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From "Manish Khettry (JIRA)" <derby-...@db.apache.org>
Subject [jira] Updated: (DERBY-578) Grouped select from temporary table raises null pointer exception in byte code generator
Date Fri, 28 Apr 2006 18:00:39 GMT
     [ http://issues.apache.org/jira/browse/DERBY-578?page=all ]

Manish Khettry updated DERBY-578:
---------------------------------

    Attachment: 578.diff.txt

The problem is simple enough-- we didn't have a conglomerate name for temporary tables. I
fixed the code to behave more like what fillInScanArgs does. Several master files had to be
changed and I think I got to all of them. If there is a wiki entry on how to convert existing
tests to JUnit or if there is some work underway, let me know!





> Grouped select from temporary table raises null pointer exception in byte code generator
> ----------------------------------------------------------------------------------------
>
>          Key: DERBY-578
>          URL: http://issues.apache.org/jira/browse/DERBY-578
>      Project: Derby
>         Type: Bug

>   Components: Services, SQL
>     Reporter: Rick Hillegas
>     Assignee: Manish Khettry
>  Attachments: 578.diff.txt
>
> The last statement in the following script:
> autocommit off;
> declare global temporary table session.ztemp
> ( orderID varchar( 50 ) )
> not logged;
> select orderID from session.ztemp group by orderID;
> raises the following stack trace in the trunk:
> java.lang.NullPointerException
> 	at java.util.Hashtable.get(Hashtable.java:333)
> 	at org.apache.derby.iapi.services.classfile.ClassHolder.findMatchingEntry(ClassHolder.java:656)
> 	at org.apache.derby.iapi.services.classfile.ClassHolder.addUtf8Entry(ClassHolder.java:482)
> 	at org.apache.derby.iapi.services.classfile.ClassHolder.addString(ClassHolder.java:506)
> 	at org.apache.derby.iapi.services.classfile.ClassHolder.addConstant(ClassHolder.java:302)
> 	at org.apache.derby.impl.services.bytecode.BCMethod.push(BCMethod.java:452)
> 	at org.apache.derby.impl.sql.compile.FromBaseTable.generateDistinctScan(FromBaseTable.java:3216)
> 	at org.apache.derby.impl.sql.compile.FromBaseTable.generateResultSet(FromBaseTable.java:3032)
> 	at org.apache.derby.impl.sql.compile.FromBaseTable.generate(FromBaseTable.java:2978)
> 	at org.apache.derby.impl.sql.compile.ProjectRestrictNode.generateMinion(ProjectRestrictNode.java:1196)
> 	at org.apache.derby.impl.sql.compile.ProjectRestrictNode.generate(ProjectRestrictNode.java:1145)
> 	at org.apache.derby.impl.sql.compile.ProjectRestrictNode.generateMinion(ProjectRestrictNode.java:1196)
> 	at org.apache.derby.impl.sql.compile.ProjectRestrictNode.generate(ProjectRestrictNode.java:1145)
> 	at org.apache.derby.impl.sql.compile.ProjectRestrictNode.generateMinion(ProjectRestrictNode.java:1196)
> 	at org.apache.derby.impl.sql.compile.ProjectRestrictNode.generate(ProjectRestrictNode.java:1145)
> 	at org.apache.derby.impl.sql.compile.ProjectRestrictNode.generateMinion(ProjectRestrictNode.java:1196)
> 	at org.apache.derby.impl.sql.compile.ProjectRestrictNode.generate(ProjectRestrictNode.java:1145)
> 	at org.apache.derby.impl.sql.compile.ScrollInsensitiveResultSetNode.generate(ScrollInsensitiveResultSetNode.java:109)
> 	at org.apache.derby.impl.sql.compile.ReadCursorNode.generate(ReadCursorNode.java:118)
> 	at org.apache.derby.impl.sql.compile.CursorNode.generate(CursorNode.java:546)
> 	at org.apache.derby.impl.sql.compile.StatementNode.generate(StatementNode.java:232)
> 	at org.apache.derby.impl.sql.GenericStatement.prepMinion(GenericStatement.java:433)
> 	at org.apache.derby.impl.sql.GenericStatement.prepare(GenericStatement.java:107)
> 	at org.apache.derby.impl.sql.conn.GenericLanguageConnectionContext.prepareInternalStatement(GenericLanguageConnectionContext.java:704)
> 	at org.apache.derby.impl.jdbc.EmbedStatement.execute(EmbedStatement.java:533)
> 	at org.apache.derby.impl.jdbc.EmbedStatement.execute(EmbedStatement.java:480)
> 	at org.apache.derby.impl.tools.ij.ij.executeImmediate(ij.java:299)
> 	at org.apache.derby.impl.tools.ij.utilMain.doCatch(utilMain.java:433)
> 	at org.apache.derby.impl.tools.ij.utilMain.go(utilMain.java:310)
> 	at org.apache.derby.impl.tools.ij.Main.go(Main.java:203)
> 	at org.apache.derby.impl.tools.ij.Main.mainCore(Main.java:169)
> 	at org.apache.derby.impl.tools.ij.Main14.main(Main14.java:55)
> 	at org.apache.derby.tools.ij.main(ij.java:60)

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