Update statement problem for jdbc adapter

Question

Hi all
In the jdbc sender adapter, I configured as follows:
Query statement
select * from pickdiff where tid is null
Update statement
delete from pickdiff where tid is null
I got following error message:
Database-level error reported by JDBC driver while executing statement 'delete from pickdiff where tid is null'. The JDBC driver returned the following error message: 'java.sql.SQLException: [SQLServer 2000 Driver for JDBC][SQLServer]Die Unterabfrage gab mehr als einen Wert zurück. Das ist ungültig, wenn die Unterabfrage auf =, !=, <, <= , >, >= folgt oder als Ausdruck verwendet wird.'. For details, contact your database server vendor.
If I change the Update statement to
update pickdiff set tid = 'sapxi' where tid is null
Then everything is ok.
Doese any one have some idea about this problem?
Regards
Hui

Answer 1

Hi,
The below statements are from SAP help...
http://help.sap.com/saphelp_nw04/helpdata/en/7e/5df96381ec72468a00815dd80f8b63/frameset.htm
The UPDATE statement must alter exactly those data records that have been selected by the SELECT statement. You can ensure this is the case by using an identical WHERE clause. (See Processing Parameters, SQL Statement for Query, and SQL Statement for Update below).
&#9679;      Processing can only be performed correctly when the isolation level for transaction is set to repeatable_read or serializable.
SQL statement for query: SELECT * FROM table WHERE processed = 0;
SQL statement for update: UPDATE table SET processed = 1 WHERE processed = 0;
processed is the indicator in the database.
please see if setting the isolation level would help....Also are you getting this error always or is it intermitent ?
Thanks,
Renjith