spring-data

问题 I have this query that updates some prices higher that 2 days ago, but does not work @Transactional @Modifying @Query("update HotelDailyPrice hdp set hdp.price = (select avg (hp.price) " + "from HotelPrice hp where hp.id = ?1 and hp.updateDate > CURRENT_DATE - 2), hdp.day = ?2 ") void updateDailyAveragePrice (Hotel hotel, String dayDate); 回答1: Actually, JPA doesn't support time periods operations because not all databases support it. So you have following options: Calculate date

问题 I have this query that updates some prices higher that 2 days ago, but does not work @Transactional @Modifying @Query("update HotelDailyPrice hdp set hdp.price = (select avg (hp.price) " + "from HotelPrice hp where hp.id = ?1 and hp.updateDate > CURRENT_DATE - 2), hdp.day = ?2 ") void updateDailyAveragePrice (Hotel hotel, String dayDate); 回答1: Actually, JPA doesn't support time periods operations because not all databases support it. So you have following options: Calculate date

问题 I'm using Spring Data JPA with Hibernate as persistence provider in conjunction with a remote MySQL5 Server for a job that periodically replicates a subset of internal data. The job (i.e. a quartz-scheduled java application) runs once per dai and needs approx. 30seconds to complete the synchronization). For safety reasons we don't want to open the remote server for direct connections from outside (i.e. other than localhost). I've seen examples with Jsch to programmatically set up an ssh

问题 I'm using Spring Data JPA with Hibernate as persistence provider in conjunction with a remote MySQL5 Server for a job that periodically replicates a subset of internal data. The job (i.e. a quartz-scheduled java application) runs once per dai and needs approx. 30seconds to complete the synchronization). For safety reasons we don't want to open the remote server for direct connections from outside (i.e. other than localhost). I've seen examples with Jsch to programmatically set up an ssh

问题 I'm using Spring Data JPA with Hibernate as persistence provider in conjunction with a remote MySQL5 Server for a job that periodically replicates a subset of internal data. The job (i.e. a quartz-scheduled java application) runs once per dai and needs approx. 30seconds to complete the synchronization). For safety reasons we don't want to open the remote server for direct connections from outside (i.e. other than localhost). I've seen examples with Jsch to programmatically set up an ssh

问题 I want to write query (properties or yaml) in external file to load database. - This is long query and does not look good to eye when placed inside @Query("long query") in XXXRepository class. Is there way to write this query in an external file (properties, yaml, xml or json) and call that file in @Query() in spring data jpa? 回答1: You can use named queries, where the queries have to be defined in a file called META-INF/jpa-named-queries.properties . See the spring example: User

问题 I want to write query (properties or yaml) in external file to load database. - This is long query and does not look good to eye when placed inside @Query("long query") in XXXRepository class. Is there way to write this query in an external file (properties, yaml, xml or json) and call that file in @Query() in spring data jpa? 回答1: You can use named queries, where the queries have to be defined in a file called META-INF/jpa-named-queries.properties . See the spring example: User

问题 I have an @Entity which is mapped to a view, here is how it looks import org.hibernate.annotations.Immutable; import javax.persistence.*; @Table(name = "user_earning") @Entity @Immutable public class UserFlightEarning { @Id public Long userId; public Long flightId; @Column(name = "flight_seq") public Long flightSequence; } This works fine, I can retrieve records from the view using the dao. However I noticed in the logs that Hibernate is actually trying to create the table but failing because

问题 I have a spring mvc project with spring data, jpa and hibernate. I have a multilanguage database. I designed my database and entity. I am looking for a best practice to query my tables by language. Do I have to write custom jpa query, or is there a generic way to query my tables. If I have a mistake on db or entity design, please warn me. Database: CREATE TABLE translation ( id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT, PRIMARY KEY (id)); CREATE TABLE translation_text ( translation_id BIGINT

问题 I have a spring mvc project with spring data, jpa and hibernate. I have a multilanguage database. I designed my database and entity. I am looking for a best practice to query my tables by language. Do I have to write custom jpa query, or is there a generic way to query my tables. If I have a mistake on db or entity design, please warn me. Database: CREATE TABLE translation ( id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT, PRIMARY KEY (id)); CREATE TABLE translation_text ( translation_id BIGINT