[
https://issues.apache.org/jira/browse/DERBY-3033?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Haolan Qin updated DERBY-3033:
------------------------------
Attachment: test.rar
1. copy the attached "viewer" folder to your derby folder
2. launch derby on port 9002
3. java -cp .;./derbyclient-10.2.2.0.jar SkipScan
You will see the exception in the console.
The exception will NOT be thrown if you modify the java file to hard-code those
numbers (4 and 100) in the query or if you run the query from a sql console
window. Also, if you add an index on dicom_send_requests.send_date and run the
same program, the exception will not be thrown.
If you turn on execution plan logging, you will see that the exception scenario
has a different execution plan from all other scenarios.
> select query results in nullpointer exception in skipScan()
> -----------------------------------------------------------
>
> Key: DERBY-3033
> URL: https://issues.apache.org/jira/browse/DERBY-3033
> Project: Derby
> Issue Type: Bug
> Components: SQL
> Affects Versions: 10.2.2.0
> Environment: Windows XP, Java 5.0, JDBC, Derby 10.2.2.0
> Reporter: Haolan Qin
> Attachments: test.rar
>
>
> The following error was repeatedly thrown when we tried to run a select query
> via JDBC. Strangely, the exact same select query did not trigger any error
> when run from the command line console. After we added an index, the error
> went away completely.
> java.lang.NullPointerException
> at org.apache.derby.impl.sql.execute.NoPutResultSetImpl.skipScan(Unknown
> Source)
> at org.apache.derby.impl.sql.execute.TableScanResultSet.openCore(Unknown
> Source)
> at
> org.apache.derby.impl.sql.execute.IndexRowToBaseRowResultSet.openCore(Unknown
> Source)
> at
> org.apache.derby.impl.sql.execute.ProjectRestrictResultSet.openCore(Unknown
> Source)
> at org.apache.derby.impl.sql.execute.JoinResultSet.openRight(Unknown Source)
> at org.apache.derby.impl.sql.execute.JoinResultSet.openCore(Unknown Source)
> at
> org.apache.derby.impl.sql.execute.ProjectRestrictResultSet.openCore(Unknown
> Source)
> at org.apache.derby.impl.sql.execute.SortResultSet.openCore(Unknown Source)
> at
> org.apache.derby.impl.sql.execute.ProjectRestrictResultSet.openCore(Unknown
> Source)
> at org.apache.derby.impl.sql.execute.BasicNoPutResultSetImpl.open(Unknown
> Source)
> at org.apache.derby.impl.sql.GenericPreparedStatement.execute(Unknown Source)
> at org.apache.derby.impl.jdbc.EmbedStatement.executeStatement(Unknown Source)
> at
> org.apache.derby.impl.jdbc.EmbedPreparedStatement.executeStatement(Unknown
> Source)
> at org.apache.derby.impl.jdbc.EmbedPreparedStatement.execute(Unknown Source)
> at org.apache.derby.impl.drda.DRDAStatement.execute(Unknown Source)
> at org.apache.derby.impl.drda.DRDAConnThread.processCommands(Unknown Source)
> at org.apache.derby.impl.drda.DRDAConnThread.run(Unknown Source)
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
