Hello,
I have the following class-mapping that contains multiple collections mapped as <bag>:
Code:
<class entity-name="tab_a" table="tab_a" lazy="true"
schema="dbo" dynamic-update="false" dynamic-insert="false"
select-before-update="false">
<id name="tabid" type="string" column="`TABID`">
<generator class="native" />
</id>
<property name="SYSTIMESTAMP" column="`SYSTIMESTAMP`" type="java.sql.Timestamp" />
<bag name="collectionA">
<key column="DOCID" />
<one-to-many entity-name="tab_coll_A" />
</bag>
<bag name="collectionB">
<key column="DOCID" />
<one-to-many entity-name="tab_coll_B" />
</bag>
<bag name="collectionC">
<key column="DOCID" />
<one-to-many entity-name="tab_coll_C" />
</bag>
</class>
I intend to formulate a HQL query in order to load all these <bag> in single query. Using left join does not prevent from generation a separate selects to load each collection:
Code:
from tab_a d
left join d.collectionA
left join d.collectionB
left join d.collectionC
where (d.tabid =:id)
HIBERNATE OUTPUT:
Code:
Hibernate: /* from tab_a d left join d.collectionA left join d.collectionB left join d.collectionC where (d.tabid =:id) */ select ...
Hibernate: /* load one-to-many tab_a.SYSJCRVERSIONS */ select ....
Hibernate: /* load one-to-many tab_a.SYSBINPROPNAME */ select ....
Hibernate: /* load one-to-many tab_a.JCRXMIXINTYPES */ select ...
How to avoid these
load one-to-many in HQL query? Is there any possibility to achive this?
Thank you in advance for your reply.
Regards
Larysa
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