Details
Minor Description
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)