Greetings,

I'm getting a NPE with Derby 10.5.3.0. Is there a known workaround or can I post this as a bug at JIRA?

A NPE occured at the same location before: http://issues.apache.org/jira/browse/DERBY-1574

To reproduce:
----------------------

CREATE TABLE ABC (ID int PRIMARY KEY NOT NULL);
CREATE TABLE DEF (ID int PRIMARY KEY NOT NULL);

SELECT *
FROM ABC t1
WHERE (SELECT DISTINCT t2.ID FROM DEF t2)
        IN (SELECT t3.ID FROM DEF t3)

----------------------

Leads to

error message:
Error: DERBY SQL error: SQLCODE: -1, SQLSTATE: XJ001, SQLERRMC: java.lang.NullPointerExceptionXJ001.U
SQLState:  XJ001
ErrorCode: -1

Stacktrace:
java.lang.NullPointerException
        at org.apache.derby.iapi.util.JBitSet.or(Unknown Source)
        at org.apache.derby.impl.sql.compile.OptimizerImpl.<init>(Unknown Source)
        at org.apache.derby.impl.sql.compile.Level2OptimizerImpl.<init>(Unknown Source)
        at org.apache.derby.impl.sql.compile.Level2OptimizerFactoryImpl.getOptimizerImpl(Unknown Source)
        at org.apache.derby.impl.sql.compile.OptimizerFactoryImpl.getOptimizer(Unknown Source)
        at org.apache.derby.impl.sql.compile.ResultSetNode.getOptimizer(Unknown Source)
        at org.apache.derby.impl.sql.compile.SelectNode.optimize(Unknown Source)
        at org.apache.derby.impl.sql.compile.SubqueryNode.optimize(Unknown Source)
        at org.apache.derby.impl.sql.compile.SubqueryList.optimize(Unknown Source)
        at org.apache.derby.impl.sql.compile.SelectNode.optimize(Unknown Source)
        at org.apache.derby.impl.sql.compile.DMLStatementNode.optimizeStatement(Unknown Source)
        at org.apache.derby.impl.sql.compile.CursorNode.optimizeStatement(Unknown Source)
        at org.apache.derby.impl.sql.GenericStatement.prepMinion(Unknown Source)
        at org.apache.derby.impl.sql.GenericStatement.prepare(Unknown Source)
        at org.apache.derby.impl.sql.conn.GenericLanguageConnectionContext.prepareInternalStatement(Unknown Source)
        at org.apache.derby.impl.jdbc.EmbedPreparedStatement.<init>(Unknown Source)
        at org.apache.derby.impl.jdbc.EmbedPreparedStatement20.<init>(Unknown Source)
        at org.apache.derby.impl.jdbc.EmbedPreparedStatement30.<init>(Unknown Source)
        at org.apache.derby.impl.jdbc.EmbedPreparedStatement40.<init>(Unknown Source)
        at org.apache.derby.jdbc.Driver40.newEmbedPreparedStatement(Unknown Source)
        at org.apache.derby.impl.jdbc.EmbedConnection.prepareStatement(Unknown Source)
        at org.apache.derby.impl.jdbc.EmbedConnection.prepareStatement(Unknown Source)
        at org.apache.derby.impl.drda.DRDAStatement.prepare(Unknown Source)
        at org.apache.derby.impl.drda.DRDAStatement.explicitPrepare(Unknown Source)
        at org.apache.derby.impl.drda.DRDAConnThread.parsePRPSQLSTT(Unknown Source)
        at org.apache.derby.impl.drda.DRDAConnThread.processCommands(Unknown Source)
        at org.apache.derby.impl.drda.DRDAConnThread.run(Unknown Source)
Cleanup action completed


Regards,
Murat