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Posted to derby-dev@db.apache.org by "Knut Anders Hatlen (JIRA)" <ji...@apache.org> on 2009/09/25 14:38:16 UTC
[jira] Commented: (DERBY-4387) Infinite loop in
PredicateList.joinClauseTransitiveClosure()
[ https://issues.apache.org/jira/browse/DERBY-4387?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12759513#action_12759513 ]
Knut Anders Hatlen commented on DERBY-4387:
-------------------------------------------
Thread dump when the statement has entered the infinite loop:
"main" prio=3 tid=0x0806f400 nid=0x2 runnable [0xfe28e000]
java.lang.Thread.State: RUNNABLE
at org.apache.derby.impl.sql.compile.PredicateList.joinClauseTransitiveClosure(PredicateList.java:2071)
at org.apache.derby.impl.sql.compile.SelectNode.performTransitiveClosure(SelectNode.java:1109)
at org.apache.derby.impl.sql.compile.SelectNode.preprocess(SelectNode.java:954)
at org.apache.derby.impl.sql.compile.DMLStatementNode.optimizeStatement(DMLStatementNode.java:318)
at org.apache.derby.impl.sql.compile.CursorNode.optimizeStatement(CursorNode.java:573)
at org.apache.derby.impl.sql.GenericStatement.prepMinion(GenericStatement.java:373)
at org.apache.derby.impl.sql.GenericStatement.prepare(GenericStatement.java:88)
at org.apache.derby.impl.sql.conn.GenericLanguageConnectionContext.prepareInternalStatement(GenericLanguageConnectionContext.java:824)
at org.apache.derby.impl.jdbc.EmbedStatement.execute(EmbedStatement.java:606)
- locked <0xbad3dc50> (a org.apache.derby.impl.jdbc.EmbedConnection40)
at org.apache.derby.impl.jdbc.EmbedStatement.execute(EmbedStatement.java:555)
at org.apache.derby.impl.tools.ij.ij.executeImmediate(ij.java:329)
at org.apache.derby.impl.tools.ij.utilMain.doCatch(utilMain.java:521)
at org.apache.derby.impl.tools.ij.utilMain.runScriptGuts(utilMain.java:366)
at org.apache.derby.impl.tools.ij.utilMain.go(utilMain.java:261)
at org.apache.derby.impl.tools.ij.Main.go(Main.java:229)
at org.apache.derby.impl.tools.ij.Main.mainCore(Main.java:184)
at org.apache.derby.impl.tools.ij.Main.main(Main.java:75)
at org.apache.derby.tools.ij.main(ij.java:59)
at org.apache.derby.iapi.tools.run.main(run.java:53)
> Infinite loop in PredicateList.joinClauseTransitiveClosure()
> ------------------------------------------------------------
>
> Key: DERBY-4387
> URL: https://issues.apache.org/jira/browse/DERBY-4387
> Project: Derby
> Issue Type: Bug
> Components: SQL
> Affects Versions: 10.0.2.1, 10.1.3.1, 10.2.2.0, 10.3.3.0, 10.4.2.0, 10.5.3.0, 10.6.0.0
> Reporter: Knut Anders Hatlen
>
> This sequence of statements triggers an infinite loop in PredicateList.joinClauseTransitiveClosure() and never completes:
> create table c (a int, b int, c int);
> create table cc (aa int);
> select * from cc t1, c t2, cc t3 where t3.aa = t2.a and t3.aa = t2.b and t3.aa = t2.c;
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