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From "Arseni Bulatski (JIRA)" <>
Subject [jira] [Created] (CAY-2554) Rebuild dbRelationship's and join's structure
Date Wed, 20 Mar 2019 13:43:00 GMT
Arseni Bulatski created CAY-2554:

             Summary: Rebuild dbRelationship's and join's structure
                 Key: CAY-2554
             Project: Cayenne
          Issue Type: Task
          Components: Core Library
    Affects Versions: 4.2.M1
            Reporter: Arseni Bulatski
             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.


 * DbJoinCondition
 * DbRelationship[]

Condition for pairs of attributes:

 * List<ColumnPair>

or ExpressionCondition(in future)
 * Expression



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