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harlander3000
 Post subject: How do you add to Collection without initialise whole collec
PostPosted: Sat Feb 09, 2008 6:16 am 
Newbie

Joined: Sat Nov 26, 2005 9:03 am
Posts: 5
I have a many-many relationship much like person-event in the hibernate tutorial. When I add an Event to a Persons events hibernate first initialises the whole Set. This is fine for a small set of events but whe you have 40,000 events etc this is inefficent. How do I fix this please?
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erikvaningen
 Post subject:
PostPosted: Sat Feb 09, 2008 7:30 am 
Beginner
Beginner

Joined: Thu Jun 07, 2007 2:38 am
Posts: 28
Location: Italy, Rome
I suppose you already tried lazy loading?

Like
Code:
@ManyToMany(fetch = FetchType.LAZY, cascade = CascadeType.ALL)
with annotations?
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carlolf
 Post subject: Re: How do you add to Collection without initialise whole co
PostPosted: Sat Feb 09, 2008 10:00 am 
Pro
Pro

Joined: Tue Jun 12, 2007 4:13 am
Posts: 209
Location: Berlin, Germany
Hi,

maybe you should not have a mapping for this huge set. The "LAZY" fetch type may not be a solution, because I think it is very likely that you will LOAD 40000 entities. It may be a solution just to map the other side and handle the other case with a native SQL query if needed.

Carlo
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carlolf
 Post subject: Re: How do you add to Collection without initialise whole co
PostPosted: Sat Feb 09, 2008 10:01 am 
Pro
Pro

Joined: Tue Jun 12, 2007 4:13 am
Posts: 209
Location: Berlin, Germany
carlolf wrote:
Hi,
it is very likely that ...


Of course I meant "UNlikely", sorry!

Carlo
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