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Posted to derby-dev@db.apache.org by "Kristian Waagan (JIRA)" <ji...@apache.org> on 2006/11/13 12:05:43 UTC
[jira] Commented: (DERBY-1495) Attempt to modify an identity column
error after resetting identity column
[ http://issues.apache.org/jira/browse/DERBY-1495?page=comments#action_12449313 ]
Kristian Waagan commented on DERBY-1495:
----------------------------------------
I have tested/reviewed the patch, and was unable to find any problems. More specifically, I did not see the error I saw when trying to fix the bug. Although my approach were pretty much the same, I suspect I might have done what Bryan did somewhere else in the code path (and in that way made something go wrong).
I ran derbyall and suites.All with both Java SE 5 and 6. Only saw three known problems in derbyall (Compatibility and VerifySignatures).
Patch is small and clean, everything seems to work and testcases have been added.
+1 to commit
> 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
> 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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