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问题描述
我试图使用HQL（Hibernate查询语言）在两个表之间创建一个联合。这个SQL脚本在我的SQL服务器上工作正常：
SELECT COUNT（DISTINCT linkedin_id）as test，school_name FROM （SELECT * FROM alum_education UNION SELECT * FROM alum_connection_educations）AS UNIONS where school_name ='some string'问题是，当我尝试在grails中运行它时：
def countOfEdu = AlumEducation.executeQuery（select count（distinct linkedinId）as countOfEdu，schoolName as SchoolName from（SELECT * FROM alumEducation UNION SELECT * FROM alumConnectionEducations）AS UNIONS where schoolName ='some string'） 我得到这个错误： org.hibernate.hql.ast.QuerySyntaxException：意外的标记：（在第1行第83列[select count（distinct linkedinId）as countOfEdu，schoolName as SchoolName from（SELECT * FROM alumEducation UNION SELECT * FROM alumConnectionEducations）AS UNIONS where schoo lName ='Duquesne University']如何在grails中运行上述SQL语句？
感谢 jason
解决方案HQL不支持联合。 Hibernate的JIRA中存在一个问题，该问题自2005年开放。
I'm trying to create a Union between two tables, using HQL (Hibernate Query Language). This SQL script works fine on my SQL server:
SELECT COUNT(DISTINCT linkedin_id) as test, school_name FROM (SELECT * FROM alum_education UNION SELECT * FROM alum_connection_educations) AS UNIONS where school_name='some string'the problem is, when i try to run it in grails like this:
def countOfEdu = AlumEducation.executeQuery("select count (distinct linkedinId ) as countOfEdu, schoolName as SchoolName from (SELECT * FROM alumEducation UNION SELECT * FROM alumConnectionEducations) AS UNIONS where schoolName='some string'" )i get this error:
org.hibernate.hql.ast.QuerySyntaxException: unexpected token: ( near line 1, column 83 [select count(distinct linkedinId ) as countOfEdu, schoolName as SchoolName from (SELECT * FROM alumEducation UNION SELECT * FROM alumConnectionEducations) AS UNIONS where schoolName='Duquesne University']How can I run the above SQL statement in grails?
thanks jason
解决方案Unions are not supported by HQL. There is an issue in Hibernate's JIRA that is open since 2005.
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如何在HQL中执行联合SQL语句？
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