[jira] Closed: (DERBY-3950) You should get an error if you try to override a generated column via an INSERT driven by an inner ResultSet

["Rick Hillegas (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/DERBY-3950?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Rick Hillegas closed DERBY-3950.
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> You should get an error if you try to override a generated column via an INSERT driven by an inner ResultSet
> ------------------------------------------------------------------------------------------------------------
>
>                 Key: DERBY-3950
>                 URL: https://issues.apache.org/jira/browse/DERBY-3950
>             Project: Derby
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 10.5.1.1
>            Reporter: Rick Hillegas
>            Assignee: Rick Hillegas
>             Fix For: 10.5.1.1
>
>         Attachments: derby-3950-01-aa-forbidOverrides.diff
>
>
> On DERBY-481 Dag points out the following bug:
> drop table t1;
> drop table t2;
> create table t1( a int, b int generated always as ( -a ) );
> create table t2( a int, b int );
> insert into t2( a, b ) values ( 1, 100 );
> -- should fail to compile. instead, it compiles but at run time the generation clause
> -- overrides the value coming from the select
> insert into t1 select * from t2;
> -- should fail to compile. instead, it compiles but at run time the generation clause
> -- overrides the value coming from the select
> insert into t1 select a, 0 from t2;
> -- should also fail to compile. instead, it compiles but at run time the generation clause
> -- overrides the value coming from the list of literals
> insert into t1 values( 2, 200 );
> select * from t1;

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