EJB persistence question...

Question

Hi experts,
I need to do the following operations over a table:
1. Delete all data table.
for example by using SQL: delete from table2. Update several rows at the same time.
for example by using SQL: update MY_TABLE set MY_FIELD = 'New value for the column field'3. Insert several rows at the same time.
for example by using SQL: insert into MY_TABLE select * from MY_TABLE2easiest by using SQL, but using EJBs......!!!
I know that a EJB entity maps one row at the same time and the basic methods of the bean life cycle (create, store, remove, etc) only applies for the row mapped.
How can I do this operations over several rows in a table using EJBs ??
The only manner that I know is to do a loop for to iterate over each entity bean by making a findByPrimaryKey, sets bean attributes and then to wait for the ejbStore, ejbRemove, etc.
is there another way or pattern for manage a table (several rows) in order to avoid this loop...?
thanks in advance

Answer 1

I know that a EJB entity maps one row at the same
time and the basic methods of the bean life cycle
(create, store, remove, etc) only applies for the row
mapped.Exactly !
How can I do this operations over several rows in a
table using EJBs ?? It's not possible.
The only manner that I know is to do a loop for to
iterate over each entity bean by making a
findByPrimaryKey, sets bean attributes and then to
wait for the ejbStore, ejbRemove, etc.
is there another way or pattern for manage a table
(several rows) in order to avoid this loop...?No. Therefore I would advice to use SQL for those operations.
EJB's won't work well, because of performance problems.