Hibernate

Hi

Present we are using Oracle stored procedures and Callable statements to invoke those procedures to deal with data in our applicaiton JDBC part.  Now we are planning to re-develop that part using Hibernate.  I have some doubts

1. Can we write complex queries using HQL and how fast those are?

2. Can we avoid connection pooling provided by hibernate? Instead of that can we use weblogic container managed pooling mechanism?  Which one is faster.

3. If we call stored procedures how hibernate will handle? is it faster. Im asking about performance.

4. In JDBC we will get ResultSet. In which form we will get results if we use hibernate?

5. Is Hibernate is more reliable if we are having more secured and complicated transactions?

6. If i want to pass one hibernate session into other how i can do?

7. Is there any other technology which is simple and more reilable than hibernate in my senario?

we will deal with wast product data information in our applicaiton.

Good suggestions please. and please dont give references like hibernate.org etc.. i have gone through all those. I need answers form experts who worked extensively on hibernate.
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anumalasAsked:
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orhanbabaConnect With a Mentor Commented:
you can use complex queries in hibernate it can be slow alittle bit  there is no bigger difference.
you can use hibernates pools it is easy to manage and has strong caching capabilities.
calling sp is faster not because of hibernate. stored procedures are compiled on dbserver. there is no difference between hibernate or others
you can use list array list or whatever you want. jdk 5 has serious advantegers about generics it is easy to code.
yes it is reliable .
hibernate session factory will be helpfull.

hibernate is  EJB3 (it is not but looklike that :) ) container. you can use oracle toplink or EJB3 supported app. servers.

The main goel is isolating your applications from database. It is very important because if you change sth from db you dont need to change full of your source.

sorry about bad english
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anumalasAuthor Commented:
Suppose if i convert exisitng stored procedures into prepared statements and complex queries is there any performance leak using hibernate ??
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orhanbabaCommented:
you can use stor. proc. in hibernate. you dont need to convert them to hql.
if you want to convert them to sql queries yes you can have some performance issues. at this point hibernate uses some caching techniques.
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