PostgreSQL 过程:
CREATE OR REPLACE PROCEDURE public.create_task_by_device(task_id integer, device_ids text)
LANGUAGE plpgsql
AS $procedure$
begin
-- do something here
END;
$procedure$
;
Spring JPA:(Kotlin)
interface TaskTemplateRepository : JpaRepository<TaskTemplate, Int> {
@Procedure("public.create_task_by_device")
fun createTaskByDevice(@Param("task_id") taskId: Int, @Param("device_ids") device_ids: String)
}
例外:
org.postgresql.util.PSQLException: ERROR: public.create_task_by_device(integer, character varying) is a procedure. To call a procedure, use CALL.
at org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorImpl.java:2553) ~[postgresql-42.2.20.jar:42.2.20]
然后我就通过
{call public.create_task_by_device(?,?)}
执行了SQL语句
spring.jpa.show-sql: true
看来实际执行的语句是
call
使用call。
我不明白为什么整个句子都被
{ ... }
包围
然后尝试单步调试,
org.postgresql.jdbc.PgStatement#execute
方法中实际执行的SQL语句是select * from create_task_by_device(1,'2') as result
,不像JPA在命令行输出的SQL语句,不知道为什么
最后我尝试写自己的SQL语句
@Query("call public.create_task_by_device(?1, ?2)", nativeQuery = true)
fun createTaskByDevice(@Param("task_id") taskId: Int, @Param("device_ids") device_ids: String)
我又遇到了一个异常
org.postgresql.util.PSQLException: No results were returned by the query.
如果我在方法中添加
@Modifying
,则会抛出 javax.persistence.TransactionRequiredException: Executing an update/delete query
尝试将 : 作为占位符更改为 @Query -> (:task_id,:device_ids);
@Query(value = "{call public.create_task_by_device(:task_id,:device_ids)}",nativeQuery = true)
如果 SP 执行 DML 操作(如(Insert,Update)),请添加以下注释和 @Query;
@Transactional
@Modifying(clearAutomatically = true)
这是参考 -> https://www.baeldung.com/spring-data-jpa-stored-procedures#query-annotation
添加此注释将不会出现问题 @Transactional(propagation = Propagation.NOT_SUPPORTED)。它解决了我的问题,谢谢大家:-)