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Posted to dev@openjpa.apache.org by "Rick Curtis (JIRA)" <ji...@apache.org> on 2012/09/27 21:49:07 UTC
[jira] [Assigned] (OPENJPA-2267) native query select with null
result causes NullPointerException
[ https://issues.apache.org/jira/browse/OPENJPA-2267?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Rick Curtis reassigned OPENJPA-2267:
------------------------------------
Assignee: Rick Curtis
> native query select with null result causes NullPointerException
> ----------------------------------------------------------------
>
> Key: OPENJPA-2267
> URL: https://issues.apache.org/jira/browse/OPENJPA-2267
> Project: OpenJPA
> Issue Type: Bug
> Components: query
> Affects Versions: 2.2.0
> Environment: my system is fedora 16, MySql 5.5.18 (running innodb), jdk1.6.0_26, openjdk 2.2.0 (also happened in 2.1.0), mysql-connector-java 5.1.18, commons-dbcp 1.4, spring 3.1.1
> Reporter: Ted Leung
> Assignee: Rick Curtis
> Priority: Minor
>
> if you do a native query with a null resultset where the resulting object is not the model object, it causes a null pointer exception.
> ---------------------------------------------------
> mysql> desc Data;
> +--------------------------+--------------+------+-----+---------+----------------+
> | Field | Type | Null | Key | Default | Extra |
> +--------------------------+--------------+------+-----+---------+----------------+
> | id | bigint(20) | NO | PRI | NULL | auto_increment |
> | data | mediumblob | YES | | NULL | |
> +--------------------------+--------------+------+-----+---------+----------------+
> 12 rows in set (0.01 sec)
> mysql> select count(*) from Data;
> +----------+
> | count(*) |
> +----------+
> | 0 |
> +----------+
> 1 row in set (0.00 sec)
> mysql> select max(id) from Data;
> +---------+
> | max(id) |
> +---------+
> | NULL |
> +---------+
> 1 row in set (0.00 sec)
> now in java do :
> Query query = entityManager.createNativeQuery("select max(id) from Data", Long.class);
> List results = query.getResultList();
> The following exception ensues.
> ---------------------------------------------------
> <openjpa-2.2.0-r422266:1244990 nonfatal user error> org.apache.openjpa.persistence.ArgumentException: Failed to execute query "select max(id) from Data". Check the query syntax for correctness. See nested exception for details.
> at org.apache.openjpa.kernel.QueryImpl.execute(QueryImpl.java:872)
> at org.apache.openjpa.kernel.QueryImpl.execute(QueryImpl.java:794)
> at org.apache.openjpa.kernel.DelegatingQuery.execute(DelegatingQuery.java:542)
> at org.apache.openjpa.persistence.QueryImpl.execute(QueryImpl.java:286)
> at org.apache.openjpa.persistence.QueryImpl.getResultList(QueryImpl.java:302)
> ...
> Caused by: java.lang.NullPointerException
> at org.apache.openjpa.kernel.ResultPacker.pack(ResultPacker.java:202)
> at org.apache.openjpa.jdbc.kernel.SQLProjectionResultObjectProvider.getResultObject(SQLProjectionResultObjectProvider.java:88)
> at org.apache.openjpa.lib.rop.RangeResultObjectProvider.getResultObject(RangeResultObjectProvider.java:80)
> at org.apache.openjpa.lib.rop.EagerResultList.<init>(EagerResultList.java:36)
> at org.apache.openjpa.kernel.QueryImpl.toResult(QueryImpl.java:1251)
> at org.apache.openjpa.kernel.QueryImpl.execute(QueryImpl.java:1007)
> at org.apache.openjpa.kernel.QueryImpl.execute(QueryImpl.java:863)
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