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From "Knut Anders Hatlen (JIRA)" <j...@apache.org>
Subject [jira] Created: (DERBY-4414) NullPointerException with JOIN...USING and invalid table name in select list
Date Mon, 19 Oct 2009 15:59:59 GMT
NullPointerException with JOIN...USING and invalid table name in select list
----------------------------------------------------------------------------

                 Key: DERBY-4414
                 URL: https://issues.apache.org/jira/browse/DERBY-4414
             Project: Derby
          Issue Type: Bug
          Components: SQL
    Affects Versions: 10.6.0.0
            Reporter: Knut Anders Hatlen


ij version 10.6
ij> connect 'jdbc:derby:memory:db;create=true';
ij> create table t(a int, b int, c int);
0 rows inserted/updated/deleted
ij> select t.* from t t1 join t t2 using (a);
ERROR XJ001: Java exception: ': java.lang.NullPointerException'.
java.sql.SQLException: Java exception: ': java.lang.NullPointerException'.
        at org.apache.derby.impl.jdbc.SQLExceptionFactory40.getSQLException(SQLExceptionFactory40.java:95)
        at org.apache.derby.impl.jdbc.Util.newEmbedSQLException(Util.java:142)
        at org.apache.derby.impl.jdbc.Util.javaException(Util.java:299)
        at org.apache.derby.impl.jdbc.TransactionResourceImpl.wrapInSQLException(TransactionResourceImpl.java:403)
        at org.apache.derby.impl.jdbc.TransactionResourceImpl.handleException(TransactionResourceImpl.java:346)
        at org.apache.derby.impl.jdbc.EmbedConnection.handleException(EmbedConnection.java:2204)
        at org.apache.derby.impl.jdbc.ConnectionChild.handleException(ConnectionChild.java:81)
        at org.apache.derby.impl.jdbc.EmbedStatement.execute(EmbedStatement.java:614)
        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:363)
        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)
Caused by: java.sql.SQLException: Java exception: ': java.lang.NullPointerException'.
        at org.apache.derby.impl.jdbc.SQLExceptionFactory.getSQLException(SQLExceptionFactory.java:45)
        at org.apache.derby.impl.jdbc.SQLExceptionFactory40.wrapArgsForTransportAcrossDRDA(SQLExceptionFactory40.java:119)
        at org.apache.derby.impl.jdbc.SQLExceptionFactory40.getSQLException(SQLExceptionFactory40.java:70)
        ... 16 more
Caused by: java.lang.NullPointerException
        at org.apache.derby.impl.sql.compile.JoinNode.getAllResultColumns(JoinNode.java:431)
        at org.apache.derby.impl.sql.compile.FromList.expandAll(FromList.java:474)
        at org.apache.derby.impl.sql.compile.ResultColumnList.expandAllsAndNameColumns(ResultColumnList.java:1598)
        at org.apache.derby.impl.sql.compile.ResultColumnList.bindExpressions(ResultColumnList.java:686)
        at org.apache.derby.impl.sql.compile.SelectNode.bindExpressions(SelectNode.java:451)
        at org.apache.derby.impl.sql.compile.DMLStatementNode.bindExpressions(DMLStatementNode.java:227)
        at org.apache.derby.impl.sql.compile.DMLStatementNode.bind(DMLStatementNode.java:140)
        at org.apache.derby.impl.sql.compile.CursorNode.bindStatement(CursorNode.java:249)
        at org.apache.derby.impl.sql.GenericStatement.prepMinion(GenericStatement.java:319)
        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)
        ... 9 more

The query is expected to fail (because the table name in t.* does not match any of the joined
tables), but not with a NullPointerException. A similar query with ON instead of USING fails
more gracefully:

ij> select t.* from t t1 join t t2 on t1.a=t2.a;
ERROR 42X10: 'T' is not an exposed table name in the scope in which it appears.

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