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From "Knut Anders Hatlen (JIRA)" <j...@apache.org>
Subject [jira] Commented: (DERBY-3764) Union Query fail on Derby 10.4.1.3
Date Tue, 08 Jul 2008 20:22:31 GMT

    [ https://issues.apache.org/jira/browse/DERBY-3764?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12611786#action_12611786
] 

Knut Anders Hatlen commented on DERBY-3764:
-------------------------------------------

Thanks for the suggestion, Bryan. Sounds like that's worth looking into. Here's what I found
by taking a brief look at the code mentioned in the stack trace:

ResultColumnList.setUnionResultExpression() asserts that visibleSize() == otherRCL.visibleSize(),
which means that the two sub-queries in the union have the same number of columns. But when
it iterates over the columns, it uses size() which includes the group by columns. Since the
two sub-queries have a different number of columns in the group by clause, an index-out-of-bounds
exception is thrown when the method iterates over the group by columns.

I think setUnionResultExpression() should use visibleSize() instead of size(). I'm assuming
here that the non-visible columns are at the end of the RCL (I vaguely recall having read
something about that in a comment sometime, but I don't know this code very well). By making
this change, I could get the statement to compile, but it failed during execution instead:

org.apache.derby.shared.common.sanity.AssertFailure: ASSERT FAILED template.length (2) expected
to be = to nCols (1)
	at org.apache.derby.shared.common.sanity.SanityManager.THROWASSERT(SanityManager.java:162)
	at org.apache.derby.shared.common.sanity.SanityManager.THROWASSERT(SanityManager.java:147)
	at org.apache.derby.impl.store.access.sort.MergeSort.checkColumnTypes(MergeSort.java:441)
	at org.apache.derby.impl.store.access.sort.MergeInserter.insert(MergeInserter.java:98)
	at org.apache.derby.impl.sql.execute.SortResultSet.loadSorter(SortResultSet.java:317)
	at org.apache.derby.impl.sql.execute.SortResultSet.openCore(SortResultSet.java:268)
	at org.apache.derby.impl.sql.execute.BasicNoPutResultSetImpl.open(BasicNoPutResultSetImpl.java:245)
	at org.apache.derby.impl.sql.GenericPreparedStatement.execute(GenericPreparedStatement.java:384)
	at org.apache.derby.impl.jdbc.EmbedStatement.executeStatement(EmbedStatement.java:1235)
	at org.apache.derby.impl.jdbc.EmbedStatement.execute(EmbedStatement.java:625)

> Union Query fail on Derby 10.4.1.3
> ----------------------------------
>
>                 Key: DERBY-3764
>                 URL: https://issues.apache.org/jira/browse/DERBY-3764
>             Project: Derby
>          Issue Type: Bug
>    Affects Versions: 10.3.1.4, 10.4.1.3
>         Environment: Windows XP SP2, NetBeans 6.1 (IDE), Pentium 2 Core 512 Ram, Java
1.6.0_05
>            Reporter: Heleno da Silva Alves
>         Attachments: CONSTAS_REMESSA.sql, database_test.10.0.zip, database_test.10.3.zip,
database_test.10.4.zip, export_contas_remessas.exp
>
>
>     Running a Query on Derby 10.4.1.3 and 10.3.1.4 I got this error message: Error code
0, SQL state XJ001: Java Exception: '4 >= 4: java.lang.ArrayIndexOutOfBoundsException'.
>     After throw this exception the database shutdown and lost the connection.
>     I'm updating an application from a previous version of Derby (Bundle-Version: 10.0.2000001
From derby.jar Manifest) so this query works fine in version 10.0.
> The Query:
> select 0 vlr_proc_anterior
>              , 0 vlr_proc_atual
>              , sum(vlr_contabil + vlr_ajuste) disp_financeira    
>              from contas_remessa rec
>              where cd_tipo = 1105 and cd_conta = 4
>              group by rec.cd_conta, rec.ds_conta
>              union
>              select case when cd_tipo = 170 then sum(vlr_contabil) + sum(vlr_ajuste)
else 0 end vlr_proc_anterior
>                   , case when cd_tipo = 175 then sum(vlr_contabil) + sum(vlr_ajuste)
else 0 end vlr_proc_atual
>                   , 0 disp_financeira
>                   from contas_remessa where cd_tipo in (170, 175) and status = 'S'  
                    
>                   group by cd_tipo
> The deby log entry:
> ----------------------------------------------------------------
> 2008-07-07 14:44:51.282 GMT:
>  Booting Derby version The Apache Software Foundation - Apache Derby - 10.3.1.4 - (561794):
instance c013800d-011a-fdfb-6fa4-00003451d386
> on database directory C:\PAD\database  
> Database Class Loader started - derby.database.classpath=''
> 2008-07-07 14:46:40.506 GMT Thread[SQLExecution,1,system] (XID = 3441038), (SESSIONID
= 0), (DATABASE = C:\PAD\database), (DRDAID = null), Cleanup action starting
> 2008-07-07 14:46:40.506 GMT Thread[SQLExecution,1,system] (XID = 3441038), (SESSIONID
= 0), (DATABASE = C:\PAD\database), (DRDAID = null), Failed Statement is: select 0 vlr_proc_anterior
>              , 0 vlr_proc_atual
>              , sum(vlr_contabil + vlr_ajuste) disp_financeira    
>              from contas_remessa rec
>              where cd_tipo = 1105 and cd_conta = 4
>              group by rec.cd_conta, rec.ds_conta
>              union
>              select case when cd_tipo = 170 then sum(vlr_contabil) + sum(vlr_ajuste)
else 0 end vlr_proc_anterior
>                   , case when cd_tipo = 175 then sum(vlr_contabil) + sum(vlr_ajuste)
else 0 end vlr_proc_atual
>                   , 0 disp_financeira
>                   from contas_remessa where cd_tipo in (170, 175) and status = 'S'  
                    
>                   group by cd_tipo
> java.lang.ArrayIndexOutOfBoundsException: 4 >= 4
> 	at java.util.Vector.elementAt(Vector.java:427)
> 	at org.apache.derby.impl.sql.compile.QueryTreeNodeVector.elementAt(Unknown Source)
> 	at org.apache.derby.impl.sql.compile.ResultColumnList.setUnionResultExpression(Unknown
Source)
> 	at org.apache.derby.impl.sql.compile.SetOperatorNode.buildRCL(Unknown Source)
> 	at org.apache.derby.impl.sql.compile.SetOperatorNode.bindResultColumns(Unknown Source)
> 	at org.apache.derby.impl.sql.compile.CursorNode.bindStatement(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.netbeans.modules.db.sql.execute.SQLExecuteHelper.execute(SQLExecuteHelper.java:114)
> 	at org.netbeans.modules.db.sql.loader.SQLEditorSupport$SQLExecutor.run(SQLEditorSupport.java:479)
> 	at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:561)
> 	at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:986)
> Cleanup action completed

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