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I have a relatively simple query joining two tables. The "Where" criteria can be expressed either in the join criteria or as a where clause. I'm wondering which is more efficient.
Query is to find max sales for a salesman from the beginning of time until...
Started by Gratzy on
, 7 posts
by 7 people.
Answer Snippets (Read the full thread at stackoverflow):
Obviously, there are cases with LEFT....
criteria that establish the JOIN between the two tables into the JOIN clause - everything else - and quite honestly, I don't think there's any measurable performance difference between those two.
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I’d like to start a discussion about using Custom Criteria, partly because there’s not a lot of information available about these and also because I think these are a great feature which deserve some more attention.
Please note that this is still a ‘work...
Answer Snippets (Read the full thread at multicharts):
Custom Criteria: CPC Index by Sunny Harris
The CPC Index is an idea from Sunny Harris, author Criteria makes it possible to optimize on the CPC Index (see new version further in this post):
Code: // MultiCharts Custom Criteria: Sunny....
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Hi, is there an easy way to get the (to-be-generated) sql from a Hibernate Criteria?
Ideally I would have something like:
Criteria criteria = session.createCriteria(Operator.class); ... build up the criteria ... ... and then do something like ... String...
Started by David on
, 4 posts
by 4 people.
Answer Snippets (Read the full thread at stackoverflow):
This is obviously fragile, insecure, subject to break with changes .
If you mean 'MINUS' as in NOT IN, you can assemble an HQL-String instead of using criteria doing, Criteria, or native SQL.
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What are the pros and cons of using Criteria or HQL? The Criteria API is a nice object-oriented way to express queries in Hibernate, but sometimes Criteria Queries are more difficult to understand/build than HQL.
When do you use Criteria and when HQL?...
Started by cretzel on
, 10 posts
by 10 people.
Answer Snippets (Read the full thread at stackoverflow):
Criteria is an object could get appended into the HQL query, ....
For different join types.
Also, HQL is a bit more powerful, I think, e.g .
For example it is much easier to add some HQL .
I mostly prefer Criteria Queries for dynamic queries.
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I am working on an enhancement to a Flex dashboard that will allow the users to save searches. I'm using BlazeDS and Java/Spring/SpringJdbc on the server side.
My question is this: how would you model a search that has one or more criteria, such as:
Value...
Started by Mike Sickler on
, 5 posts
by 5 people.
Answer Snippets (Read the full thread at stackoverflow):
It provides a full model for typesafe querying, which by itself could than just a where clause in your ... .
Not sure what are your from the Hibernate Criteria API .
Is there any harm in storing the whole search criteria in SQL format itself.
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I need to be able to match prospective owners to abandoned animals based on varying criteria and locations.
The owner will have a particular criteria set. Animal type = "dog", breed = "Labrador Retriever", age will need to be between 1 and 5, sex = male...
Started by Shane on
, 4 posts
by 4 people.
Answer Snippets (Read the full thread at stackoverflow):
They might have an....
Or worse for each breed: Consider poodles ...
This saves adding new types (and database tables) for every animal species in the world .
Sometimes we resort to simple name/value pairs (or name/value/type triples ) for such properties .
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How is this possible, I have to following criteria
Criteria criteria = getSession().createCriteria(c); criteria.setResultTransformer(Criteria.DISTINCT_ROOT_ENTITY); criteria.add(Restrictions.eq("active",true)); List list = criteria.list();
The size of...
Started by Kim L on
, 3 posts
by 3 people.
Answer Snippets (Read the full thread at stackoverflow):
In theory you should be looking at setProjection to apply a projection at the SQL .
To-many mapping (which is hopefully self-explanatory), a Criteria -based query like this:
Criteria c the difference between the 2.
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How is something like this done in linq? It has filter criteria on the JOIN.
This is taken from this question: http://stackoverflow.com/questions/1401889/sql-filter-criteria-in-join-criteria-or-where-clause-which-is-more-efficient
select salesman.salesmanid...
Started by Mike on
, 3 posts
by 3 people.
Answer Snippets (Read the full thread at stackoverflow):
Var results = from s in salesmen.
between your tables, you can leave the join to entity framework.
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I need to use year() and month() functions in Criteria API to be able to express a business filter constrain. Expressions like
cri.Add(Expression.Ge("year(Duration.DateFrom)", Year.Value)); cri.Add(Expression.Le("year(Duration.DateTo)", Year.Value));
...
Started by Buthrakaur on
, 4 posts
by 4 people.
Answer Snippets (Read the full thread at stackoverflow):
Your expression order -- I'm assuming you made a typo and you want to query for dates between.
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Hi all,
I want to perform a LEFT OUTER JOIN between two tables using the Criteria API. All I could find in the Hibernate documentation is this method:
Criteria criteria = this.crudService .initializeCriteria(Applicant.class) .setFetchMode("products", ...
Started by Markos Fragkakis on
, 3 posts
by 3 people.
Answer Snippets (Read the full thread at stackoverflow):
Then, when you access the getters on your entity (if your Session is still open), it will be loaded automatically (you ... .
With Hibernate, to retrieve lazily this data, just exclude it from the HQL request .
It can't be lazy.
A join is in the SQL request.
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