: Eagerly load recursive relation
Kids speak: Can you write a SQL query and execute that in your RDBM's
tools
that loads something recursively?
HappyNomad wrote:
Really sorry, but I'm still drawing a blank. If you provide some
sample code then it would be easier for me
Can you write a SQL to eagerly load recursive relation ?
2009/8/3 HappyNomad happynomad...@gmail.com
I have a recursive one-to-many relationship that has the default lazy
value of true. How can I execute a query which recursively retrieves
the ENTIRE tree?
Here's the recursive one-to-many
Hi Fabio, thanks for the reply. But I'm not sure I understand the
nature of your question. In any case, the query would need to be in
HQL, and not SQL, since I need to load the actual objects, and not
just scalar values.
On Aug 3, 4:32 pm, Fabio Maulo fabioma...@gmail.com wrote:
Can you
Ok but... Can you write an SQL to eagerly load recursive relation ?
2009/8/3 HappyNomad happynomad...@gmail.com
Hi Fabio, thanks for the reply. But I'm not sure I understand the
nature of your question. In any case, the query would need to be in
HQL, and not SQL, since I need to load the
Really sorry, but I'm still drawing a blank. If you provide some
sample code then it would be easier for me to understand your
suggestion.
On Aug 3, 4:41 pm, Fabio Maulo fabioma...@gmail.com wrote:
Ok but... Can you write an SQL to eagerly load recursive relation ?
2009/8/3 HappyNomad
Kids speak: Can you write a SQL query and execute that in your RDBM's
tools that loads something recursively?
HappyNomad wrote:
Really sorry, but I'm still drawing a blank. If you provide some
sample code then it would be easier for me to understand your
suggestion.
On Aug 3, 4:41 pm,
2009/8/3 HappyNomad happynomad...@gmail.com
Really sorry, but I'm still drawing a blank. If you provide some
sample code then it would be easier for me to understand your
suggestion.
The sample is exactly what I'm asking you.
Can you write a SQL to eagerly load recursive relation ?
--
The SQL to eagerly load the recursive relation would be the same as
what NH generates if I were to add lazy=true onto the
SubCategories's list mapping in my OP, and then execute this query:
string s = from Category as t where t.ParentCategory is null;
session.CreateQuery( s ).ListCategory();
My database is SQL Compact, which does not support CTEs. Although, as
you can see from the outputted SQL in my previous post, it
successfully uses sub-selects to optimally load the tree.
On Aug 3, 4:53 pm, Kim Johansson hagbarddenst...@gmail.com wrote:
Kids speak: Can you write a SQL query
HappyNomad,What NH do with lazy=false is:
load- investigate-load
load- investigate-load
load- investigate-load
load- investigate-load
So it run many SQL with many roundtrips
What you are asking is eagerly load recursive relation that mean load
the entirely three in one roundtrip.
The question
Sorry I mean the entirely tree in one roundtrip obviously. [?]
2009/8/3 Fabio Maulo fabioma...@gmail.com
HappyNomad,What NH do with lazy=false is:
load- investigate-load
load- investigate-load
load- investigate-load
load- investigate-load
So it run many SQL with many roundtrips
What you
I am not asking about how to load the entire tree in one round trip.
I've already investigated that issue, and it is impossible for my
database (CTEs are not supported by SQL Compact).
What I'm asking is: what code can I write against the NH API that will
retrieve the entire Category tree AS IF
I would first ask for your use-case. Why do you need to load all tree
via query ONLY?
Why can't you use different optimizations (fetch types etc) and
retrieve the root of tree and then get all the rest the object.
Yes, it won't make it in a single query.
But you could easily flatten it to a
Hi Dmitiry, thanks for trying to answer my question. I need a query
that loads the entire tree because it gets displayed in a TreeView
user-interface control. It's a sizable tree, but in reality it only
takes just half a second to load using subselect fetch optimization.
Regarding your
A SQL sentences that when executed in your RDBMS returns your records
recursively!!
Original Message -
From: Kim Johansson
To: nhusers@googlegroups.com
Sent: Monday, August 03, 2009 3:53 AM
Subject: [nhusers] Re: Eagerly load recursive relation
Kids speak: Can you write
sentences that when executed in your RDBMS returns your records
recursively!!
Original Message -
*From:* Kim Johansson hagbarddenst...@gmail.com
*To:* nhusers@googlegroups.com
*Sent:* Monday, August 03, 2009 3:53 AM
*Subject:* [nhusers] Re: Eagerly load recursive relation
Kids speak
Johansson hagbarddenst...@gmail.com
*To:* nhusers@googlegroups.com
*Sent:* Monday, August 03, 2009 3:53 AM
*Subject:* [nhusers] Re: Eagerly load recursive relation
Kids speak: Can you write a SQL query and execute that in your RDBM's tools
that loads something recursively?
HappyNomad
@googlegroups.com
*Sent:* Monday, August 03, 2009 3:53 AM
*Subject:* [nhusers] Re: Eagerly load recursive relation
Kids speak: Can you write a SQL query and execute that in your RDBM's
tools
that loads something recursively?
HappyNomad wrote:
Really sorry, but I'm still drawing a blank
:* [nhusers] Re: Eagerly load recursive relation
Kids speak: Can you write a SQL query and execute that in your RDBM's
tools
that loads something recursively?
HappyNomad wrote:
Really sorry, but I'm still drawing a blank. If you provide some
sample code then it would be easier
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