Java and Sybase nested stored procedures.

Question

Hi!
I have nested Sybase stored procedures, the main procedure calls a helper stored proc.
The main procedure returns 2 result sets before calling the helper store proc and helper store proc returns 1 resultset. After the helper store proc is called, the main store proc returns 2 more resultset. When I run it using SQL client tool the main procedure(and it's helper) execute well and returns rows.
I need to call this store proc in a java code and display all the resultset in screen. I am using Statement:execute(<exec sp>) to execute the store proc and then statement.getResultSet() to get each resultset. The loop is controlled by statement.getMoreResults() .
It displays the first 2 resultsets from main Store Proc. Then the control goes to helper store proc. It executes the helper store proc and displays the resultset from helper. But then it stops there and doesnot
come back to main store proc to execute the remaining resultset.
What I suspect is that, the statement object is getting overlaid when the call goes to helper proc.
Any idea as to how to code to handle multiple nested resultset ?
~ RNS.
My Sybase stored procedure code looks like -
=======================================================================
create procedure main_proc
@param1 int
as
select getdate()
select @@servername
declare @return_val int
exec proc2 @param1, @return_val out
select myCol1,
myCol2,
myCol3=@return_val
from mytable
select db_name()
===========================================================================
Sybase Code for proc2
create procedure proc2
@param1 int,
@param2 int out
as
begin
if something exists(select * from table where whereClause)
select @param2="TRUE"
else
select @param2="FALSE"
select getdate()
end
go
GRANT EXECUTE...
EXEC sp_procxmode 'dbo.proc2,'unchained'
go
====================================================================
Code snippet :-
do {
int iit=0;
rs=stmt.getResultSet();
if ( rs != null ) {
ResultSetMetaData rsd = rs.getMetaData();
int nocols = rsd.getColumnCount();
for (int i=1; i<=nocols; i++)
System.out.println(rsd.getColumnName(i)));
while (rs.next())
for (int i=1; i<=nocols; i++)
System.out.println(rs.getString(rsd.getColumnName(i));
} while (stmt.getMoreResults());

Answer 1

I'm not 100% sure about this, but my guess is that this is caused by the TDS protocol (used by Sybase). TDS makes no difference between the stored procedure you are calling and the "inner" stored procedure, so the driver just returns update counts and result sets as they are generated, regardless of who generated them.
Another guess (as I don't know what driver you are using) is that execute() returns the first result (update count or ResultSet), as opposed to executeQuery(), which returns the first ResultSet (probably discarding the update count). You can make sure of this by calling getMoreResults(); you should get your ResultSet at some point.
Alin.