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How to call Oracle Function or Procedure using Hibernate (EntityManager) or JPA
(6 answers)
Closed 8 years ago.
Am new to hibernate. Am trying to call a oracle stored procedure through Hibernate. Can I get some steps to follow to call a procedure through Hibernate.
Thanks in advance.
Starting from JPA 2.1 You can use #NamedStoredProcedureQuery annotation. This annotation can be specified on an entity or mapped superclass
#NamedStoredProcedureQuery(name="fooStoredProcedure", procedureName="someProcedureName")
Related
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How to do select the data in batches using hibernate?
(5 answers)
Closed 5 years ago.
Say my query retrieves 30,000 records but I have to retrieve 3000 records in one batch. Totally I have to retrieve 30,000 records in 10 batches. I'm using spring hibernate, how to do?
Fetching data batch by batch using Spring and hibernate, refer below links :-
https://www.mkyong.com/hibernate/hibernate-fetching-strategies-examples/
http://www.javamakeuse.com/2015/03/tutorial-hibernate-4-batch-fetching.html
This question already has answers here:
Hibernate pagination mechanism
(3 answers)
Closed 5 years ago.
In pagination I am having 1000 records but by default it should load only 100 records first and remaining should not load until I fetch those records from database.
Please help me.
Thanks in advance for your help.
Its very simple. In each pagination setFirstResult will be changed.
Using:
query.setFirstResult(0);
query.setMaxResults(100);
Duplicate of hibernate pagination mechanism
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Read Only Database Connection with Hibernate
(3 answers)
Closed 6 years ago.
How can I make my database completely read-only for Hibernate? I don't want Hibernate to be able to change neither table definitions (e.g. create/delete/update tables) nor data in tables. Is there some setting in percictence.xml that makes connection read-only?
Hibernate only does what's asked of it - if you set hibernate.hbm2ddl to auto | update | create | create-drop it will try to modify the DB schema. If you run an insert, it will try to insert data. If you want the DB to be protected against it, assign read-only permissions to the DB user that Hibernate is configured to use.
This question already has an answer here:
EntityManger flushmode in JDBC
(1 answer)
Closed 8 years ago.
entityManager.setFlushMode(FlushModeType.AUTO)
entityManager.setFlushMode(FlushModeType.COMMIT)
What is the difference between above two and what is the advantage of using COMMIT flushMode?
JPA AUTO causes a flush to the database before a query is executed. Simple operations like find don't require a flush since the library can handle the search, however queries would be much more complicated, and so if AUTO is set, it will flush it first. If the mode is set to COMMIT, it will only flush the changes to the database upon a call to commit or flush. If COMMIT is set, and a query is run, it will not return results that have not been flushed.
Source: Another stack overflow question
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How to clear all Hibernate cache (ehcache) using Spring?
(7 answers)
Closed 9 years ago.
Recently uses the secondary level cache in my project there
is some issue with it , i wanted to know how can i clear it secondary cache
If you want to clear cache in code you can use:
sf.getCache().evictEntityRegions()
sf.getCache().evictCollectionRegions()
sf.getCache().evictDefaultQueryRegion()
sf.getCache().evictQueryRegions()
where sf means session factory