Getting a DB2 SQL Code when there is no SQLException
Joined: Jul 05, 2001
I am executing an update that is successful but may or may not be updating a row based on the WHERE clause. How can I retrieve the SQL code and determine whether or not a row was updated? Thanks, Donna
In general, you can't. Most drivers, support returning an integer value as the output of the result set indicating the number of rows updated or inserted but I believe there is some notion that this is not 100% guarenteed.
If you are performing the update/insert and want to stop if something fails, wrap the entire group of updates/inserts as part of a transaction that can later be rolled back.
This is news to me. executeUpdate() returns an int. In the case of an INSERT/UPDATE/DELETE it should return the number of rows effected. In case of an SQL statement that doesn't return a value it returns 0. Of course it can return a 0 on INSERT/UPDATE/DELETE if no rows are effected.
If there are cases where this doesn't work I would think they are far in the minority.
Since you mention DB2 specifically I know this works with DB2. (and Oracle and SQL Server and mySQL) [ October 23, 2006: Message edited by: Tim LeMaster ]
Sorry Tim, what I should have said is that behavior like this is not supported by 100% of JDBC drivers, therefore you face portability issues if you rely on it. I was under the impression there were cases that this broke such as if too many records were updated or if triggers/stored procedures were involed.