OTL 4.0, Example 471 (DB2, stored procedure with output parameters and a return code)

This example demonstrates a DB2 SQL/PL stored procedure with output parameters and a return code.. This example should work as is with DB2 8.2 or higher.

Source Code

#include <iostream>
using namespace std;

#include <stdio.h>
#define OTL_DB2_CLI // Compile OTL 4.0/DB2-CLI
#include <otlv4.h>

otl_connect db; // connect object

void stored_proc(void)
// invoking stored procedure
{
otl_stream o(1, // buffer size should be equal to 1 in case of stored procedure call
"{ :rc<int,out> = call my_proc("
" :A<int,inout>, "
" :B<char[31],out>, "
" :C<char[31],in> "
")}",
// stored procedure call
db // connect object
);

o.set_commit(0); // set stream auto-commit off since
// the stream does not generate transaction

o<<1<<"Test String1"; // assigning :A = 1, :C = "Test String1"

int rc;
int a;
char b[31];

o>>rc>>a>>b;
cout<<"RC="<<rc<<", A="<<a<<", B="<<b<<endl;

}

int main()
{
otl_connect::otl_initialize(); // initialize DB2 CLI environment
try{
db.rlogon("scott/tiger@db2sql"); // connect to DB2
otl_cursor::direct_exec
(db,"DROP PROCEDURE my_proc",0); // drop procedure and ignore any errors
otl_cursor::direct_exec
(db,
"create procedure my_proc "
"(inout a integer, "
" out b varchar(60), "
" inout c varchar(60)) "
"language SQL "
"begin "
" set a = a + 1; "
" set b = c; "
" return 100; "
"end "
); // create stored procedure

stored_proc(); // invoking stored procedure
}
catch(otl_exception& p){ // intercept OTL exceptions
cerr<<p.msg<<endl; // print out error message
cerr<<p.code<<endl; // print out error code
cerr<<p.var_info<<endl; // print out the variable that caused the error
cerr<<p.sqlstate<<endl; // print out SQLSTATE message
cerr<<p.stm_text<<endl; // print out SQL that caused the error
}
db.logoff(); // disconnect from the data source
return 0;
}


Output

RC=100, A=2, B=Test String1

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Copyright © 1996-2017, Sergei Kuchin, email: skuchin@gmail.com, skuchin@gmail.com .

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