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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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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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Hello, We have two tables Family and Member, the relation between these two is Family has set of members in it but member don't have any family relationship within it.
I wanted get member using dob and family for that I am using Hibernate criteria API...
Started by Ravi Nikam on
, 3 posts
by 3 people.
Answer Snippets (Read the full thread at stackoverflow):
Thank you guys, I have resolved this with one of my colleague as under("members.id")); Criteria crit = session.....
It should be trivial to "translate" this HQL to Criteria though.
Not Criteria, but that's what I'm more fluent with.
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