[jira] Commented: (DERBY-4342) SQLSTATE 38000 (NullPointerException) at inner self join and value(x1, x2...)

[Dag H. Wanvik (JIRA)]

    [ 
https://issues.apache.org/jira/browse/DERBY-4342?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12740293#action_12740293
 ] 

Dag H. Wanvik commented on DERBY-4342:
--------------------------------------

Normal join and left outer join raises no error.

This query variant: 

     select * from xyz t1 right outer  join xyz t2 on t1.c1 = t2.c1 where 
value(t1.c1, t1.c2) = 1;

gives an ASSERT on sane build:

Caused by: org.apache.derby.shared.common.sanity.AssertFailure: ASSERT FAILED 
sourceResultSetNumber expected to be >= 0 for T1.C1
        at 
org.apache.derby.shared.common.sanity.SanityManager.THROWASSERT(SanityManager.java:162)
        at 
org.apache.derby.shared.common.sanity.SanityManager.THROWASSERT(SanityManager.java:147)
        at 
org.apache.derby.impl.sql.compile.ColumnReference.generateExpression(ColumnReference.java:941)
        at 
org.apache.derby.impl.sql.compile.CoalesceFunctionNode.generateExpression(CoalesceFunctionNode.java:262)
        at 
org.apache.derby.impl.sql.compile.BinaryOperatorNode.generateExpression(BinaryOperatorNode.java:600)
        at 
org.apache.derby.impl.sql.compile.ProjectRestrictNode.generateMinion(ProjectRestrictNode.java:1521)
        at 
org.apache.derby.impl.sql.compile.ProjectRestrictNode.generate(ProjectRestrictNode.java:1341)
        at 
org.apache.derby.impl.sql.compile.JoinNode.getJoinArguments(JoinNode.java:1577)
        at 
org.apache.derby.impl.sql.compile.JoinNode.generateCore(JoinNode.java:1555)
        at 
org.apache.derby.impl.sql.compile.JoinNode.generateCore(JoinNode.java:1492)
        at 
org.apache.derby.impl.sql.compile.HalfOuterJoinNode.generate(HalfOuterJoinNode.java:691)
        at 
org.apache.derby.impl.sql.compile.ProjectRestrictNode.generateMinion(ProjectRestrictNode.java:1390)
        at 
org.apache.derby.impl.sql.compile.ProjectRestrictNode.generate(ProjectRestrictNode.java:1341)
        at 
org.apache.derby.impl.sql.compile.ProjectRestrictNode.generateMinion(ProjectRestrictNode.java:1390)
        at 
org.apache.derby.impl.sql.compile.ProjectRestrictNode.generate(ProjectRestrictNode.java:1341)
        at 
org.apache.derby.impl.sql.compile.ScrollInsensitiveResultSetNode.generate(ScrollInsensitiveResultSetNode.java:109)
        at 
org.apache.derby.impl.sql.compile.CursorNode.generate(CursorNode.java:606)
        at 
org.apache.derby.impl.sql.compile.StatementNode.generate(StatementNode.java:347)

> SQLSTATE 38000 (NullPointerException) at inner self join and value(x1, x2...)
> -----------------------------------------------------------------------------
>
>                 Key: DERBY-4342
>                 URL: https://issues.apache.org/jira/browse/DERBY-4342
>             Project: Derby
>          Issue Type: Bug
>    Affects Versions: 10.1.1.0, 10.1.2.1, 10.1.3.1, 10.2.1.6, 10.2.2.0, 
> 10.3.1.4, 10.3.2.1, 10.3.3.0, 10.4.1.3, 10.4.2.0, 10.5.1.1
>         Environment: WINXP
>            Reporter: Hubert Garm
>
> create table xyz (c1 int, c2 int);
> insert into xyz values(1,2);
> select * from xyz t1 inner join xyz t2 on t1.c1 = t2.c1 where value(t1.c1, 
> t1.c2) = 1;
> causes the following error:
> FEHLER 38000: Bei der Auswertung eines Ausdrucks wurde die Ausnahme 
> 'java.lang.NullPointerException' ausgeloest.
> FEHLER XJ001: Java-Ausnahme: ': java.lang.NullPointerException'.

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