#include <iostream>
using namespace std;
#include <stdio.h>
#define OTL_ODBC_UNIX // Compile OTL 4.0/ODBC
#include <otlv4.h> // include the OTL 4.0 header file
otl_connect db; // connect object
void insert()
// insert rows into table
{
otl_stream o(50, // buffer size
"insert into test_tab values(:f1<float>,:f2<char[31]>)",
// SQL statement
db // connect object
);
char tmp[32];
for(int i=1;i<=100;++i){
sprintf(tmp,"Name%d",i);
o<<(float)i<<tmp;
}
}
void select()
{
otl_stream i(50, // buffer size
"{call my_proc(:f1<int,in>)}",
// implicit SELECT statement
db, // connect object
otl_implicit_select // implicit SELECT statement
);
float f1;
char f2[31];
i<<8; // assigning :f1 = 8
// SELECT automatically executes when all input variables are
// assigned. First portion of output rows is fetched to the buffer
int n=0;
cout<<"====> Starting a fetch sequence...."<<endl;
while(!i.eof()){ // while not end-of-data
++n;
i>>f1>>f2;
cout<<"f1="<<f1<<", f2="<<f2<<endl;
if(n>=3){
// breaking the fetch sequence after 3 rows are fetched, and
// "cleaning" the state of the SELECT stream.
cout<<"Cancelling the fetch sequence after 3 rows are fetched"<<endl;
i.clean();
break;
}
}
cout<<"====> Starting another fetch sequence..."<<endl;
i<<4; // assigning :f1 = 4
// SELECT automatically executes when all input variables are
// assigned. First portion of output rows is fetched to the buffer
while(!i.eof()){ // while not end-of-data
i>>f1>>f2;
cout<<"f1="<<f1<<", f2="<<f2<<endl;
}
}
int main()
{
otl_connect::otl_initialize(); // initialize ODBC environment
try{
db.rlogon("scott/tigger@sybsql"); // connect to MS SQL Server
otl_cursor::direct_exec
(
db,
"drop table test_tab",
otl_exception::disabled // disable OTL exceptions
); // drop table
otl_cursor::direct_exec
(
db,
"create table test_tab(f1 int, f2 varchar(30))"
); // create table
otl_cursor::direct_exec
(
db,
"drop procedure my_proc",
otl_exception::disabled // disable OTL exceptions
); // drop old version of stored procedure, if there is one.
otl_cursor::direct_exec
(db,
"CREATE PROCEDURE my_proc "
" @F1 int "
"AS "
"SELECT * FROM test_tab "
"WHERE f1>=@F1 AND f1<=@F1*2 "
); // create stored procedure
insert(); // insert records into table
select(); // select records from table
}
catch(otl_exception& p){ // intercept OTL exceptions
cerr<<p.msg<<endl; // print out error message
cerr<<p.stm_text<<endl; // print out SQL that caused the error
cerr<<p.sqlstate<<endl; // print out SQLSTATE
cerr<<p.var_info<<endl; // print out the variable that caused the error
}
db.logoff(); // disconnect from MS SQL Server
return 0;
}
====> Starting a fetch sequence....
f1=8, f2=Name8
f1=9, f2=Name9
f1=10, f2=Name10
Cancelling the fetch sequence after 3 rows are fetched
====> Starting another fetch sequence...
f1=4, f2=Name4
f1=5, f2=Name5
f1=6, f2=Name6
f1=7, f2=Name7
f1=8, f2=Name8
Copyright © 1996, 2007, Sergei Kuchin, email: skuchin@ispwest.com, skuchin@gmail.com .
Permission to use, copy, modify and redistribute this document for any purpose is hereby granted without fee, provided that the above copyright notice appear in all copies.