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https://issues.apache.org/jira/browse/DERBY-4448?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12779871#action_12779871
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Knut Anders Hatlen commented on DERBY-4448:
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One doesn't actually need to override the generated column to see this error.
Just trying to insert DEFAULT in all rows also fails this way:
ij> create table t(a int generated always as (-b), b int);
0 rows inserted/updated/deleted
ij> insert into t(a) values (default);
1 row inserted/updated/deleted
ij> insert into t(a) values (default), (default);
ERROR XJ001: Java exception: '0 >= 0: java.lang.ArrayIndexOutOfBoundsException'.
> ArrayIndexOutOfBoundsException when trying to override generated column
> -----------------------------------------------------------------------
>
> Key: DERBY-4448
> URL: https://issues.apache.org/jira/browse/DERBY-4448
> Project: Derby
> Issue Type: Bug
> Components: SQL
> Affects Versions: 10.5.3.0, 10.6.0.0
> Reporter: Knut Anders Hatlen
> Attachments: forbid.diff
>
>
> ij> create table t(a int, b generated always as (-a));
> 0 rows inserted/updated/deleted
> ij> insert into t(b) values (default), (2);
> ERROR XJ001: Java exception: '0 >= 0:
> java.lang.ArrayIndexOutOfBoundsException'.
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