You are viewing a plain text version of this content. The canonical link for it is here.
Posted to derby-dev@db.apache.org by "Mike Matrigali (JIRA)" <ji...@apache.org> on 2014/09/25 00:43:34 UTC
[jira] [Commented] (DERBY-6665) Violation of deferred constraints
not detected when conglomerates are erroneously shared
[ https://issues.apache.org/jira/browse/DERBY-6665?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14147012#comment-14147012 ]
Mike Matrigali commented on DERBY-6665:
---------------------------------------
I believe this bugs is specific to deferrable constraints so marking as not appropriate to backport to 10.10 and previous releases.
> Violation of deferred constraints not detected when conglomerates are erroneously shared
> ----------------------------------------------------------------------------------------
>
> Key: DERBY-6665
> URL: https://issues.apache.org/jira/browse/DERBY-6665
> Project: Derby
> Issue Type: Bug
> Components: SQL
> Affects Versions: 10.11.1.1
> Reporter: Knut Anders Hatlen
> Assignee: Dag H. Wanvik
> Labels: backport_reject_10_10
> Fix For: 10.11.1.1
>
> Attachments: braindump.diff, derby-6665-01-aa-remove-uniquePKConstraintModes.diff, derby-6665-01-ab-useTableUUIDforCheckConstraints.diff, derby-6665-01-ac-unpositionedScan.diff, derby-6665-01-ad-import-and-unique.diff, derby-6665-01-ae-deferredCheckAndDroppedFK.diff, derby-6665-dhw-dont-share.diff, junit.diff
>
>
> See the following script:
> {noformat}
> ij version 10.11
> ij> connect 'jdbc:derby:memory:db;create=true';
> ij> create table t1(x int primary key);
> 0 rows inserted/updated/deleted
> ij> create table t2(x int primary key);
> 0 rows inserted/updated/deleted
> ij> create table t3(x int, constraint fk1 foreign key (x) references t1 initially deferred, constraint fk2 foreign key (x) references t2 initially deferred);
> 0 rows inserted/updated/deleted
> ij> insert into t1 values 1;
> 1 row inserted/updated/deleted
> ij> autocommit off;
> ij> insert into t3 values 1;
> 1 row inserted/updated/deleted
> ij> insert into t2 values 1;
> 1 row inserted/updated/deleted
> ij> delete from t1;
> 1 row inserted/updated/deleted
> ij> commit;
> ij> select * from t1;
> X
> -----------
> 0 rows selected
> ij> select * from t2;
> X
> -----------
> 1
> 1 row selected
> ij> select * from t3;
> X
> -----------
> 1
> 1 row selected
> {noformat}
> Since T3.X contains a value (1) that is not present in T1, the foreign key FK1 is violated, and the COMMIT statement should have failed.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)