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From "Brian Topping (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (OPENJPA-2268) SQL Generation with query using IN element
Date Wed, 26 Sep 2012 21:19:07 GMT

    [ https://issues.apache.org/jira/browse/OPENJPA-2268?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13464173#comment-13464173
] 

Brian Topping commented on OPENJPA-2268:
----------------------------------------

I updated the issue itself with more information about the domain classes involved and mentioned
a debugging session but didn't have the exact generated query at hand or it's location.  It
is at org.apache.openjpa.kernel.ExpressionStoreQuery.DataStoreExecutor#executeQuery (line
783 in the 2.2.0 source) and the StoreQuery._ctx_query is the same as the JPQL string ("select
s from PersistentUser s where s.username = :name"), not what I have above.  Assuming this
is correct, where does the actual SQL that would be sent to the database become available?
                
> SQL Generation with query using IN element
> ------------------------------------------
>
>                 Key: OPENJPA-2268
>                 URL: https://issues.apache.org/jira/browse/OPENJPA-2268
>             Project: OpenJPA
>          Issue Type: Bug
>          Components: jdbc, kernel, sql
>    Affects Versions: 2.2.0
>            Reporter: Brian Topping
>
> Hi all, I've been staring at a problem for the last 12 hours with a JPQL query that appears
to be parsing incorrectly.  There are three tables, a permissions table with a n-n relation
to a role table, in turn with an n-n relation to a users table.  These n-n relations are created
with default options of the @ManyToMany annotation and I have added them below for completeness.The
intent of the query is to get all permissions for a user by username: {{select p from Permission
p, IN(p.roles) r, IN(r.users) u where u.username = :name}}.  
> No errors are generated, but the SQL emitted to the log has not been parsed or transformed
at all.  (This may be correct, I've been fortunate enough so far not to have to look at the
SQL generated by OpenJPA).  
> Debugging into OpenJPA, it appears that the generated query is "select permission p where
username='?'", which obviously will not return anything.  
> I'm still debugging this (having gotten down to the level of the jflex code), but it's
my first time going deep on OpenJPA like this so things are going slow.  I'll post updates
here, but if anyone sees this and has ideas of where to look first (no matter how small),
it may be a great help.
> Thank you1
> {code name=Permission.java}
> @Entity
> public class Permission {
> ...
>     @ManyToMany(mappedBy="permissions",targetEntity=Role.class)
>     private Set<Role> roles;
> }
> {code}
> {code name=Role.java}
> @Entity
> public class Role {
> ...
>     @ManyToMany(mappedBy="users",targetEntity=User.class)
>     private Set<User> users;
> }
> {code}
> {code name=User.java}
> @Entity
> public class User {
> ...
>     @Column
>     private String username;
> }
> {code}

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