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Date: Wed, 15 Nov 2006 07:20:43 -0800 (PST)
From: "Bryan Pendleton (JIRA)" <jira@apache.org>
To: derby-dev@db.apache.org
Subject: [jira] Updated: (DERBY-1495) Attempt to modify an identity column
 error after resetting identity column
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     [ http://issues.apache.org/jira/browse/DERBY-1495?page=3Dall ]

Bryan Pendleton updated DERBY-1495:
-----------------------------------

    Fix Version/s: 10.2.1.8

Adding 10.2.1.8 Fix Version to reflect the merging of this fix to 10.2 bran=
ch. Thanks Kristian for catching this.

> Attempt to modify an identity column error after resetting identity colum=
n
> -------------------------------------------------------------------------=
-
>
>                 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 versio=
n 10.2.0.3-412239
>            Reporter: Lars Gr=C3=A5mark
>         Assigned To: Bryan Pendleton
>            Priority: Minor
>             Fix For: 10.3.0.0, 10.2.1.8
>
>         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 St=
ate: 42Z23, Error Code: 30000
> -- Although, this works fine
> INSERT INTO MYTABLE(COL2) VALUES(4)

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