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https://issues.apache.org/jira/browse/DERBY-4410?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Knut Anders Hatlen updated DERBY-4410:
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Attachment: adjustIndex.diff
The attached patch appears to fix the problem. It changes the loop so that the
index is adjusted after elements have been removed from or added to the RCL.
This should fix both the harmless double processing and the problematic
skipping of elements.
The patch does not include a regression test, and none of the existsing
regression tests have been run yet.
> NullPointerException when USING clause contains all columns in both join
> tables
> -------------------------------------------------------------------------------
>
> Key: DERBY-4410
> URL: https://issues.apache.org/jira/browse/DERBY-4410
> Project: Derby
> Issue Type: Bug
> Components: SQL
> Affects Versions: 10.6.0.0
> Reporter: Knut Anders Hatlen
> Assignee: Knut Anders Hatlen
> Attachments: adjustIndex.diff
>
>
> ij> create table t(x int);
> 0 rows inserted/updated/deleted
> ij> select t1.*, t2.* from t t1 join t t2 using (x);
> ERROR XJ001: Java exception: ': java.lang.NullPointerException'.
> This statement should have raised an exception because both t1.* and t2.*
> expand to no columns. See DERBY-4407.
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