HELP!!! Strange Error with Batch Update

Question

While trying to do a batch update with the following preparedstatment:
INSERT INTO TAB1
(DATETIME,CALC_ID,SITE_ID,APPL_ID,VAL)
values (
{ts '2003-06-24 08:49:14'},
(SELECT CALC_ID FROM TAB2 WHERE CALC_NAME=?),
2,
7,
Notice the parameter in the subquery. This works fine for a single executeUpdate. But if i do two preparedstatement.addbatch calls and then executeBatch I see a unique constraint violation on (DATETIME,CALC_ID, and SITE_ID) CALC_ID is the only key that varies in my batch. It is as if the subquery is not being resolved and written literally to the field. If I try the 1st update by itself in add batch it works. If I try the second it works by itself. If I try them together in the batch it fails. The unique constraint is not violated when I execute them singly.
Any Ideas?
Thanks in advance.

Answer 1

I've found that db2, PreparedStatements and batch updating do not work very well together. I've had to use dynmanic sql and build the update statement myself. Actually I wrote a query parser that builds the statement so I can pass it like a PreparedStatement.
I'm not sure if your in db2 ver 7 but if so make sure your using fixpack 9. at lot of bad prepared statement behavior.