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From "Yip Ng" <yipng...@gmail.com>
Subject Re: [jira] Commented: (DERBY-939) NullPointerException at ResultSet.close() time for simple query using UNION and INTERSECT
Date Wed, 02 Aug 2006 08:09:01 GMT
Thanks David.

On 8/1/06, David Van Couvering (JIRA) <derby-dev@db.apache.org> wrote:
>
>     [
> http://issues.apache.org/jira/browse/DERBY-939?page=comments#action_12425143]
>
> David Van Couvering commented on DERBY-939:
> -------------------------------------------
>
> Ran derbyall on this, it passed with the exception of known
> diffs.  Committed revision 427899.  Leaving unresolved as it appears this
> still needs a release note written for it.
>
> > NullPointerException at ResultSet.close() time for simple query using
> UNION and INTERSECT
> >
> -----------------------------------------------------------------------------------------
> >
> >                 Key: DERBY-939
> >                 URL: http://issues.apache.org/jira/browse/DERBY-939
> >             Project: Derby
> >          Issue Type: Bug
> >          Components: SQL
> >    Affects Versions: 10.2.0.0, 10.1.3.0
> >         Environment: Embedded and server modes, with
> derby.language.logQueryPlan=true
> >            Reporter: A B
> >         Assigned To: Yip Ng
> >            Priority: Minor
> >         Attachments: derby939trunkdiffpatch1.txt,
> derby939trunkdiffpatch2.txt, derby939trunkstatpatch1.txt,
> derby939trunkstatpatch2.txt
> >
> >
> > If I set "derby.language.logQueryPlan" to true and then attempt to
> execute the following simple query using UNION and INTERSECT, Derby will
> return the correct results and then, _after_ returning the results, will
> throw a NullPointerException.  This error also occurs for 10.1.
> > To reproduce:
> > > java -Dderby.language.logQueryPlan=true org.apache.derby.tools.ij
> > and then do:
> > create table t1 (i int);
> > create table t2 (j int);
> > create table t3 (a int);
> > ij> select i from t1 union (select j from t2 intersect select a from
> t3);
> > 1
> > -----------
> > 0 rows selected
> > ERROR XJ001: Java exception: ': java.lang.NullPointerException'.
> > If I add data, the query will return the correct results,  but then
> throw the NPE.
> > insert into t1 values 1, 2, 3, 4, 5;
> > insert into t2 values 2, 4, 6, 8, 10;
> > insert into t3 values 2, 3, 4;
> > ij> select i from t1 union (select j from t2 intersect select a from
> t3);
> > 1
> > -----------
> > 1
> > 2
> > 3
> > 4
> > 5
> > 5 rows selected
> > ERROR XJ001: Java exception: ': java.lang.NullPointerException'.
> > The embedded and client stack traces are shown below. Both suggest that
> the problem occurs during the close of the result set.
> > -- Embedded --
> > java.lang.NullPointerException
> >       at
> org.apache.derby.impl.sql.execute.rts.RealUnionResultSetStatistics.getStatementExecutionPlanText
> (RealUnionResultSetStatistics.java:107)
> >       at
> org.apache.derby.impl.sql.execute.rts.RealSortStatistics.getStatementExecutionPlanText
> (RealSortStatistics.java:124)
> >       at
> org.apache.derby.impl.sql.execute.rts.RunTimeStatisticsImpl.getStatementExecutionPlanText
> (RunTimeStatisticsImpl.java:293)
> >       at
> org.apache.derby.impl.sql.execute.BasicNoPutResultSetImpl.finishAndRTS(
> BasicNoPutResultSetImpl.java:633)
> >       at org.apache.derby.impl.sql.execute.SortResultSet.finish(
> SortResultSet.java:479)
> >       at org.apache.derby.impl.jdbc.EmbedResultSet.close(
> EmbedResultSet.java:533)
> >       at org.apache.derby.tools.JDBCDisplayUtil.indent_DisplayResults(
> JDBCDisplayUtil.java:272)
> >       at org.apache.derby.tools.JDBCDisplayUtil.DisplayResults(
> JDBCDisplayUtil.java:260)
> >       at org.apache.derby.impl.tools.ij.utilMain.displayResult(
> utilMain.java:381)
> >       at org.apache.derby.impl.tools.ij.utilMain.doCatch(utilMain.java
> :434)
> >       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)
> > -- Client --
> > ERROR (no SQLState): actual code point, 4692 does not match expected
> code point, 9224
> > java.sql.SQLException: actual code point, 4692 does not match expected
> code point, 9224
> >         at org.apache.derby.client.am.SqlException.getSQLException(
> SqlException.java:280)
> >         at org.apache.derby.client.am.ResultSet.close(ResultSet.java
> :412)
> >         at org.apache.derby.tools.JDBCDisplayUtil.indent_DisplayResults(
> JDBCDisplayUtil.java:272)
> >         at org.apache.derby.tools.JDBCDisplayUtil.DisplayResults(
> JDBCDisplayUtil.java:260)
> >         at org.apache.derby.impl.tools.ij.utilMain.displayResult(
> utilMain.java:381)
> >         at org.apache.derby.impl.tools.ij.utilMain.doCatch(utilMain.java
> :434)
> >         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)
> > Caused by: org.apache.derby.client.am.DisconnectException: actual code
> point, 4692 does not match ex
> > pected code point, 9224
> >         at org.apache.derby.client.net.Reply.zThrowSyntaxError(
> Reply.java:1157)
> >         at
> org.apache.derby.client.net.Reply.parseLengthAndMatchCodePoint(Reply.java
> :1057)
> >         at org.apache.derby.client.net.NetConnectionReply.parseSQLCARD(
> NetConnectionReply.java:2519)
> >         at
> org.apache.derby.client.net.NetConnectionReply.parseRDBCMMreply(
> NetConnectionReply.java:2
> > 00)
> >         at
> org.apache.derby.client.net.NetConnectionReply.readLocalCommit(
> NetConnectionReply.java:13
> > 3)
> >         at org.apache.derby.client.net.ConnectionReply.readLocalCommit(
> ConnectionReply.java:42)
> >         at org.apache.derby.client.net.NetConnection.readLocalCommit_(
> NetConnection.java:1347)
> >         at org.apache.derby.client.am.Connection.readCommit(
> Connection.java:624)
> >         at org.apache.derby.client.am.Connection.readAutoCommit(
> Connection.java:614)
> >         at
> org.apache.derby.client.am.ResultSet.readAutoCommitIfNotAutoCommitted(
> ResultSet.java:509)
> >         at org.apache.derby.client.am.ResultSet.readCloseAndAutoCommit(
> ResultSet.java:474)
> >         at
> org.apache.derby.client.am.ResultSet.flowCloseAndAutoCommitIfNotAutoCommitted
> (ResultSet.j
> > ava:455)
> >         at org.apache.derby.client.am.ResultSet.closeX(ResultSet.java
> :425)
> >         at org.apache.derby.client.am.ResultSet.close(ResultSet.java
> :407)
> > ERROR XJ001: DERBY SQL error: SQLCODE: -1, SQLSTATE: XJ001, SQLERRMC:
> java.lang.NullPointerException
> > [XX] XJ001.U
> > java.sql.SQLException: DERBY SQL error: SQLCODE: -1, SQLSTATE: XJ001,
> SQLERRMC: java.lang.NullPointerException[XX]XJ001.U
> >         at org.apache.derby.client.am.SqlException.getSQLException(
> SqlException.java:280)
> >         at org.apache.derby.client.am.SqlException.getSQLException(
> SqlException.java:295)
> >         at org.apache.derby.client.am.ResultSet.close(ResultSet.java
> :412)
> >         at org.apache.derby.tools.JDBCDisplayUtil.indent_DisplayResults(
> JDBCDisplayUtil.java:272)
> >         at org.apache.derby.tools.JDBCDisplayUtil.DisplayResults(
> JDBCDisplayUtil.java:260)
> >         at org.apache.derby.impl.tools.ij.utilMain.displayResult(
> utilMain.java:381)
> >         at org.apache.derby.impl.tools.ij.utilMain.doCatch(utilMain.java
> :434)
> >         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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