[hibernate-issues] [Hibernate-JIRA] Commented: (HHH-1) Optimize Hibernate for the bulk insertion of related entities

[Martin Ross (JIRA)]

    [ http://opensource.atlassian.com/projects/hibernate/browse/HHH-1?page=comments#action_25438 ] 

Martin Ross commented on HHH-1:
-------------------------------

1)  seems to hold in case

Class Parent
{
  int pk;
}

Class Child
{
  int pk;
  Parent parent;
}

Class Toy
{
  int pk;
  Child owner;
}

>From traversing only immediate associations it is easy to see that
Parent.compareTo(Child)==-1 ==> Child.compareTo(Parent) ==1
Toy.compareTo(Child)==1  ==> Child.compareTo(Toy) ==-1

If Parent.compareTo(Child)==-1 and Child.compareTo(Toy)==-1 then we must make sure that Parent.compareTo(Toy)==-1.

It appears the only way to determine if Parent.compareTo(Toy)==-1 is true is to traverse the graph!



> Optimize Hibernate for the bulk insertion of related entities
> -------------------------------------------------------------
>
>          Key: HHH-1
>          URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-1
>      Project: Hibernate3
>         Type: New Feature

>   Components: core
>  Environment: Hibernate 1.2, MySql 3.1
>     Reporter: Bradley Leupen
>     Priority: Minor

>
>
> It is currently difficult to batch the creation of persistent entities that maintain associations with other entities.
> Add necessary api to hibernate to support the save or update of a collection of entities. An optimization can be applied in this scenario to group inserts / updates by entity class, or table. This will enable the hibernate engine to utilize batching if available, drastically improving performance over a network. 

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