isn't there a db independent jdbc feature for this now?
thanks
david jencks
On Oct 1, 2008, at 9:29 AM, Fay Wang (JIRA) wrote:
Combine insert and select SQL together when for generated Id with
strategy=GenerationType.IDENTITY
----------------------------------------------------------------------------------------------------
Key: OPENJPA-736
URL: https://issues.apache.org/jira/browse/OPENJPA-736
Project: OpenJPA
Issue Type: Improvement
Affects Versions: 1.3.0
Reporter: Fay Wang
Fix For: 1.3.0
Currently if the strategy of the generated id is
GenerationType.IDENTITY, when an entity object is created, openjpa
will generate two SQL statements. The following is an example
running on DB2:
(1) INSERT INTO EntityA (col1, col2, col3, version) VALUES
(?, ?, ?, ?)
[params=(int) 1, (int) 1, (int) 1, (int) 1]
(2) SELECT IDENTITY_VAL_LOCAL() FROM SYSIBM.SYSDUMMY1
A performance improvement is to take advantage of the "select from
final table" feature in DB2 to combine the insert and select
statement into a single SQL statement as shown below:
SELECT id FROM FINAL TABLE (INSERT INTO EntityA (col1, col2, col3,
version) VALUES (?, ?, ?, ?) )
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
