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Posted to derby-dev@db.apache.org by "Dag H. Wanvik (JIRA)" <ji...@apache.org> on 2014/09/04 00:10:51 UTC
[jira] [Commented] (DERBY-6726) NPE from trigger
[ https://issues.apache.org/jira/browse/DERBY-6726?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14120563#comment-14120563 ]
Dag H. Wanvik commented on DERBY-6726:
--------------------------------------
Working from the DDL shown, I have not able to reproduce this on trunk yet.
> NPE from trigger
> ----------------
>
> Key: DERBY-6726
> URL: https://issues.apache.org/jira/browse/DERBY-6726
> Project: Derby
> Issue Type: Bug
> Components: SQL
> Affects Versions: 10.10.1.1
> Reporter: Tim Dudgeon
>
> Saw this strange exception when doing an insert to a table with a trigger
> {code}
> Tue Sep 02 13:39:09 BST 2014 Thread[SQLExecution,1,system] (XID = 62693), (SESSIONID = 1), (DATABASE = C:/Users/timbo/Documents/IJCProjects/mini-regs/Vanilla Oracle/.config/derby-minireg-01-sep/db), (DRDAID = null), Failed Statement is: UPDATE samples SET sample_code = 'S123456' WHERE sample_id = CAST (org.apache.derby.iapi.db.Factory::getTriggerExecutionContext().getNewRow().getObject(1) AS INTEGER)
> java.lang.NullPointerException
> at org.apache.derby.impl.sql.catalog.DataDictionaryImpl.getTriggerActionString(Unknown Source)
> at org.apache.derby.iapi.sql.dictionary.TriggerDescriptor.getActionSPS(Unknown Source)
> at org.apache.derby.impl.sql.execute.GenericTriggerExecutor.getAction(Unknown Source)
> at org.apache.derby.impl.sql.execute.RowTriggerExecutor.fireTrigger(Unknown Source)
> at org.apache.derby.impl.sql.execute.TriggerEventActivator.notifyEvent(Unknown Source)
> at org.apache.derby.impl.sql.execute.UpdateResultSet.fireAfterTriggers(Unknown Source)
> at org.apache.derby.impl.sql.execute.UpdateResultSet.open(Unknown Source)
> at org.apache.derby.impl.sql.GenericPreparedStatement.executeStmt(Unknown Source)
> at org.apache.derby.impl.sql.GenericPreparedStatement.executeSubStatement(Unknown Source)
> at org.apache.derby.impl.sql.execute.GenericTriggerExecutor.executeSPS(Unknown Source)
> at org.apache.derby.impl.sql.execute.RowTriggerExecutor.fireTrigger(Unknown Source)
> at org.apache.derby.impl.sql.execute.TriggerEventActivator.notifyEvent(Unknown Source)
> at org.apache.derby.impl.sql.execute.InsertResultSet.normalInsertCore(Unknown Source)
> at org.apache.derby.impl.sql.execute.InsertResultSet.open(Unknown Source)
> at org.apache.derby.impl.sql.GenericPreparedStatement.executeStmt(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.EmbedStatement.execute(Unknown Source)
> at org.apache.derby.impl.jdbc.EmbedStatement.execute(Unknown Source)
> {code}
> The trigger definition is this:
> {code}
> CREATE TRIGGER samples_code_trg
> AFTER INSERT ON samples
> REFERENCING NEW AS newrow FOR EACH ROW MODE DB2SQL
> UPDATE samples SET sample_code = 'S123456'
> WHERE samples.sample_id = newrow.sample_id;
> {code}
> As mentioned here: http://mail-archives.apache.org/mod_mbox/db-derby-user/201408.mbox/%3Cltq5hl$kps$1@ger.gmane.org%3E
> it could be that its caused by another AFTER UPDATE trigger that's on the table.
> Unfortunately I rebuilt all the tables and triggers and not the problem doesn't happen, so I can't provide a test case.
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