Re: Java stored procedure performing insert/update/delete

[Steve Ebersole]

Dag, Rick..  thanks for your replies.  I am not subscribed to the list, 
but saw them in archive.

Unfortunately a workaround won't work.  This is support for stored 
procedures across all databases that I am adding in Hibernate.  So 
there has to be a certain level of consistency.  I'll just add a note 
that stored procedures doing manipulation will not work correctly with 
Derby (in terms of getting the "affect rows" count) when used in 
embedded mode and reference to DERBY-211.

On Thu 01 Aug 2013 09:02:15 AM CDT, Steve Ebersole wrote:
Looks like I am seeing https://issues.apache.org/jira/browse/DERBY-211

On Wed 31 Jul 2013 07:02:01 PM CDT, Steve Ebersole wrote:
I am trying to work out how to define a Java stored procedure using
Derby that performs a insert/update/delete and results in the proper
"update count" on the JDBC client.  But I have so far been unsuccessful.

Here is what I have...

First, through JDBC I execute:

create procedure deleteAllUsers()
language java
external name 'TheClass.deleteAllUsers'
parameter style java

TheClass.deleteAllUsers looks like:

public static void deleteAllUsers() {
    Connection conn = DriverManager.getConnection(
"jdbc:default:connection" );
    PreparedStatement ps = conn.prepareStatement( "delete from
t_user" );
    int count = ps.executeUpdate();
    System.out.println( "Count : " + count );
    ps.close();
    conn.close();
}

And on the JDBC client side:

Connection conn = ...;
CallableStatement stmnt = conn.prepareCall( "{call deleteAllUsers()}" );
// yes I know this could be stmnt.executeUpdate()...
stmnt.execute();
int count = stmnt.getUpdateCount();


So the deleteAllUsers() prints the correct count.  But on the client,
I always get zero (and not -1).

Obviously I am doing something wrong.  Any pointers?

Thanks,
Steve