[ https://issues.apache.org/jira/browse/DERBY-939?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
A B resolved DERBY-939. ----------------------- Resolution: Fixed Derby Info: (was: [Release Note Needed, Patch Available]) > NullPointerException at ResultSet.close() time for simple query using UNION > and INTERSECT > ----------------------------------------------------------------------------------------- > > Key: DERBY-939 > URL: https://issues.apache.org/jira/browse/DERBY-939 > Project: Derby > Issue Type: Bug > Components: SQL > Affects Versions: 10.1.3.1, 10.2.1.6 > Environment: Embedded and server modes, with > derby.language.logQueryPlan=true > Reporter: A B > Assigned To: Yip Ng > Priority: Minor > Fix For: 10.2.1.6 > > 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) -- This message is automatically generated by JIRA. - 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