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Load only the part of the object desired

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relcom

Post subject: Load only the part of the object desired

Posted: Thu Feb 11, 2010 6:03 am

Newbie

Joined: Thu Feb 11, 2010 5:53 am
Posts: 5

Hi,

If I do a hibernate load, the whole object gets loaded with an SQL query involving all the columns of the table. Hpwever, I am interested in only certain part of the Object i.e. a few columns. Can I not pass in these column information, get back an Object and expect to have the info I asked for, with the rest of the object containing default/null values?

My table contains 200 columns(really!).

-thanks

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pb00067

Post subject: Re: Load only the part of the object desired

Posted: Thu Feb 11, 2010 6:11 am

Expert

Joined: Tue Jun 16, 2009 3:36 am
Posts: 990

You can use projection queries for this purpose.
You can also define a ResultTransformer in order to get returned an object instead of an array of values.
See Book "Java Persistence with Hibernate" chapter 15.1.3 Projection and report queries.

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relcom

Post subject: Re: Load only the part of the object desired

Posted: Thu Feb 11, 2010 3:05 pm

Newbie

Joined: Thu Feb 11, 2010 5:53 am
Posts: 5

great! that did the trick. thanks :)

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