#include <iostream>
using namespace std;
#include <stdio.h>
#define OTL_ODBC_UNIX // Compile OTL 4.0/ODBC
// Default "numeric" NULLs to (-1)
#define OTL_DEFAULT_NUMERIC_NULL_TO_VAL (-1)
// Default "datetime" NULLs to otl_datetime(2000,1,1,0,0,0)
#define OTL_DEFAULT_DATETIME_NULL_TO_VAL otl_datetime(2000,1,1,0,0,0)
// Default "string" NULLs to "***NULL***"
#define OTL_DEFAULT_STRING_NULL_TO_VAL "***NULL***"
// Default "char" NULLs to '*'
#define OTL_DEFAULT_CHAR_NULL_TO_VAL '*'
#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]>,NULL,:f4<timestamp>)",
// SQL statement
db // connect object
);
char tmp[32];
otl_datetime f4(2001,2,24,13,21,11);
for(int i=1;i<=100;++i){
sprintf(tmp,"Name%d",i);
if(i==10)
o<<(float)i<<otl_null()<<otl_null();
else
o<<(float)i<<tmp<<f4;
}
}
void select()
{
otl_stream i(50, // buffer size
"select f1,f2,f2 f22,f3,f4 "
"from test_tab "
"where f1>=:f11<int> and f1<=:f12<int>*2",
// SELECT statement
db // connect object
);
// create select stream
float f1;
char f2[31];
char f22;
int f3;
otl_datetime f4;
i<<8<<8; // assigning :f11 = 8, :f12=8
// SELECT automatically executes when all input variables are
// assigned. First portion of output rows is fetched to the buffer
cout<<"=====> Fetching rows and printing out default values instead of NULLs"<<endl;
while(!i.eof()){ // while not end-of-data
i>>f1;
cout<<"f1="<<f1<<", ";
i>>f2;
cout<<"f2="<<f2<<", ";
i>>f22;
cout<<"f22="<<f22<<", ";
i>>f3;
cout<<"f3="<<f3<<", ";
i>>f4;
cout<<"f4="<<f4.month<<"/"
<<f4.day<<"/"
<<f4.year<<" "
<<f4.hour<<":"
<<f4.minute<<":"
<<f4.second;
cout<<endl;
}
i<<8<<8; // assigning :f11 = 8, :f12=8
cout<<"=====> Fetching rows and printing out NULLs"<<endl;
while(!i.eof()){ // while not end-of-data
i>>f1;
if(i.is_null())
cout<<"f1=NULL, ";
else
cout<<"f1="<<f1<<", ";
i>>f2;
if(i.is_null())
cout<<"f2=NULL, ";
else
cout<<"f2="<<f2<<", ";
i>>f22;
if(i.is_null())
cout<<"f22=NULL, ";
else
cout<<"f22="<<f22<<", ";
i>>f3;
if(i.is_null())
cout<<"f3=NULL, ";
else
cout<<"f3="<<f3<<", ";
i>>f4;
if(i.is_null())
cout<<"f4=NULL,";
else
cout<<"f4="<<f4.month<<"/"
<<f4.day<<"/"
<<f4.year<<" "
<<f4.hour<<":"
<<f4.minute<<":"
<<f4.second;
cout<<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), f3 int, f4 datetime)"
); // 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
}
db.logoff(); // disconnect from MS SQL Server
return 0;
}
=====> Fetching rows and printing out default values instead of NULLs
f1=8, f2=Name8, f22=N, f3=-1, f4=2/24/2001 13:21:11
f1=9, f2=Name9, f22=N, f3=-1, f4=2/24/2001 13:21:11
f1=10, f2=***NULL***, f22=*, f3=-1, f4=1/1/2000 0:0:0
f1=11, f2=Name11, f22=N, f3=-1, f4=2/24/2001 13:21:11
f1=12, f2=Name12, f22=N, f3=-1, f4=2/24/2001 13:21:11
f1=13, f2=Name13, f22=N, f3=-1, f4=2/24/2001 13:21:11
f1=14, f2=Name14, f22=N, f3=-1, f4=2/24/2001 13:21:11
f1=15, f2=Name15, f22=N, f3=-1, f4=2/24/2001 13:21:11
f1=16, f2=Name16, f22=N, f3=-1, f4=2/24/2001 13:21:11
=====> Fetching rows and printing out NULLs
f1=8, f2=Name8, f22=N, f3=NULL, f4=2/24/2001 13:21:11
f1=9, f2=Name9, f22=N, f3=NULL, f4=2/24/2001 13:21:11
f1=10, f2=NULL, f22=NULL, f3=NULL, f4=NULL,
f1=11, f2=Name11, f22=N, f3=NULL, f4=2/24/2001 13:21:11
f1=12, f2=Name12, f22=N, f3=NULL, f4=2/24/2001 13:21:11
f1=13, f2=Name13, f22=N, f3=NULL, f4=2/24/2001 13:21:11
f1=14, f2=Name14, f22=N, f3=NULL, f4=2/24/2001 13:21:11
f1=15, f2=Name15, f22=N, f3=NULL, f4=2/24/2001 13:21:11
f1=16, f2=Name16, f22=N, f3=NULL, f4=2/24/2001 13:21:11
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.