Question

我在Spring Boot中有一个本地查询，

@Query(value = "SELECT t.* FROM Transaction t WHERE " +
    "t.datetime >= TO_TIMESTAMP(?1,'YYYY-MM-ddTHH:MI') " +
    "AND t.datetime < TO_TIMESTAMP(?2,'YYYY-MM-ddTHH:MI') " +
    "AND (t.location_1 = ?3 or ?3 is null) " +
    "LIMIT ?4",
    nativeQuery = true)
    List<Transaction> findBySearchTerms(@Param("fromDateTime") String fromDateTime,
            String toDateTime,
            Integer location1,
            Integer maxCount
            );

对于location1，它可以为null。当我使用location1 null运行此查询时，它返回错误消息：org.postgresql.util.PSQLException：错误：运算符不存在：bigint = bytea

之后，我尝试对参数3进行强制转换：

"AND (?3 is null or t.location_1 = cast(?3 as bigint)) " +

它还会导致错误：org.postgresql.util.PSQLException：错误：无法将类型bytea转换为bigint。

我已经在stackoverflow上搜索了类似的问题，并遵循了一些建议，但仍然无法正常工作。有什么想法吗？

Answer 1

我遇到了一个同样的问题，我设法通过将其强制转换为BIGINT，但首先是TEXT，然后是BIGINT来解决它。我使用的是Spring Boot 2.2和Kotlin，但是对于Java来说却一样。

我有以下示例：

sizeof(cl_mem)

如果我不进行转换，则会出现错误：

 @Query(
        """
         SELECT
         f.id,
         f.name,
         c.id AS company_id,
         c.name AS company_name
         FROM facility f
         WHERE (:companyId IS NULL OR f.company_id = CAST(CAST(:companyId AS TEXT) AS BIGINT))  
        """
)
@Transactional(readOnly = true)
    fun exampleMethod(@Param("companyId") companyId: Long? = null):List<Result>

我只将它强制转换为BIGINT，然后错误是：

Caused by: org.postgresql.util.PSQLException: ERROR: operator does not exist: bigint = bytea
  Hint: No operator matches the given name and argument type(s). You might need to add explicit type casts

Answer 2

您可能有两个不同的查询来处理Null和Not Null。根据位置为空或不为空调用这两个方法

@Query(value = "SELECT t.* FROM Transaction t WHERE " +
"t.datetime >= TO_TIMESTAMP(?1,'YYYY-MM-ddTHH:MI') " +
"AND t.datetime < TO_TIMESTAMP(?2,'YYYY-MM-ddTHH:MI') " +
"AND (t.location_1 = ?3 ) " +
"LIMIT ?4", nativeQuery = true)

@Query(value = "SELECT t.* FROM Transaction t WHERE " +
"t.datetime >= TO_TIMESTAMP(?1,'YYYY-MM-ddTHH:MI') " +
"AND t.datetime < TO_TIMESTAMP(?2,'YYYY-MM-ddTHH:MI') " +
"AND (t.location_1 is null) " +
"LIMIT ?4",
nativeQuery = true)

Answer 3

只需反向查询中的参数即可。

@Query(value = "SELECT t.* FROM Transaction t WHERE " +
    "t.datetime >= TO_TIMESTAMP(?1,'YYYY-MM-ddTHH:MI') " +
    "AND t.datetime < TO_TIMESTAMP(?2,'YYYY-MM-ddTHH:MI') " +
    "AND ( ?3 is null or t.location_1 = ?3) " +
    "LIMIT ?4",
    nativeQuery = true)
    List<Transaction> findBySearchTerms(@Param("fromDateTime") String fromDateTime,
            String toDateTime,
            Integer location1,
            Integer maxCount
            );

带空参数的Spring Boot本机查询

3 个答案: