[ https://issues.apache.org/jira/browse/DERBY-4698?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Kathey Marsden reopened DERBY-4698:
-----------------------------------
reopen for back port to 10.5
> 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: 10.5.4.0, 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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