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POHQL : Multiple inner joins in HQL queries
 

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  1. POHQL : Multiple inner joins in HQL queries
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    <p>I have many entities in my project , and i want to retrieve the data from multiple entities by using HQL query. In HQL query i try to use JOINS to retrieve the data from Entities , but it generate the exception when the code is executed. Following is the exception : </p> <pre><code>org.hibernate.hql.ast.QuerySyntaxException: Path expected for join! [SELECT s.id, s.name, s.url, s.uuid, s.createdBy , t.id , u.id , u.name FROM com.insonix.qrata.models.Site s INNER JOIN s.topics t INNER JOIN User u WHERE lower(s.name) LIKE lower(:name) AND s.createdBy IN (:created_by) AND u.id = s.createdBy] </code></pre> <p>Following is the Query : </p> <pre><code>SELECT s.id, s.name, s.url, s.uuid, s.createdBy , t.id , u.id , u.userinfo.firstname , u.userinfo.lastname FROM Site s INNER JOIN s.topics t INNER JOIN User u WHERE lower(s.name) LIKE lower(:name) AND s.createdBy IN (:created_by) AND u.id = s.createdBy </code></pre> <p>Following is my Entities : </p> <pre><code>public class CommonEntity { ------------------- private Long createdBy; private String uuid; ------------------------ } public class Site extends CommonEntity{ private long id; private String url; private String name; private Category category; private List&lt;Topic&gt; topics = new ArrayList&lt;&gt;(0); --------------------------- } public class Topic extends CommonEntity{ private int id; private List&lt;Site&gt; sites = new ArrayList&lt;Site&gt;(0); ----------------------------------- } public class User extends CommonEntity private long id; private UserInfo userinfo; -------------------------------- } public class UserInfo extends CommonEntity{ private String firstname; private String lastname; } </code></pre>
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