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Posted to commits@cayenne.apache.org by "Arseni Bulatski (JIRA)" <ji...@apache.org> on 2019/03/20 13:45:00 UTC
[jira] [Updated] (CAY-2554) Redesign dbRelationship's and join's
structure
[ https://issues.apache.org/jira/browse/CAY-2554?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Arseni Bulatski updated CAY-2554:
---------------------------------
Summary: Redesign dbRelationship's and join's structure (was: Rebuild dbRelationship's and join's structure)
> Redesign dbRelationship's and join's structure
> ----------------------------------------------
>
> Key: CAY-2554
> URL: https://issues.apache.org/jira/browse/CAY-2554
> Project: Cayenne
> Issue Type: Task
> Components: Core Library
> Affects Versions: 4.2.M1
> Reporter: Arseni Bulatski
> Priority: Major
> Fix For: 4.2.M1
>
>
> Need to create DbJoin in order to represent relation between entities.
> DbJoin will hold relationship's condition(usual join with pairs of attributes or expression join) and two dbRelationships, one at a time for each entities.
> This change will better represent relation from database view and will help to implement some new features.
> Structure:
> DbJoin
> * DbJoinCondition
> * DbRelationship[]
> Condition for pairs of attributes:
> ColumnPairsCondition
> * List<ColumnPair>
> or ExpressionCondition(in future)
> * Expression
>
>
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