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https://issues.apache.org/jira/browse/CAY-2554?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Arseni Bulatski updated CAY-2554:
---------------------------------
Description:
Need to redesign DbRelationship and 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
was:
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
> 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 redesign DbRelationship and 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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