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From "Dag H. Wanvik (JIRA)" <j...@apache.org>
Subject [jira] Commented: (DERBY-4488) Nullpointer when performing INSERT INTO
Date Mon, 21 Dec 2009 21:45:18 GMT

    [ https://issues.apache.org/jira/browse/DERBY-4488?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12793378#action_12793378
] 

Dag H. Wanvik commented on DERBY-4488:
--------------------------------------

More data points. 
It is a bit weird it only happens on the third execution, not the second. I checked a bit
and found that
Knut is right, the third time, the result set is reopened which does not seem to work.  But
it seems the first time, when the error happens, the InsertResultSet gets its "cleanup" method
called (from ContextManager.cleanupOnError), so the second time we execute, InsertResultSet
looks clean, and it calls sourceResultSet.openCore. However, on the execution and ensuing
error, the cleanup method is not called (context manager gone?!), so on the third execution,
InsertResultSet does no longer look unused, and so sourceResultSet.reopenCore is called, which
then fails.  



> Nullpointer when performing INSERT INTO
> ---------------------------------------
>
>                 Key: DERBY-4488
>                 URL: https://issues.apache.org/jira/browse/DERBY-4488
>             Project: Derby
>          Issue Type: Bug
>          Components: Store
>    Affects Versions: 10.3.1.4, 10.3.2.1, 10.3.3.0, 10.4.1.3, 10.4.2.0, 10.5.1.1, 10.5.2.0,
10.5.3.0, 10.6.0.0
>            Reporter: Huib
>         Attachments: d4488.sql, debug info.txt
>
>
> To replicate, execute the following 4 queries:
> CREATE TABLE feed (fst INTEGER, snd VARCHAR(50), UNIQUE(fst))
> INSERT INTO feed VALUES (1, 'fst')
> CREATE TABLE tbl (col1 INTEGER, col2 INTEGER NOT NULL REFERENCES feed (fst) ON DELETE
RESTRICT ON UPDATE RESTRICT)
> INSERT INTO tbl(col1) SELECT 1 FROM feed
> The result of the last INSERT INTO query is:
> java.lang.NullPointerException
> 	at org.apache.derby.impl.store.access.btree.BTreeScan.initScanParams(Unknown Source)
> 	at org.apache.derby.impl.store.access.btree.BTreeScan.reopenScan(Unknown Source)
> 	at org.apache.derby.impl.sql.execute.TableScanResultSet.reopenScanController(Unknown
Source)
> 	at org.apache.derby.impl.sql.execute.TableScanResultSet.reopenScanController(Unknown
Source)
> 	at org.apache.derby.impl.sql.execute.TableScanResultSet.reopenCore(Unknown Source)
> 	at org.apache.derby.impl.sql.execute.BulkTableScanResultSet.reopenCore(Unknown Source)
> 	at org.apache.derby.impl.sql.execute.ProjectRestrictResultSet.reopenCore(Unknown Source)
> 	at org.apache.derby.impl.sql.execute.NormalizeResultSet.reopenCore(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.EmbedPreparedStatement.executeStatement(Unknown Source)
> 	at org.apache.derby.impl.jdbc.EmbedPreparedStatement.execute(Unknown Source)

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