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HHH-12351 - User Guide: document why Subselect always requires Synchronize

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Vlad Mihalcea 2018-07-03 14:27:17 +03:00
parent a67c6b9cd4
commit 6c49f8ef5c
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documentation/src/main/asciidoc/userguide/chapters/domain/entity.adoc
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@ -350,9 +350,15 @@ include::{sourcedir-mapping}/basic/SubselectTest.java[tag=mapping-Subselect-enti
----
====
[TIP]
====
The goal of the `@Synchronize` annotation in the `AccountSummary` entity mapping is to instruct Hibernate which database tables are needed by the
underlying `@Subselect` SQL query. This way, when executing a HQL or JPQL which selects from the `AccountSummary` entity,
underlying `@Subselect` SQL query. This is because, unlike JPQL and HQL queries, Hibernate cannot parse the underlying native SQL query.
With the `@Synchronize` annotation in place,
when executing a HQL or JPQL which selects from the `AccountSummary` entity,
Hibernate will trigger a Persistence Context flush if there are pending `Account`, `Client` or `AccountTransaction` entity state transitions.
====
[[entity-proxy]]
==== Define a custom entity proxy