帶有實體構造函數的 JPQL 查詢

Question

我在構建一個查詢時遇到了問題，該查詢按“活動”列對“Smoke”實體進行分組並對它們的“數量”求和。 詢問：

@Query(value = "SELECT new com.eminyilmazz.smoketracker.dto.ActivityBasedQuantity(s.activity, SUM(s.quantity)) FROM smoke s WHERE s.smoked_date BETWEEN :beginDate AND :endDate GROUP BY s.activity", nativeQuery = true)
List<ActivityBasedQuantity> getTotalQuantityGroupedByActivityWithMinuteInterval(@Param("beginDate")LocalDateTime beginDate, @Param("endDate") LocalDateTime endDate);

數據傳輸協議：

public class ActivityBasedQuantity {
    private String activity;
    private Long quantity;

    public ActivityBasedQuantity(String activity, Long quantity) {
        this.activity = activity;
        this.quantity = quantity;
    }

錯誤中的第一行：

org.springframework.dao.InvalidDataAccessResourceUsageException: JDBC exception executing SQL [SELECT new com.eminyilmazz.smoketracker.dto.ActivityBasedQuantity(s.activity, SUM(s.quantity)) FROM smoke s WHERE s.smoked_date BETWEEN ? AND ? GROUP BY s.activity]; SQL [n/a]

我已經嘗試刪除此 stackoverflow 問題中建議的“nativeQuery = true”，但它會拋出一個錯誤，指出 spring bean factory 和 hibernate 無法解析“smoke”表及其屬性。

Answer 1

修復了這些更改的問題；

將“煙”替換為“煙”（打字錯誤）

刪除了“nativeQuery = true”

@Query("SELECT new com.eminyilmazz.smoketracker.dto.ActivityBasedQuantity(s.activity, SUM(s.quantity)) FROM Smoke s WHERE s.smokedDate BETWEEN :beginDate AND :endDate GROUP BY s.activity")
    List<ActivityBasedQuantity> getTotalQuantityGroupedByActivityWithMinuteInterval(@Param("beginDate")LocalDateTime beginDate, @Param("endDate") LocalDateTime endDate);