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From "Bryan Pendleton (JIRA)" <j...@apache.org>
Subject [jira] Commented: (DERBY-1495) Attempt to modify an identity column error after resetting identity column
Date Wed, 15 Nov 2006 00:16:43 GMT
    [ http://issues.apache.org/jira/browse/DERBY-1495?page=comments#action_12449870 ] 
            
Bryan Pendleton commented on DERBY-1495:
----------------------------------------

The merge to 10.2 was clean, and my testing was successful. Submitted the merged
change to the 10.2 branch as revision 475081

> Attempt to modify an identity column error after resetting identity column
> --------------------------------------------------------------------------
>
>                 Key: DERBY-1495
>                 URL: http://issues.apache.org/jira/browse/DERBY-1495
>             Project: Derby
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 10.2.1.6
>         Environment: Java 1.5.0_06-b05 on Linux Ubuntu 5.10. Derby version 10.2.0.3-412239
>            Reporter: Lars Gråmark
>         Assigned To: Bryan Pendleton
>            Priority: Minor
>             Fix For: 10.3.0.0
>
>         Attachments: preserveColDefault_v1.diff
>
>
> When an identity counter is altered using the ALTER TABLE statement below, it seems as
if the GENERATED BY DEFAULT behavior is lost.
> The following statements will reproduce the error.
> CREATE TABLE MYTABLE (
>   id   INT GENERATED BY DEFAULT AS IDENTITY (START WITH 1, INCREMENT BY 1) NOT NULL
>  ,col2 INT NOT NULL
> )
> -- Insert using an explicit value on the ID-field
> INSERT INTO MYTABLE(ID, COL2) VALUES(2, 2)
> -- Reset the identity field
> ALTER TABLE mytable ALTER COLUMN id RESTART WITH 3
> -- Try inserting another explicit value and the error below is thrown.
> INSERT INTO MYTABLE(ID, COL2) VALUES(4, 4)
> Error: SQL Exception: Attempt to modify an identity column 'ID'. , SQL State: 42Z23,
Error Code: 30000
> -- Although, this works fine
> INSERT INTO MYTABLE(COL2) VALUES(4)

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