查找，没有类似结果。查看debug中构造的sql语句，构造的sql在navicat for postgresql执行，也会返回如下错误。

原因是pg数据库中的查询语句应该是

SELECT select_list
    FROM table_expression
    [LIMIT { number | ALL }] [OFFSET number]

有JPA构造的查询语句是mysql格式的。

解决方法是，在Repository中，自己写Query，即可

这里注意postgres需要使用本地sql语句

    @Query(value="select * from device where tenant_id=?1 order by id limit ?2 offset ?3 ",nativeQuery = true)
    List<DeviceEntity> findByTenantId(int tenantId, int size, int page);

另需要在druid配置中加入制定数据库类型。我是采用@Config方式配置的，语句如下

@Configuration
@EnableConfigurationProperties({DruidDataSourceProperties.class})
public class DruidConfiguration {
    @Autowired
    private DruidDataSourceProperties properties;

    @Bean
    @ConditionalOnMissingBean
    public DataSource druidDataSource() {

        DruidDataSource druidDataSource = new DruidDataSource();
...........
druidDataSource.setDbType("postgresql");
.....

null