Batch deletion for Spring data JPA - spring-data-jpa

Question

I have around 20k records to be deleted from Spring data JPA query , query is related to deleting all records before some particular date.
I am using below query
dao.deleteByCreationDateBefore(new Date());
I think this query hits database for each row deletion.
Please let me know is there any way I can use batch deletion here?
Regards

Answer 1

spting data doen't support batch operation.
try to do it with simple delete if it's possible , like : it be very fast operation (faster than butch delete)
delete from SOME_ENTITY/TABLE where CreationDate < new Date()/curentDate
if your dao method delete record by record :
But you can do it with hibernate/jpa in dao level , like (example from site with persist) from Hibernate/JPA Batch Insert and Batch Update Example:
em.getTransaction().begin();
for (int i = 0; i < 100; i++){
Book book = new Book(i, "Hibernate/JPA Batch Insert Example: " + i);
em.persist(book);
if (i % batchSize == 0 && i > 0) {
em.flush();
em.clear();
}
}
em.getTransaction().commit();
for hibernate :
and here is article How to batch INSERT and UPDATE statements with Hibernate , read about 'Configuring hibernate.jdbc.batch_size'. And Hibernate JDBC and Connection Properties options for hibernate for hibernate.jdbc.fetch_size and hibernate.jdbc.batch_size