[jira] [Assigned] (DERBY-6665) Violation of deferred constraints not detected when conglomerates are erroneously shared

["Dag H. Wanvik (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/DERBY-6665?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Dag H. Wanvik reassigned DERBY-6665:
------------------------------------

    Assignee: Dag H. Wanvik

> 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: 10.11.0.0
>            Reporter: Knut Anders Hatlen
>            Assignee: Dag H. Wanvik
>             Fix For: 10.11.0.0
>
>         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.



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