OQL RIGHT OUTER JOIN

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With a RIGHT OUTER JOIN construction, the query compares each row of entity A with each row of entity B to find all pairs of rows which have an association and thus satisfy the join-predicate. If the association exists and the join-predicate is satisfied, column values for each matched pair of rows of A and B are combined into a result row. However, in contrast to the INNER JOIN construction, rows from entity B that do not match entity A, will also be returned. When columns of entity A are specified, these columns contain a null value for these rows.

The syntax is as following:

RIGHT [ OUTER ] JOIN entity_path [ ON <constraint> ]

entity_path Specifies the entity to join and the path from an earlier defined entity in the FROM clause to this entity. The path Crm.Customer/Crm.Customer_Address/Crm.Address defines a path from the earlier defined entity Crm.Customer to the new entity Crm.Address.

ON <constraint> Constrains the specified entity in the JOIN part of the FROM clause. The constraint syntax is similar as those of the WHERE clause. Only the entities and from-aliases from the current and preceding JOIN elements can be used in the constraint.

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