8:56 p.m.
Need Support Readonly Session
-----------------------------
Key: HHH-2672
URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-2672
Project: Hibernate3
Issue Type: New Feature
Components: core
Affects Versions: 3.2.4.sp1
Reporter: kindy wu
I think we need a readonly session to impove the Select performance!
code is like this:
session.SetReadonly(true);//or ReadonlySession rSession = new ReadonlySession(session);
Code cs = session.CreateQuery("From Code c");//table codes is very huge
if we set the session to Readonly then the Save,Update,Delete,SaveOrUpdate method is
disable.
and the entities that select from session is not need to write into session cache and
don't need to
generate proxy for lazy fetch.
In a Word Readonly Session work like ibatis and Support good Performance for huge Data
Collection.
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4:09 a.m.
New subject: [Hibernate-JIRA] Resolved: (HHH-2672) Need Support Readonly Session
[
http://opensource.atlassian.com/projects/hibernate/browse/HHH-2672?page=c...
]
Christian Bauer resolved HHH-2672.
----------------------------------
Resolution: Duplicate
Need Support Readonly Session
-----------------------------
Key: HHH-2672
URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-2672
Project: Hibernate3
Issue Type: New Feature
Components: core
Affects Versions: 3.2.4.sp1
Reporter: kindy wu
I think we need a readonly session to impove the Select performance!
code is like this:
session.SetReadonly(true);//or ReadonlySession rSession = new ReadonlySession(session);
Code cs = session.CreateQuery("From Code c");//table codes is very huge
if we set the session to Readonly then the Save,Update,Delete,SaveOrUpdate method is
disable.
and the entities that select from session is not need to write into session cache and
don't need to
generate proxy for lazy fetch.
In a Word Readonly Session work like ibatis and Support good Performance for huge Data
Collection.
--
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4:35 a.m.
New subject: [Hibernate-JIRA] Commented: (HHH-2672) Need Support Readonly Session
[
http://opensource.atlassian.com/projects/hibernate/browse/HHH-2672?page=c...
]
Max Rydahl Andersen commented on HHH-2672:
------------------------------------------
no, a readonly session would still need to deal with proxies and a session cache to
guarantee uniqueness.
if you look for "ibatis" like behavior StatelessSession is for you.
But yes, readonly session request is a duplicate.
Need Support Readonly Session
-----------------------------
Key: HHH-2672
URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-2672
Project: Hibernate3
Issue Type: New Feature
Components: core
Affects Versions: 3.2.4.sp1
Reporter: kindy wu
I think we need a readonly session to impove the Select performance!
code is like this:
session.SetReadonly(true);//or ReadonlySession rSession = new ReadonlySession(session);
Code cs = session.CreateQuery("From Code c");//table codes is very huge
if we set the session to Readonly then the Save,Update,Delete,SaveOrUpdate method is
disable.
and the entities that select from session is not need to write into session cache and
don't need to
generate proxy for lazy fetch.
In a Word Readonly Session work like ibatis and Support good Performance for huge Data
Collection.
--
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-
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1:52 a.m.
New subject: [Hibernate-JIRA] Commented: (HHH-2672) Need Support Readonly Session
[
http://opensource.atlassian.com/projects/hibernate/browse/HHH-2672?page=c...
]
kindy wu commented on HHH-2672:
-------------------------------
yes,i think readonly session don't need to guarantee uniqueness.
if we use "left join fetch" to select a one to many object we also will get
mutilp object for same id.
IList<Order> orders = session.CreateQuery("From Order o Left Join Fetch
o.OrderItems ").List<Orders>();
orders = Util.Distinct<Orders>(orders);
public class Util
{public static IList<T> Distinct<T>(IList<T> list)
{
Assert.IsNotNull(list, "Null Collection!");
if (list.Count == 0)
{
return list;
}
ISet<T> s = new HashedSet<T>();
s.AddAll(list);
list.Clear();
foreach (T t in s)
{
list.Add(t);
}
return list;
}
}
so it just my point of view ,thanks.
Need Support Readonly Session
-----------------------------
Key: HHH-2672
URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-2672
Project: Hibernate3
Issue Type: New Feature
Components: core
Affects Versions: 3.2.4.sp1
Reporter: kindy wu
I think we need a readonly session to impove the Select performance!
code is like this:
session.SetReadonly(true);//or ReadonlySession rSession = new ReadonlySession(session);
Code cs = session.CreateQuery("From Code c");//table codes is very huge
if we set the session to Readonly then the Save,Update,Delete,SaveOrUpdate method is
disable.
and the entities that select from session is not need to write into session cache and
don't need to
generate proxy for lazy fetch.
In a Word Readonly Session work like ibatis and Support good Performance for huge Data
Collection.
--
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2:32 a.m.
New subject: [Hibernate-JIRA] Commented: (HHH-2672) Need Support Readonly Session
[
http://opensource.atlassian.com/projects/hibernate/browse/HHH-2672?page=c...
]
Max Rydahl Andersen commented on HHH-2672:
------------------------------------------
that is a broken model, so no - not gonna happen ;)
Need Support Readonly Session
-----------------------------
Key: HHH-2672
URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-2672
Project: Hibernate3
Issue Type: New Feature
Components: core
Affects Versions: 3.2.4.sp1
Reporter: kindy wu
I think we need a readonly session to impove the Select performance!
code is like this:
session.SetReadonly(true);//or ReadonlySession rSession = new ReadonlySession(session);
Code cs = session.CreateQuery("From Code c");//table codes is very huge
if we set the session to Readonly then the Save,Update,Delete,SaveOrUpdate method is
disable.
and the entities that select from session is not need to write into session cache and
don't need to
generate proxy for lazy fetch.
In a Word Readonly Session work like ibatis and Support good Performance for huge Data
Collection.
--
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-
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hibernate-issues@lists.jboss.org
4 comments
3 participants
participants (3)
-
Christian Bauer (JIRA) -
kindy wu (JIRA)
-
Max Rydahl Andersen (JIRA)