HQL在executeUpdate上生成不完整的「交叉連接」

Question

我正在開發Grails項目。我有以下查詢，我正在嘗試執行

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之間的關係是單向多對一的。所以，LocationTrade有一個Trade的參考，但Trade類沒有參考LocationTrade列表。

執行時，我得到以下異常。

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 

看來生成的查詢是錯誤的。應該有一個加入貿易表，但缺少。我無法確定我在這裏所犯的錯誤。你能幫助我嗎？

創建腳本兩個表（我已經剝離了一些無趣列）

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; 

感謝

Answer 1

的Hibernate documentation說：

沒有加入，無論是隱性或顯性的，可以在批量HQL查詢中指定。子查詢可以用在where子句中，其中子查詢本身可以包含連接。

lt.trade.volume是LocationTrade和Trade之間的隱式內部聯接，因此查詢無效。您必須將其重寫爲以下內容：

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) 

或者您必須改用SQL查詢。