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From "Knut Anders Hatlen (JIRA)" <j...@apache.org>
Subject [jira] Resolved: (DERBY-4698) Simple query with HAVING clause crashes with NullPointerException
Date Mon, 05 Jul 2010 12:50:49 GMT

     [ https://issues.apache.org/jira/browse/DERBY-4698?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Knut Anders Hatlen resolved DERBY-4698.
---------------------------------------

    Fix Version/s: 10.5.3.1
                       (was: 10.5.4.0)
       Resolution: Fixed

Changed 10.5 fix version to match the version on the branch. Resolving the issue.

> Simple query with HAVING clause crashes with NullPointerException
> -----------------------------------------------------------------
>
>                 Key: DERBY-4698
>                 URL: https://issues.apache.org/jira/browse/DERBY-4698
>             Project: Derby
>          Issue Type: Bug
>          Components: SQL
>    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, 10.6.1.0
>         Environment: Windows, Java 1.6
>            Reporter: Matt Doran
>            Assignee: Dag H. Wanvik
>             Fix For: 10.5.3.1, 10.6.1.1, 10.7.0.0
>
>         Attachments: derby-4698-1.diff, derby-4698-1.stat, derby-4698-2.diff, derby-4698-2.stat,
derby-crash-10.4.2.0.log, derby-crash-10.5.3.0.log, derby-crash-10.6.1.0.log, derby.zip
>
>
> Running a simple SQL query containing a having clause causes a NullPointerException.
 I originally encountered this in 10.4.2.0, but have also reproduces this in 10.5.3.0 and
the latest 10.6.1.0.   I raised this on the mailing list too, and Knut said it also fails
on trunk - see http://thread.gmane.org/gmane.comp.apache.db.derby.user/12782
> The query (created throw Hibernate) that causes the crash is:
> SELECT user0_.user_id         AS col_0_0_,
>        SUM(account2_.balance) AS col_1_0_
> FROM   tbl_user user0_
>        INNER JOIN tbl_user_account accountlin1_
>          ON user0_.user_id = accountlin1_.user_id
>        INNER JOIN tbl_account account2_
>          ON accountlin1_.account_id = account2_.account_id
> WHERE  user0_.deleted = 'N'
>        AND ( account2_.account_type IN ( 'USER-01', 'USER' ) )
> GROUP  BY user0_.user_id
> HAVING SUM(account2_.balance) >= 100.0 
> However I simplified it to the following and still caused a crash (though in 10.4.2.0
I found that without the "where" clause is didn't crash but returned no results when it should
have).
> SELECT u.user_id,
>        SUM(a.balance)
> FROM   tbl_user u
>        INNER JOIN tbl_user_account al
>          ON u.user_id = al.user_id
>        INNER JOIN tbl_account a
>          ON al.account_id = a.account_id
> GROUP BY u.user_id
> HAVING sum(a.balance) >= 10.0 
> The derby log showed the following stace trace for 10.6.1.0:
> 2010-06-14 04:59:24.942 GMT Thread[main,5,main] (XID = 5824013), (SESSIONID = 1), (DATABASE
= C:\Development\pc-ng-branch\server\working\data\internal/derby), (DRDAID = null), Failed
Statement is: SELECT u.user_id user_id,
>        SUM(a.balance) acct_sum
> FROM   tbl_user u
>        INNER JOIN tbl_user_account al
>          ON u.user_id = al.user_id
>        INNER JOIN tbl_account a
>          ON al.account_id = a.account_id
> GROUP BY u.user_id
> HAVING sum(a.balance) >= 1.0 
> java.lang.NullPointerException
> 	at org.apache.derby.impl.sql.compile.ColumnReference.remapColumnReferencesToExpressions(Unknown
Source)
> 	at org.apache.derby.impl.sql.compile.AggregateNode.getNewExpressionResultColumn(Unknown
Source)
> 	at org.apache.derby.impl.sql.compile.GroupByNode.addAggregateColumns(Unknown Source)
> 	at org.apache.derby.impl.sql.compile.GroupByNode.addNewColumnsForAggregation(Unknown
Source)
> 	at org.apache.derby.impl.sql.compile.GroupByNode.addAggregates(Unknown Source)
> 	at org.apache.derby.impl.sql.compile.GroupByNode.init(Unknown Source)
> 	at org.apache.derby.iapi.sql.compile.NodeFactory.getNode(Unknown Source)
> 	at org.apache.derby.impl.sql.compile.SelectNode.genProjectRestrict(Unknown Source)
> 	at org.apache.derby.impl.sql.compile.SelectNode.modifyAccessPaths(Unknown Source)
> 	at org.apache.derby.impl.sql.compile.DMLStatementNode.optimizeStatement(Unknown Source)
> 	at org.apache.derby.impl.sql.compile.CursorNode.optimizeStatement(Unknown Source)
> 	at org.apache.derby.impl.sql.GenericStatement.prepMinion(Unknown Source)
> 	at org.apache.derby.impl.sql.GenericStatement.prepare(Unknown Source)
> 	at org.apache.derby.impl.sql.conn.GenericLanguageConnectionContext.prepareInternalStatement(Unknown
Source)
> 	at org.apache.derby.impl.jdbc.EmbedStatement.execute(Unknown Source)
> 	at org.apache.derby.impl.jdbc.EmbedStatement.execute(Unknown Source)
> 	at org.apache.derby.impl.tools.ij.ij.executeImmediate(Unknown Source)
> 	at org.apache.derby.impl.tools.ij.utilMain.doCatch(Unknown Source)
> 	at org.apache.derby.impl.tools.ij.utilMain.runScriptGuts(Unknown Source)
> 	at org.apache.derby.impl.tools.ij.utilMain.go(Unknown Source)
> 	at org.apache.derby.impl.tools.ij.Main.go(Unknown Source)
> 	at org.apache.derby.impl.tools.ij.Main.mainCore(Unknown Source)
> 	at org.apache.derby.impl.tools.ij.Main.main(Unknown Source)
> 	at org.apache.derby.tools.ij.main(Unknown Source)
> Cleanup action completed

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