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From "Oleg Lyalikov (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (OPENJPA-2002) Query cache excess eviction with InheritanceType.TABLE_PER_CLASS
Date Tue, 24 May 2011 13:00:47 GMT

     [ https://issues.apache.org/jira/browse/OPENJPA-2002?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Oleg Lyalikov updated OPENJPA-2002:
-----------------------------------

    Attachment: openjpa_querycache.log

> Query cache excess eviction with InheritanceType.TABLE_PER_CLASS 
> -----------------------------------------------------------------
>
>                 Key: OPENJPA-2002
>                 URL: https://issues.apache.org/jira/browse/OPENJPA-2002
>             Project: OpenJPA
>          Issue Type: Improvement
>          Components: datacache
>    Affects Versions: 2.0.0
>         Environment: WinXP SP3, JDK 1.6.0_21, Postgres
>            Reporter: Oleg Lyalikov
>              Labels: QueryCache
>         Attachments: openjpa_querycache.log, openjpa_querycache.zip
>
>
> Test configuration:
> @Entity
> @Inheritance(strategy = InheritanceType.TABLE_PER_CLASS)
> public abstract class Parent { ... }
> and some inheritors
> @Entity
> public class ChildA extends Base { ... }
> @Entity
> public class ChildB extends Base { ... }
> Parent class has some fields which are used both in ChildA and ChildB classes but these
fields are in separate tables (for ChildA and ChildB class) with no common table.
> Test case:
> 0. Use VM argument -Dopenjpa.Log=SQL=TRACE,Runtime=TRACE
> 1. Create an object of ChildA entity.
> 2. Execute query "SELECT x FROM ChildA x WHERE x.value = 'ValueA'".
> 3. Execute this query one more time to ensure its result is cached.
> 4. Create an object of ChildB entity.
> 5. Execute query "SELECT x FROM ChildA x WHERE x.value = 'ValueA'".
> The query result is not cached, SQL is executed
> This test case can be found in attachement. JUnit test itself runs successfully, so please,
pay attention to openjpa logs. Also attached my junit test log.

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