Question

我一直在尝试使用update stmt更新时间戳字段。我尝试了java.sql.timestamp，java.util.date，Calendar，LocalDateTime，ZonedDateTime和一堆其他java date util包。他们似乎都没有工作。

列：commit_ts（Postgresql中没有Timezone的TimeStamp）在我们的JPA / Hibernate中定义为

@Column(name = "COMMIT_TS")
@Temporal(TemporalType.TIMESTAMP)
private Timestamp commitTs;

这是查询

@Timed(name = "updateWorkAllocationStatus")
@Transactional
@Modifying(clearAutomatically = true)
@Query(
      nativeQuery = true,
      value = "UPDATE wlm_work_allocation SET commit_ts=:ts " + 
              "WHERE allocation_id = :allocationId " + 
              "and status = :status " + 
              "and commit_ts == null"
)
int updateWorkAllocationStatus(
    @Param("timestamp") Timestamp ts,
    @Param("allocationId")Long allocationId,
    @Param("status")String status
);

我也尝试过NativeQueries

@NamedNativeQuery(name = "WorkAllocationEntity.updateCommitTs",
        query="UPDATE wlm_work_allocation SET commit_ts= TIMESTAMP WHERE allocation_id=:allocationId and status=:status and commit_ts==null")

注意：根据此链接，SQL标准要求只写时间戳等同于没有时区的时间戳，PostgreSQL会尊重这种行为。 https://www.postgresql.org/docs/9.1/static/datatype-datetime.html

Springboot版本：1.5.7.RELEASE

Postgres JDBC驱动程序：9.0-801.jdbc4

PostgresSQL DB：9.6.5

Error: 
org.postgresql.util.PSQLException: ERROR: operator does not 
exist: timestamp without time zone == unknown
Hint: No operator matches the given name and argument type(s). 
You might need to add explicit type casts.

有人可以帮忙吗？

Answer 1

JPQL和SQL中的比较运算符是= not ==

commit_ts==null

应该是

commit_ts is null

Spring JPA Hibernate在postgres中提供错误更新时间戳时区

1 个答案: