HQL在executeUpdate上生成不完整的“交叉连接”

Question

我正在开发Grails项目。我有以下查询，我正在尝试执行

String CHECK_FOR_HIGH_TRADE_VOLUME_QUERY = "Update LocationTrade lt set lt.hasVeryHighVolume=true where lt.locationIndices=? AND lt.trade.volume>20000"; 

... 

LocationTrade.executeUpdate(CHECK_FOR_HIGH_TRADE_VOLUME_QUERY, [indices]); 

LocationTrade和Trade之间的关系是单向多对一的。所以，LocationTrade有一个Trade的参考，但Trade类没有参考LocationTrade列表。

执行时，我得到以下异常。

org.springframework.dao.InvalidDataAccessResourceUsageException: could not execute update query; SQL [update location_trade cross join set has_very_high_volume=1 where location_indices_id=? and volume>20000]; nested exception is org.hibernate.exception.SQLGrammarException: could not execute update query 

and 

Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'set has_very_high_volume=1 where location_indices_id=997 and volume>20000' at line 1 

看来生成的查询是错误的。应该有一个加入贸易表，但缺少。我无法确定我在这里所犯的错误。你能帮助我吗？

创建脚本两个表（我已经剥离了一些无趣列）

CREATE TABLE `location_trade` (
    `id` bigint(20) NOT NULL AUTO_INCREMENT, 
    `version` bigint(20) NOT NULL, 
    `auto_status` varchar(255) DEFAULT NULL, 
    `exclusion_reason_description` varchar(255) DEFAULT NULL, 
    `exclusion_reason_id` bigint(20) DEFAULT NULL, 
    `exclusion_reason_title` varchar(255) DEFAULT NULL, 
    `location_indices_id` bigint(20) DEFAULT NULL, 
    `manual_status` varchar(255) DEFAULT NULL, 
    `trade_id` bigint(20) DEFAULT NULL, 
    `absolute_price` decimal(19,6) DEFAULT NULL, 
    `flag` varchar(255) DEFAULT NULL, 
    `auto_exclusion_reason` varchar(255) DEFAULT NULL, 
    `date_created` datetime DEFAULT NULL, 
    `exclusion_reason_text` varchar(255) DEFAULT NULL, 
    `last_updated` datetime DEFAULT NULL, 
    `has_very_high_volume` bit(1) DEFAULT NULL, 
    PRIMARY KEY (`id`), 
    KEY `FK858985A90CAA966` (`location_indices_id`), 
    KEY `FK858985AB5FA6A69` (`trade_id`), 
    CONSTRAINT `FK858985A90CAA966` FOREIGN KEY (`location_indices_id`) REFERENCES `location_indices` (`id`), 
    CONSTRAINT `FK858985AB5FA6A69` FOREIGN KEY (`trade_id`) REFERENCES `trade` (`id`) 
) ENGINE=InnoDB AUTO_INCREMENT=25405 DEFAULT CHARSET=latin1; 




CREATE TABLE `trade` (
    `id` bigint(20) NOT NULL AUTO_INCREMENT, 
    `version` bigint(20) NOT NULL, 
    `comments` varchar(1020) DEFAULT NULL, 
    `end_date` datetime DEFAULT NULL, 
    `price` decimal(19,6) DEFAULT NULL, 
    `price_type` varchar(255) DEFAULT NULL, 
    `source_id` bigint(20) DEFAULT NULL, 
    `start_date` datetime DEFAULT NULL, 
    `trade_date` datetime DEFAULT NULL, 
    `trade_name` varchar(255) DEFAULT NULL, 
    `volume` decimal(19,6) DEFAULT NULL, 
    `volume_units` varchar(255) DEFAULT NULL, 
    `date_created` datetime DEFAULT NULL, 
    `last_updated` datetime DEFAULT NULL, 
    PRIMARY KEY (`id`), 
    KEY `FK697F1642D085935` (`source_id`), 
    CONSTRAINT `FK697F1642D085935` FOREIGN KEY (`source_id`) REFERENCES `job_source` (`id`), 
) ENGINE=InnoDB AUTO_INCREMENT=26567 DEFAULT CHARSET=latin1; 

感谢

Answer 1

的Hibernate documentation说：

没有加入，无论是隐性或显性的，可以在批量HQL查询中指定。子查询可以用在where子句中，其中子查询本身可以包含连接。

lt.trade.volume是LocationTrade和Trade之间的隐式内部联接，因此查询无效。您必须将其重写为以下内容：

update LocationTrade lt set lt.hasVeryHighVolume=true where lt.locationIndices=? 
and lt.id in (
    select lt2.id from LocationTrade lt2 where lt2.trade.volume > 20000) 

或者您必须改用SQL查询。