[jira] [Commented] (METAMODEL-1196) relationships incorrectly conflated

["Ken Geis (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/METAMODEL-1196?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16606316#comment-16606316 ] 

Ken Geis commented on METAMODEL-1196:
-------------------------------------

{{org.apache.metamodel.jdbc.JdbcMetadataLoader.loadRelations(ResultSet, Schema)}} collates all relationships by primary key table. The collation should be by {{FK_NAME}} (the foreign key name). In the case that {{FK_NAME}} is null, collation by PK table seems reasonable.

> relationships incorrectly conflated
> -----------------------------------
>
>                 Key: METAMODEL-1196
>                 URL: https://issues.apache.org/jira/browse/METAMODEL-1196
>             Project: Apache MetaModel
>          Issue Type: Bug
>    Affects Versions: 5.1.0
>            Reporter: Ken Geis
>            Priority: Major
>
> (note: 5.1.0 is listed as an unreleased version even though it is released)
> I have the following tables:
> {noformat}
> a (
>     b TEXT,
>     c TEXT,
>     FOREIGN KEY (b) REFERENCES d(e),
>     FOREIGN KEY (c) REFERENCES d(e)
> )
> d (
>     e TEXT PRIMARY KEY
> )
> {noformat}
>  There are two different foreign key relationships, but MetaModel views them as one:
> {noformat}
> Relationship[primaryTable=d,primaryColumns=[e, e],foreignTable=a,foreignColumns=[b, c]]{noformat}



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