This example demonstrates otl_nocommit_stream in ODBC. This kind of OTL stream does not commit, so transactions have to be commited explicitly.
#include <iostream> using namespace std; #include <stdio.h>
#define OTL_ODBC // 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_nocommit_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; } o.flush(); db.commit(); } void select() { otl_stream i(50, // buffer size "select * from test_tab where f1>=:f1<int> and f1<=:f2<int>*2", // SELECT statement db // connect object ); // create select stream float f1; char f2[31]; i<<8<<8; // assigning :f1 = 8, :f2 = 8 // 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; } i<<4<<4; // assigning :f1 = 4, :f2 = 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/tiger@mssql"); // connect to ODBC // This is the Oracle style connect string. // It's equivalent to: UID=scott;PWD=tiger;DSN=mssql 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 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.var_info<<endl; // print out the variable that caused the error cerr<<p.sqlstate<<endl; // print out the SQLSTATE info } db.logoff(); // disconnect from ODBC return 0; }
f1=8, f2=Name8 f1=9, f2=Name9 f1=10, f2=Name10 f1=11, f2=Name11 f1=12, f2=Name12 f1=13, f2=Name13 f1=14, f2=Name14 f1=15, f2=Name15 f1=16, f2=Name16 f1=4, f2=Name4 f1=5, f2=Name5 f1=6, f2=Name6 f1=7, f2=Name7 f1=8, f2=Name8
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