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Date: Wed, 12 Sep 2012 02:17:07 +1100 (NCT)
From: "Albert Lee (JIRA)" <jira@apache.org>
To: dev@openjpa.apache.org
Message-ID: <932314745.63767.1347376627745.JavaMail.jiratomcat@arcas>
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Subject: [jira] [Updated] (OPENJPA-2255) Couldn't load the referencedColumn
 definition when create the JoinTable
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     [ https://issues.apache.org/jira/browse/OPENJPA-2255?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Albert Lee updated OPENJPA-2255:
--------------------------------

    Fix Version/s: 2.3.0
    
> Couldn't load the referencedColumn definition when create the JoinTable
> -----------------------------------------------------------------------
>
>                 Key: OPENJPA-2255
>                 URL: https://issues.apache.org/jira/browse/OPENJPA-2255
>             Project: OpenJPA
>          Issue Type: Bug
>          Components: jpa
>    Affects Versions: 2.1.1
>            Reporter: xiezhi
>            Assignee: Albert Lee
>            Priority: Minor
>              Labels: documentation, patch
>             Fix For: 2.3.0
>
>         Attachments: OPENJPA-2255.patch
>
>
> The JoinColumn couldn't have the referencedColumn's definition which includes the length definition. and it's length  should be assigned to the default value 255. 
> @Entity 
> public class Student { 
>   @Id @Column(name="id", length=128, nullable=false) private String id; 
>   @Column(name="sName", length=255) private String sName; 
>   @ManyToMany 
>   @JoinTable( 
>     name="student_course_map", 
>     joinColumns={@JoinColumn(name="student_id", referencedColumnName="id", nullable=false)}, 
>     inverseJoinColumns={@JoinColumn(name="course_id", referencedColumnName="id", nullable=false)} 
>   ) 
>   public Collection getCourses() 
>   ... 
> } 
> @Entity 
> public class Courses{ 
>   @Id @Column(name="id", length=128, nullable=false) private String id; 
>   @Column(name="cName", length=255) private String cName; 
>   ... 
> } 
> We can see the student id length has been defined to 128. And there is no definition length in the JoinColumn student_id. The JoinColumn should be set to the default value 255. 
> The warning message will occur like this 
> WARN  [Schema] Existing column "student_id" on table "test.student_course_map" is incompatible with the same column in the given schema definition. Existing column: 
> Full Name: student_course_map.student_id 
> Type: varchar 
> Size: 128 
> Default: null 
> Not Null: true 
> Given column: 
> Full Name: student_course_map.student_id 
> Type: varchar 
> Size: 255 
> Default: null 
> Not Null: true 

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